Prime service win repeated orders from Middle East Customer

Tianjin Xinyue Iron and Steel Group focuses on export for more than ten years, the company has always adhered to the principle of "Integrity-based, Customer first, High quality, High efficiency", pursuing 100% customer satisfaction. From pre-sales, production, shipping and after-sales, Xinyue team treat each part sincerely, offer the best service, keep close communication with customers, regularly report the order situation, let customers know every detail of the contract in real time.

The order is aluminum sheet from regular customers in the Middle East, the customer is our old partner more than 4 years, This contract is the fourth aluminum plate renewal order this year, from the initial trial order of one container to the bulk order, customers are determined to choose Xinyue, with the customer's words is "even if the price from others is lower than ours, but he finally placed order to us, because of working with Xinyue more comfortable, more at ease." On the day of signing the contract, the customer quickly arranged the advance payment. Thank you very much for the trust of the customer. Xinyue never fails to live up to the expectation of the customer, and always returns to the customer with the best products and the best quality service.

At present, the production of goods is about to be completed, and the last batch of orders are under negotiation. We believe that customers will continue to choose Xinyue. In the future, we will continue to optimize our products and improve our services, looking forward to becoming more and more customers' partners.

https://www.tjxysteel.com/news/Prime-service-win-orders-from-Middle-East-Customer-2053.html

Fire fighting pipeline from Xinyue Steel Group

Project location: Saudi Arabia

Product:SMLS STEEL PIPE WITH NPT, FBE COATING

Standard and steel grade:ASTM A106 GR B

Specification: 6” x SCH 40 x 6m

Usage:Fire fighting pipelines

At the end of October, Xinyue received an inquiry from UAE customer for Seamless fire pipe, requiring internal and external epoxy powder coating, NPT ends. At present, the goods have been produced and passed the third-party inspection, waiting for delivery.

Fire fighting pipelines normally supplied by Xinyue include:

Standard: ASTM A53 , ASTM A795,ASTM A135, BS1387, EN10255, ASTM A106, EN 10216-1

Dimension: 1/2” - 12”, Sch10/ Sch40 as ASME B36.10M, LIGHT , MEDIUM, HEAVY as BS/EN standard

Pipe End: Grooved end, Threaded end, Beveled end

Surface: Red painted, Hot dip galvanized, Black painted, Blue Painted

In addition to pipes, Xinyue can supply fire-fighting supporting pipe fittings, valves,clamps, etc.

Fire fighting products is to be with the priority of safety. Each batch of steel pipes supplied by Xinyue will be produced and tested in strict accordance with the standards. The testing scope includes chemical composition, tensile test, bending test, NDT, hydrostatic test, etc. At the same time, it can accept the supervision and inspection of any third party and customers to ensure the safety and reliability of the pipeline.

https://www.tjxysteel.com/news/Fire-fighting-pipeline-from-Xinyue-Steel-Group-2077.html

ERW and Seamless steel pipe from Xinyue Steel to Australia

 This is an Australian customer. Since we met, we have successfully completed 10 orders, and the epidemic didn’t stop the pace of cooperation between the two sides. The customer is engaged in the equipment manufacturing industry and attaches great importance to product quality. In the process of order service, from the early cooperation until now, he has become a loyal customer of Xinyue. Because Xinyue has always put product quality first, we firmly believe that this is the cornerstone of enterprise development, and only by creating high-quality products can we be invincible.

Project location：Australia

Product：ERW Steel Pipe and Seamless Steel Pipe

Standard and material：API 5LGR.B

Specifications：4″, 8″, 12″

Application：Pressure Pipeline

Inquiry time：2022.07.06

Order time：2022.07.25

Shipping time：2022.09.03

Arrival time：2022.10.08

In July 2022, the customer placed the order to our company again. For this batch of steel pipes, the customer needs to process the internal threads later, so we need to control the inner diameter of the steel pipes. During the re-inspection of finished products, our quality inspectors recheck the inner diameters of steel pipes one by one to ensure that the inner diameters of each steel pipe meet the processing requirements. Before the shipment, the third-party testing company designated by the customer has carried out the final inspection of the goods, which is up to expectations. All the testing data meet the customer’s requirements. At present, all goods have been put into use and highly praised by customers!

In fact, for Australian customers, Xinyue has many years of successful experience and has already formed its own professional operation process. It will prepare some document templates, packaging statements, Chinese and Australian certificates of origin, etc. in advance for later use. Such a series of operations will help customers to enjoy relevant preferences in customs clearance at the port of destination and provide the best service for customers.

https://www.xysteelpipe.com/erw-and-seamless-steel-pipe-from-xinyue-steel-to-australia/

Common questions refers to resistance welding

 Resistance welding is a method of combining the workpieces and applying pressure through the electrodes, using the resistance heat generated by the current passing through the contact surface of the joint and the adjacent area for welding. Resistance welding is a method in which electric current flows through the contact surface of the workpiece and the resistance heating effect generated in the adjacent area to heat it to a molten or plastic state to form a metal bond. ERW steel pipe is a steel pipe rolled using the electric resistance welding process.

Common welding problems and causes of resistance welding

1. Splash

If the heating is too rapid, and the surrounding plastic ring has not yet formed or is not tight enough, the sharply heated contact point will rise extremely fast due to the temperature. The internal metal is vaporized, and under the action of the electrode pressure, the liquid metal in the ring will be pressed out, and then sprayed to the gap between the plates in the form of splash, which is called the reason for the internal splash:

1) The surface of weldments and electrodes is not clean and there is a lot of dirt;

2) Electrode pressure is too small

3) The weldment and the electrode are not in real contact

4) Iron particles stick to the surface of the electrode

5) The assembly gap is too large, and the two contact surfaces of the workpiece are uneven

6) The workpiece is not clean

7) The shape of the electrode contact surface is not correct

8) The preloading time is too short

9) Excessive current

10) The workpiece is placed unevenly and inclined during welding

11) Small margins.

After the minimum nugget is formed, continue to heat, and the nugget and plastic ring continue to expand outward. When the expansion speed of the nugget in the radial direction is greater than the expansion speed of the plastic ring, it will fly out. The reasons for this are:

1) The welding current is too large;

2) The welding time is too long.

It is caused by the strong electrode pressure breaking the plastic ring around the point core and causing the overflow of liquid metal.

2. Weak soldering

Causes:

1) The voltage is too low, and the magnetic material enters the secondary circuit of the welding machine;

2) The dot pitch is too small;

3) The current is small and the electrode pressure is large;

4) The diameter of the electrode end face is large;

5) Electrode surface wear and stacking;

6) The welding time is insufficient, and the welding specification is too strong.

3. Solder punch through

Causes:

1) The current is too large;

2) Insufficient electrode pressure;

3) The power-on time is too long;

4) Poor electrode cooling conditions;

5) The heating time is too fast

4. Solder joint indentation depth

Causes:

1) The power-on time is too long;

2) Insufficient electrode pressure;

3) The current is too large;

4) The solder joint is seriously overheated;

5) Severe spraying;

6) The original size of the welding and assembly room;

7) The electrode is too sharp (the diameter of the electrode end face is too small)

The electrode indentation depth on the surface of normal solder joints should not exceed 10%-20% of the plate thickness

https://www.xysteelpipe.com/common-questions-refers-to-resistance-welding/

Xinyue Steel Support Bangladesh Steam & Condensate Line Project

The order project to be introduced today the project is used in Bangladesh, which is the first cooperation between Xinyue and customers.

The products mainly include seamless steel pipes, pipe fittings and thermal insulation layer.

Material：ASTM A106 GRADE B

Specification:168.3mm*7.11mm*6m, 114.3mm*6.02mm*6m

Specification:

Usage: Steam & Condensate Line

Timeline:

Received the inquire on 8th November,2021

Signed the contract on 18th November,2021

Delivery time in beginning of January,2022.

Estimated time of arrival in the early February，2022.

After receiving the inquiry, we communicated with the customer at the first time. After knowing the purpose, we provided relevant ITP &MPS technical documents and showed our rich experience in many famous projects, so as to obtain the customer's trust in the quality. Subsequently, in view of the special insulation needs of customers, we provided customers with relevant insulation qualification certificates. The comprehensive and professional service brought no worry to customers. It also laid a solid foundation for subsequent orders.At present, all of goods are expected to be shipped in early January 2022 and will be officially put into the project in March,2022.

It is really believed that the first success cooperation will help Xinyue further into Bangladesh market.

https://www.tjxysteel.com/news/Xinyue-Support-Bangladesh-Steam-Condensate-Project-2079.html

The order for the Middle East marine steel structure project was successfully delivered

Project location：Middle East

Product：T-Type Welding Pipe & SMLS Pipes

Standard and material：

EN10219 EN10225 S355G7/G8+N/MZ35

API 5L X52N PSL2

Specifications：

OD 273-1219MM

WT 12.7-75MM

L 6000-12000MM

Application：Offshore steel structure project

Inquiry time：2022.01.20

Order time：2022.05.31

Shipping time：2022.07.25

Arrival time：2022.08.30

This order is not easy for us and customer. The end user has strict requirements on the steel grade of the steel pipe, and the wall thickness is 20-75mm. Regular customer contacted Xinyue at the first time when they received the project. Many successful cooperation cases in the past make them feel that Xinyue is a very trustworthy partner. Whether resources or professionalism, Xinyue hand this project will give them incomparable confidence. we began to prepare the best scheme when we received the inquiry. However, due to repeated changes in the design, we were unable to confirm the order, but we updated the feasible scheme for the customer many times during the process to support.

Until the end of May, the end user confirmed the final design, customer signed a contract with Xinyue immediately. After the gap of four months to confirm the design, the previous inventory pipes had been sold out. In order to support the customer to complete the project as soon as possible,our company gathered support from multiple departments. The procurement department integrated all resources to find the suitable raw material steel plate for this production. The production department mobilized excellent technical workers to work overtime to put it into production, The document Department handled the freight forwarding procedures and shipping matters in time, while the quality inspection department strictly carried out every test step during the production process, First step carried out physical, chemical and impact tests on the raw steel plate (CNAS laboratory), and then tested the physical and chemical and impact properties of the finished steel pipe and 100% NDT test on the weld area of T-shaped welded pipe, to ensure the quality of all pipes. Through the cooperation of all departments, the delivery date was finally controlled within 40 days. At present, the products have been delivered and put into project production. Wish our customer a better business.

https://www.tjxysteel.com/news/Middle-East-marine-steel-structure-project-2080.html

Xinyue scaffold products export to Russia

Project Location: Russia

Product：Forged swivel fastener

Specification：48.3mm

Standard and Material：BS1139

Usage: scaffolding system construction

Inquiry Time：02.2022

Order Time：03.2022

Shipping Time：04.2022

Arrival Time：05.2022

In February 2022, Xinyue received an inquiry about scaffolding products from a Russian customer. The customer has headquartered in Germany and many branches all over the world. This inquiry is only a trial order, a container. Therefore, we do a detailed investigation about this customer’s background, and we take this trial order positively and seriously. Our full experience in providing products for projects around the world also lay a solid foundation for a deeper understanding with the customer and subsequent orders.

https://www.xysteelpipe.com/xinyue-scaffold-products-export-to-russia/

What Type of Pipes are Used for Fire Protection?

Fire-fighting pipeline refers to the pipeline material used for fire-fighting, connecting fire-fighting equipment and equipment, and transporting fire-fighting water, gas or other media. Due to special requirements, the thickness and material of fire-fighting pipes have special requirements, and red paint is sprayed to transport fire-fighting water.

Since the fire pipeline is often in a static state, the requirements for the pipeline are relatively strict. The pipeline needs to be resistant to pressure, corrosion and high temperature. There are five main types of fire-fighting pipes:

1. Ductile water supply cast iron pipe

After the casting molten iron of No. 18 or above is added with nodularizing agent, the pipe is cast by high-speed centrifugal casting of a centrifugal ductile iron machine, which is called “ductile iron pipe”, referred to as ball pipe, ductile iron pipe and ductile iron pipe for short.

2. Copper pipe

Copper pipe is also called red copper pipe. A type of non-ferrous metal pipe, which is a pressed and drawn seamless pipe. Copper pipes have strong and corrosion-resistant properties, and have become the installation of water pipes, heating and cooling pipes in residential commercial buildings by modern contractors.

3. Alloy pipe

Alloy pipe is a kind of seamless steel pipe, and its performance is much higher than that of ordinary seamless steel pipe, because this steel pipe contains more Cr, and its high temperature resistance, low temperature resistance and corrosion resistance are better than other seamless steel pipes. Therefore, alloy pipes are widely used in petroleum, chemical, electric power, boiler, military and other industries.

4. Composite pipes

The composite pipe is a pipe composed of two or more materials. It is based on a metal pipe and is formed by welding non-metallic materials such as polyethylene and cross-linked polyethylene inside and outside. It has the advantages of metal pipes and non-metal pipes. .

5. Plastic pipes

As an important part of chemical building materials, plastic pipes are widely accepted by the majority of users for their superior performance, hygiene, environmental protection, low consumption, etc., mainly UPVC drainage pipes, UPVC water supply pipes, aluminum-plastic composite pipes, polyethylene (PE) These kinds of water pipes.

Fire pipe installation process:

Installation preparation →main pipe installation →alarm valve installation →riser installation →spray layered main pipe, fire hydrant and branch pipe installation →water flow indicator, fire pump, high-level water tank, water pump combiner installation →pipeline pressure test →pipeline flushing →sprinkler head Branch pipe installation (system comprehensive pressure test and flushing) →throttling device installation →alarm valve accessories, fire hydrant accessories, sprinkler head installation →system water test

https://www.xysteelpipe.com/what-type-of-pipes-are-used-for-fire-protection/

Concrete Weight Coating Seamless Pipe Set Sail To Somalia

Project location：Somalia

Product：Seamless Steel Pipe

Standard and material：API 5L /ASTM A106 GR B

Specifications：12”& 10”

Usage：Gasoil, Fuel Discharge,LPG transmission pipeline

Inquiry time：2021.11.06

Order time：2022.05.12

Shipping time：2022.10.21

Estimated arrival time：2022.12.8

The project is concrete weight coating seamless pipe, which is laid 20 meters underwater for Gasoil, Fuel Discharge,LPG transmission.

All the pipes now have been approved by the supervision and inspection of the third party.

While ensuring the quality, Xinyue also makes every effort to meet the customer’s delivery requirements. The vessel booking has been confirmed on Friday ,14th October, with the ETD of 21th Oct. All the pipes were required to be delivered to the port and loaded into container on Monday, 17th Oct. It was a huge challenge for a batch of 90 containers, which seems impossible to be catch.

With the spirit of never give up to meet the customer’s needs no matter how difficult it was, Xinyue makes things happened , the pipes now sails on the vessel of 21th Oct.

https://www.xysteelpipe.com/concrete-weight-coating-seamless-pipe-set-sail-to-somalia/

Advantages of hot dip galvanized seamless steel pipe

Hot-dip galvanized seamless tube is to make the molten metal react with the iron matrix to produce an alloy layer, so that the matrix and the coating are combined. Hot-dip galvanizing is to pickle the steel pipe first. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned in the tank of ammonium chloride or zinc chloride aqueous solution or mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to the in the hot dip bath. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life.

1. High pressure resistance: hot-dip galvanized seamless tube can withstand higher pressure.

2. Long average service life: paints with an average adhesion of 500g/m2 can be kept for more than 50 years without maintenance in dry and suburban environments.

3. No maintenance required during use: Hot-dip galvanized seamless tubes have excellent weather resistance and long service life, and require no maintenance costs. Compared to painting, it requires regular maintenance, which saves a lot of money and social costs.

4. Good sturdiness, can withstand mechanical damage from handling and lifting: The galvanized layer is an alloy structure with very good hardness and mechanical properties.

5. Local damage or minor defects are still protective: Since zinc is more chemically active than iron, even minor defects can protect exposed steel, which is the protective property of sacrificial anodes.

6. Comprehensive protection, no dead angle: the working characteristics of hot-dip galvanized seamless tube must fully immerse the workpiece in liquid zinc, so that every corner of the workpiece can be in contact with each other, especially the sharp angle and concave surface can thicken the coating, which It is also a place that cannot be reached by spraying.

7. Does not affect the mechanical properties of the original design: hot-dip galvanizing has no effect on the mechanical properties of the seamless tube (SMLS).

Difference between hot galvanizing and cold galvanizing:

Hot-dip galvanized seamless tube: complex physical and chemical reactions occur between the steel pipe matrix and the molten plating solution to form a corrosion-resistant zinc-iron alloy layer with a tight structure. The alloy layer is integrated with the pure zinc layer and the steel tube substrate. Therefore, it has strong corrosion resistance.

Cold galvanized seamless tube: The zinc layer is an electroplating layer, and the zinc layer is independently layered with the steel pipe substrate. The zinc layer is thin, and the zinc layer simply adheres to the steel pipe substrate and is easy to fall off. Therefore, its corrosion resistance is poor. In newly built houses, it is forbidden to use cold galvanized steel pipes as water supply pipes.

https://www.xysteelpipe.com/advantages-of-hot-dip-galvanized-seamless-steel-pipe/

High quality products, fast delivery service – Xinyue becomes a new supplier trusted by customer

Project location：Kuwait

Product：ERW STEEL PIPE

Standard and material：EN10219 EN 10025 S355 JR

Specifications：8 INCH 8 MM

Usage：water transmission

Inquiry time：2022.9.18

Order time：2022.9.22

Shipping time：2022.10.18

Estimated arrival time：2022.11.22

The client is a new client from Kuwait. At the initial stage of inquiry, the client was very urgent requirement for the delivery time. Xinyue matched high-quality inventory resources for the client and booked the sea shipping in advance. Xinyue’s quick response, short delivery time, and high-quality services have continuously won the trust of new clients and begin the cooperation between clients and Xinyue.

https://www.xysteelpipe.com/high-quality-products-fast-delivery-service-xinyue-becomes-a-new-supplier-trusted-by-customer/

Indonesian clients are convinced of Xinyue’s strong qualifications and resources

Project Location: Indonesia

Product：SEAMLESS STEEL PIPE

Specification：Outer Diameter: 60.3MM—168.3MM

Length: 5.8M

Standard and Material：ASTM A53 GR B

Usage: manufacture conveyor rollers

Inquiry Time：2022.07.28

Order Time：2022.09.28

Shipping Time：2022.11.10

This is about a seamless steel pipes order from new customer in Indonesia. At the beginning of the inquiry, the customer were not very interested in us and were very cautious about the negotiation process. However, after we provided various qualifications and certificates, such as ISO certificate, AEO senior certification, as well as our previous rich project records in Indonesia, especially the FORM E certificate, the customer expressed a high recognition and trust to Xinyue.

Then, the customer arranged a third party to inspect our factory and products, and Xinyue is also actively arranged, after that, the customer did not hesitate to sign the first order with us. I believe that through this order, the customer’s recognition of Xinyue will be higher and higher.

https://www.xysteelpipe.com/indonesian-clients-are-convinced-of-xinyues-strong-qualifications-and-resources/

Common defects and causes of cold drawn seamless tubes

In the process of smelting or hot working steel, due to certain factors (such as non-metallic inclusions, gases, and improper process selection or operation, etc.). Resulting in defects in the interior or surface of the seamless tube, which will seriously affect the quality of materials or products, and sometimes lead to scrapping of materials or products.

Looseness, bubbles, shrinkage cavity residues, non-metallic inclusions, segregation, white spots, cracks and various abnormal fracture defects in cold drawn seamless tubes can be found through macro inspection. The methods of macroscopic inspection are divided into two methods: acid leaching inspection and fracture inspection. A brief introduction to common macroscopic defects revealed by acid leaching is as follows:

1. Segregation

Causes of formation: During the casting and solidification process, the aggregation of certain elements caused by selective crystallization and diffusion, resulting in uneven chemical composition. According to the different positions of the distribution, it can be divided into ingot type, center and point segregation.

Macroscopic characteristics: On the acid leaching sample, when the segregation is erodible material or gas inclusions, it is dark in color, irregular in shape, slightly concave, flat at the bottom and has many dense microporous spots. If the resist elements are aggregated, it will be light-colored, irregularly shaped, and relatively smooth micro-convex spots.

2. Looseness

Formation reason: During the solidification process, the steel fails to be welded during the hot working process due to the final solidification shrinkage of the low melting point material and the release of gas to generate voids. According to their distribution, they can be divided into two categories: central and general loose.

Macroscopic features: On the lateral hot acid leaching surface, the pores are irregular polygons and pits with narrow bottoms, which usually appear in segregation spots. In severe cases, there is a tendency to connect into a spongy shape.

3. Inclusions

Formation reason:

① Foreign metal inclusions

Cause: During the pouring process, the metal strips, blocks and sheets fall into the ingot mold or the ferroalloy added at the end of the smelting stage is not melted.

Macroscopic features: On the etched sheet, there are mostly geometric shapes with clear edges and significantly different colors from the surrounding.

② Foreign non-metallic inclusions

Cause: During the pouring process, there is no slag floating out or the refractory material of the furnace lining and the inner wall of the pouring system that has been peeled off into the molten steel.

Macroscopic features: Larger non-metallic inclusions are well identifiable, while smaller inclusions corrode and flake off, leaving small circular holes.

③Flip the skin

Cause of formation: The semi-solidified film on the surface of the bottom-casting ingot is involved in the molten steel.

Macroscopic features: On the acid leaching sample, the color is different from the surrounding, and the shape is irregularly curved and narrow strips, and there are often oxide inclusions and pores around the periphery.

4. Shrinkage

Causes of formation: When the ingot or casting is poured, the liquid in the core cannot be replenished due to the volume shrinkage during final condensation, and macroscopic cavities are formed in the head of the ingot or casting.

Macroscopic features: The shrinkage cavity is located in the center of the transverse acid leaching sample, and the surrounding area is often segregated, mixed or loosely dense. Sometimes caves or crevices can be seen before etching, and after etching, the parts of the holes are darkened and appear as irregularly wrinkled holes.

5. Bubbles

Cause of formation: Defects caused by gas generated and released during the casting of the ingot.

Macroscopic features: On the transverse specimen, there are cracks roughly perpendicular to the surface, with slight oxidation and decarburization nearby. The presence of subcutaneous bubbles below the surface is called subcutaneous bubbles, and the deeper subcutaneous bubbles are called pinholes. During the forging process, these unoxidized and unwelded pores are extended into thin tubes with isolated small pinholes on the cross section. The cross section is similar to the regular point segregation, but the darker color is the inner honeycomb bubble.

6. White Spot

Cause of formation: It is generally considered to be the effect of hydrogen and structural stress, and the segregation and inclusions in the steel also have a certain influence, which is a kind of crack.

Macroscopic features: On the transverse hot acid leaching sample, there are short and thin cracks. On the longitudinal fracture, there are coarse crystalline silver bright white spots.

7. Cracks

Causes of formation: Axial intergranular cracks. When the dendritic structure is serious, cracks occur in the large-sized billet along the main branch of the dendritic structure and between the branches.

Internal cracking: cracking due to improper forging and rolling process.

Macroscopic features: On the cross section, the axial position cracks along the intergranular, showing a spider web shape, and radial cracking in severe cases.

8. Fold

Causes of formation: The surface scars of the cold-drawn carbon steel tube or ingot are uneven and the edges and corners of the tip are superimposed on the cold-drawn seamless tube during forging and rolling, or ears are formed due to improper pass design or operation, and continue rolling. Superimposed during production.

Macroscopic characteristics: On the transverse hot acid dipping sample of cold-drawn seamless steel tube, there is an oblique crack with the surface of the steel, there is serious decarburization in the vicinity, and oxide scales are often contained in the crack.

https://www.xysteelpipe.com/common-defects-and-causes-of-cold-drawn-seamless-tubes/

8 Precautions for seamless pipe forming

Forming and sizing of seamless pipes, some hole design and adjustment methods will directly affect the quality, so we should pay attention to the following eight points when handling the forming of seamless pipes:

1. Before there is no perforation, the hole shape of each rack should be adjusted, and the size of each pass should be measured to ensure that the seamless steel pipe enters each rack stably. In the adjustment, the force should be balanced, and it should not be forced to deform on one frame, so as to ensure the stable and uniform change of the raising angle;

2. Traditional roll forming skills, with single radius, double radius, plus two, three, four or five rolls kneading rolls, two or four rolls sizing to ensure the forming quality. This traditional roll forming technology is mostly used for rectangular tube units with a diameter less than φ114mm;

3. In the production of seamless pipes, control and adjust the equipment errors of the forming and sizing machine bases and the amount of roll bounce, so that even the more old-fashioned units can produce fine high-quality steel pipes;

4. The roll forming skills of the United States, the CTA forming skills of voestalpine, the FF or FFX flexible forming skills of Nakata, Japan, etc., can ensure the shape of the welded joint after forming and good appearance quality, and are suitable for standard A wider range of seamless pipes;

5. During the adjustment process of the unit, first of all, it should be ensured that each pass of the vertical center line is consistent, and the center is used as the base axis to find the positioning scale and the center sleeve. ) is a straight line, and can not show curve beating;

6. In order to reduce elastic deformation, 2 to 3 passes are added to the processing deformation of seamless pipes than the general rectangular pipes;

7. In the deformation structure, the initial deformation point of view should be reduced to ensure a stable bite, the central curved point of view should be appropriately increased, and the rear deformation should be appropriately reduced. Adding deformation passes not only reduces the deformation force, but also makes the strip There is an opportunity to release the surface stress, so that the gradient of the surface stress increases slowly, which can prevent the seamless pipe from cracking;

8. Various forming skills have different advantages and disadvantages, and are suitable for different conditions. According to the use of seamless carbon steel pipes, careful consideration should be given when selecting equipment, and different forming methods should be selected.

https://www.xysteelpipe.com/8-precautions-for-seamless-pipe-forming/

One-stop service, Xinyue once again support Nigeria natural gas transmission project

Having been in the steel pipe industry for many years, Xinyue has already transformed from a single steel pipe manufacturing & exporter to a first-class supplier of professional comprehensive services. Customer’s demand is the driving force behind Xinyue’s continuous innovation and self-improvement. Xinyue’s reputation attracts more and more EPC and oil company end user to establish close cooperation with us. For different projects, customers no longer have a single demand for steel pipes, but entrust Xinyue to directly purchase various products including pipe fittings, valves, stainless steel and steel structures. As a result, Xinyue has established a strong network of resources based on efforts of our team in recent years. What I want to share with you today is a service project from Nigeria.

sales name:Maria Mao

Project location: Nigeria

Products:SMLS Steel Pipe,Valves, Fittings.

Standard and material:API 5L X52 PSL1, API 6D, ASTM A234 WPB

Specification:323.9×10.31mm/ 114,3×6.02mm and etc.

Usage：Transit Gas Nigeria

inquiry time:2021,12,25

Order time:2022.02.28

ETD time:2022.05.20

Order Details

This project is second project supported by Xinyue Steel. There are 800-tons seamless pipe shipped in early 2021. After arriving at the project site, the quality of the pipe passed the third-party inspection arranged by the customer and the end user, and the professional contract operation of Xinyue is highly rated. At the beginning of 2022, Xinyue supported the customer to successfully win a second similar project. After awarded the project, the EPC held a video conference with Xinyue management team soon, effectively finalized the contract details on the meeting. Even in the peak of a resurgence of the epidemic in China, Xinyue flexibly adjusts the allocation of resources. Guaranteed customer delivery date. At present, all the goods are almost finished, waiting for shipment in May.

https://www.xysteelpipe.com/one-stop-service-xinyue-once-again-support-nigeria-natural-gas-transmission-project/

Xinyue scaffold products export to Russia

Project Location: Russia

Product：Forged swivel fastener

Specification：48.3mm

Standard and Material：BS1139

Usage: scaffolding system construction

Inquiry Time：02.2022

Order Time：03.2022

Shipping Time：04.2022

Arrival Time：05.2022

In February 2022, Xinyue received an inquiry about scaffolding products from a Russian customer. The customer has headquartered in Germany and many branches all over the world. This inquiry is only a trial order, a container. Therefore, we do a detailed investigation about this customer’s background, and we take this trial order positively and seriously. Our full experience in providing products for projects around the world also lay a solid foundation for a deeper understanding with the customer and subsequent orders.

https://www.xysteelpipe.com/xinyue-scaffold-products-export-to-russia/

Cold drawn carbon steel pipe

 Cold rolling refers to the processing of steel plates or strips into various types of steel through cold working such as cold drawing, cold bending, and cold drawing at room temperature.

Carbon steel pipes are divided into two categories: hot-rolled and cold-rolled (drawn) steel pipes. Carbon steel pipes are made of steel ingots or solid billets through perforation into capillary tubes, which are then hot-rolled, cold-rolled or cold-drawn. Carbon steel pipe plays an important role in my country’s steel pipe industry.

Cold rolled carbon steel pipe is a cold-drawn or cold-rolled precision seamless steel pipe for mechanical structure and hydraulic equipment with high dimensional accuracy and good surface finish. In addition to general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, and other steel pipes, cold-rolled (pulled) seamless pipes also include carbon thin-walled steel pipes, alloy thin-walled steel pipes, Stainless thin-walled steel pipe, special-shaped steel pipe. The outer diameter of the hot-rolled seamless pipe is generally greater than 32mm, and the wall thickness is 2.5-75mm. The diameter of the cold-rolled seamless pipe can reach 6mm and the wall thickness can reach 0.25mm. Cold rolling has higher dimensional accuracy than hot rolling.

Hot rolled steel pipes are divided into general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, geological steel pipes and other steel pipes.

General carbon steel pipe: It is made of 10, 20, 30, 35, 45 and other high-quality carbon steel 16Mn, 5MnV and other low-alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB and other alloy steel hot-rolled or cold-rolled. Seamless pipes made of low carbon steel such as 10 and 20 are mainly used for fluid transportation pipelines. 45, 40Cr and other medium carbon steel seamless pipes are used to manufacture mechanical parts, such as the stressed parts of automobiles and tractors. Generally, carbon steel pipes are used to ensure the strength and flattening test. Hot-rolled steel pipes are delivered in hot-rolled or heat-treated state; cold-rolled steel pipes are delivered in heat-treated state.

The difference between cold rolling and hot rolling:

1. Cold-rolled section steel allows local buckling of the section, so that the bearing capacity of the member after buckling can be fully utilized; while hot-rolled section steel does not allow local buckling of the section.

2. The reasons for the residual stress of hot-rolled steel and cold-rolled steel are different, so the distribution on the cross-section is also very different. The residual stress distribution on the section of cold-formed thin-walled steel is curved, while the residual stress distribution on the cross-section of hot-rolled or welded steel is thin-film.

3. The free torsional stiffness of hot-rolled steel is higher than that of cold-rolled steel, so the torsion resistance of hot-rolled steel is better than that of cold-rolled steel.

https://www.xysteelpipe.com/cold-drawn-carbon-steel-pipe/

Xinyue elbow manufacturing service project for Nigerian government

Project Location：Nigeria

Products：Bend

Size： 10″

Standard：API PSL2 ANNEX J X65

Coating requirement:3LPP

Application：Offshore Pipeline

Inquiry Time: Dec, 2021

Purchase Time：May, 2022

This order is a regular client in Nigeria for the bend. Xinyue has rich experience in supplying bend. In the early stage, we provided the client with a number of bend production videos and shipment project records, which assured the quality assurance of the client.

After the order confirmed, ITP and MPS were provided, and technical, production and the technical parties held several meetings to communicate and confirm detailed technical details and drawings. To strictly control the production orders, from mother pipe detection to bend production of all kinds of testing, lamination UT test, the bend body and bend end UT testing, magnetic testing, dimension inspection report, the sand blasting test of the bend, salinity, roughness detection, the thickness of the corrosion protection and detection, the entire production schedule updated in real time to the client, let client more understanding and more assured to Xinyue. At present, the order will be finished and shipped to Nigeria.

https://www.xysteelpipe.com/xinyue-elbow-manufacturing-service-project-for-nigerian-government/

Xinyue successfully delivered orders for new customers in Africa

Project location：Kenya

Product：Seamless steel pipe & pipe fittings

Standard and material：API 5L GrB PSL1

Specifications：21.3-219mm*12000mm

Application：Pipeline construction

Inquiry time：2022.01.09

Order time：2022.02.13

Departure time：2022.07.05

Estimated arrival time：2022.09.15

The client is an African project group company. We met in 2020. During that time, xinyue has participated in 4-5 project bids from their company. After frequent communication with customers and video conferences, the customer’s trust and professional recognition of Xinyue has also increased. And finally began the first cooperation in 2022. The cooperative products are galvanized coated seamless pipes and fittings, with up to 200 items. Taking into account the possible collisions on the road, Xinyue has made great efforts in product packaging. All coated pipes are upgraded to tarpaulin packaging, and all pipe fittings are individually packaged in foam paper and in fumigation-free wooden boxes. At present, all products are ready and waiting for delivery, and we look forward to long-term cooperation with customers!

https://www.xysteelpipe.com/xinyue-successfully-delivered-orders-for-new-customers-in-africa/

Quality service is the winning formula for constant orders from regular customers

Project location：CHILE

Product：ERW STEEL PIPE

Standard and material：ASTM A53 GR A

Specifications：18”STD

Usage：Low liquid transmission pipeline

Inquiry time：2022.05.10

Order time：2022.08.05

Shipping time：2022.09.05

Estimated arrival time：2022.10.20

This order is a Chile regular client regular order every year. This client has long time cooperation relationship with Xinyue for many years. Xinyue providing superior quality, fast delivery time and excellent service so the client choose Xinyue all the time and reach the willing of long-term cooperation.

https://www.xysteelpipe.com/quality-service-is-the-winning-formula-for-constant-orders-from-regular-customers/

Surface treatment of spiral tubes

Spiral pipe derusting and anti-corrosion process:

Derusting is an important part of the anti-corrosion process of spiral welded pipe pipelines. At present, there are many derusting methods, such as manual derusting, sand blasting and pickling and so on. Among them, manual rust removal, mechanical rust removal and painting rust removal (anti-corrosion brushing oil) are relatively common rust removal methods. The following is a brief introduction to the specific operation requirements of these three rust removal processes by welded pipe manufacturers.

1) Manual rust removal

Use scrapers and files to remove the oxide skin and casting sand on the surface of the pipes, equipment and containers, and then use a wire brush to remove the rust on the surfaces of the spiral pipes, equipment and containers, then polish them with sandpaper, and then use cotton silk to remove them. Wipe clean.

2) Mechanical descaling

First remove the oxide skin and casting sand on the surface of the pipe with a scraper and a file; then one person is in front of the rust remover, and one person is behind the rust remover, and the pipe is placed in the rust remover repeatedly to remove rust until the metal color is exposed; brush Before oiling, wipe it again with cotton silk to remove the floating ash on its surface.

3) Anti-corrosion brush oil

Pipes, equipment and container valves are generally subjected to anti-corrosion and oil brushing according to the design requirements. When there are no design requirements, the following regulations shall be followed:

1. Exposed pipes, equipment and containers must be painted with an anti-rust paint first, and then painted with two top paints before handover. If there are requirements for thermal insulation and anti-condensation, two anti-rust paints should be painted;

2. Two coats of anti-rust paint should be applied to concealed pipelines, equipment and containers. The second coat of anti-rust paint must be painted after the first coat of paint is completely dry, and the consistency of the anti-rust paint should be appropriate;

3. When the buried pipeline is used as the anti-corrosion layer, if the construction is carried out in winter, it is advisable to use rubber solvent oil or aviation gasoline to dissolve 30 A or 30 ethyl petroleum asphalt. Two kinds:

① Manual brushing: Manual brushing should be applied in layers, each layer should be reciprocated, criss-crossed, and the coating should be kept uniform without missing or falling;

② Mechanical spraying: When spraying, the sprayed paint flow should be perpendicular to the spraying surface. When the spraying surface is flat, the distance between the nozzle and the spraying surface should be 250-350mm. If the spraying surface is an arc surface, the distance between the nozzle and the spraying surface should be about 400mm. , When spraying, the movement of the nozzle should be uniform, the speed should be maintained at 10 ~ 18m/min, and the compressed air pressure used for spray painting should be 0.2 ~ 0.4MPa.

https://www.xysteelpipe.com/surface-treatment-of-spiral-tubes/

Xinyue Steel supply SSAW Steel pipe for piles in Philippines

Project location：Philippine

Product：SSAW pipe

Standard and material：ASTM A252 Q355B

Specifications：OD2024X12MM OD1824X 12MM

Usage：piling

Inquiry time：2022, 5.12

Order time： 2022 , 6.14

Shipping time：2022. 8.20

Estimated arrival time：2022.9.5

Since January 2018, Xinyue Steel Group has entered the list of suppliers of bridge construction projects in the Philippines, and has actively participated in the design of local bridges, from construction to steel pipe transportation, welding solutions, and continuously providing customers with high-quality services and successful delivery with more than 4,000 tons steel pipes. Xinyue’s successful completion of projects one after another has established a good image and reputation in the field of bridge construction in the Philippines.

This order is from a local contractor in the Philippines. In the middle of 2021, the customer purchased a small batch trial order of similar specifications from Xinyue. The customer gave a good evaluation of the last purchase experience and the quality of the steel pipe, and shared some photos from time to time for project construction site.

This purchase is a piling project for bridge construction. The customer has contracted an 8-kilometer road construction and needs to provide high-standard and high-quality pile pipes. Baosteel is specially designated as the raw material factory. The surface of the steel pipe is sand blasted SA2. 5 with black paint. Based on the previous good supply record, customers are very inclined to purchase from Xinyue.

After half a month’s accounting by engineers, the customer determines the final purchase quantity. At the beginning of June, we had an online conference with the customer to finalize the details of the order .

https://www.xysteelpipe.com/xinyue-steel-supply-ssaw-steel-pipe-for-piles-in-philippines/

Prime Quality products won many orders from Middle East customers

Project Location: UAE

Products: Aluminum sheet / coil

Width: 2000MM;1200M;

Standard: ALLOY 3003

Application: Hotel Construction

Inquiry time:9th Aug, 2022

Purchase time: 12nd Aug, 2022

Estimated Shipping time: 23rd Sep, 2022

Estimated Arrival time: 23rd Oct, 2022

On 9th Aug, 2022, Xinyue received an inquiry from the customer, saying that the hotel project under construction still needed some supplementary materials, the quantity was about one container, the size was 2000MM and 1650MM, and the delivery time was urgent. Xinyue submitted the best price and delivery plan to the customer on the same day. On the second day, the customer replied that our price was about 6% higher than that of the rival, and he asked us to give him a discount. After a short negotiation, Xinyue finally won the order again with a price slightly higher than that of the competitor on 12nd August. Many years of cooperation experience, as well as Xinyue excellent product quality and superior service, is the key to win the orders.

One week after receiving the advance payment, the customer suddenly informed us that due to the urgent need of materials for the project progress, the aluminum sheet with the size of 1650MM could only be purchased locally. He requested to cancel the size of 1650MM and order aluminum coils with other sizes instead.However, at that time, Xinyue has already ordered the raw material and arranged production, but considering the actual situation of the project, we agreed to the customer’s requirement after coordination. The customer is very grateful for our support and highly appreciate our deployment ability.

At present, all the goods have been completed and passed the inspection smoothly. It is expected to be shipped to the port this week and sail to Middle East, and it is expected to arrive at the destination port in late October. We look forward to cooperating with the customer again.

https://www.xysteelpipe.com/prime-quality-products-won-many-orders-from-middle-east-customers/

The development direction of spiral welded pipe

Due to the increasing bearing pressure of the pipeline, the use conditions are becoming more and more severe, and the service life of the pipeline should be extended as much as possible. In order to improve competitiveness, carbon steel pipe manufacturers should research and innovate in what aspects, and what are the main development directions of spiral welded pipes?

(1) Production of large diameter thick-walled pipes to improve pressure resistance;

(2) Design and produce steel pipes with new structures, such as double-layer spiral welded pipes, that is, double-layer pipes are welded with strip steel with half the thickness of the pipe wall, which not only has higher strength than single-layer pipes of the same thickness, but also does not appear brittle failure;

(3) Develop new steel grades, improve the technical level of smelting technology, and widely use controlled rolling and post-rolling residual heat treatment technology to continuously improve the strength, toughness and welding performance of the pipe body;

(4) Vigorously develop coated pipes, such as coating the inner wall of the pipe with an anti-corrosion layer, which can not only prolong the service life, but also improve the smoothness of the inner wall, reduce fluid friction resistance, reduce wax accumulation and dirt, reduce pigging times, and reduce maintenance cost.

The spiral pipe plays a great role in conveying gas and transportation. With the planning and construction of a number of major pipeline projects at home and abroad, high value-added products such as large-deformation pipeline steel, high-strength hot-simmering elbows, and thick-specification low-temperature pipe fittings have shown good market competitiveness and large market demand. However, domestic enterprises are relatively slow in developing this series of products. They should develop high-value-added large-deformation pipeline steel, steel for hot simmering and bending, steel for low-temperature pipe fittings for pipeline stations, and X100 straight seam suitable for industrial applications as soon as possible. Submerged arc welded pipe, spiral seam submerged arc welded pipe and hot simmered spiral welded pipe.

https://www.xysteelpipe.com/the-development-direction-of-spiral-welded-pipe/

Galvanized coil helps Middle East Hotel Construction

Project Location: UAE

Products: Galvanized coil

Specifications: 1500*1.35MM;1200*1.35M

Standard: ASTM A653 DX51D

Application: Hotel Construction

Inquiry time:10th June, 2022

Purchase time: 16th June, 2022

Estimated Shipping time: 30th July, 2022

Estimated Arrival time: 30th Aug, 2022

Today I would like to introduce to you a regular customer from UAE, who is a local trader and has two processing plants. The customer has been purchasing galvanized coils from Xinyue for four consecutive years since 2019 for a local hotel project, which are used together with the aluminum coils and aluminum plates that the customer has been purchasing from our company for the past two years.

The inquiry for this order was sent on 10 June, even the products are similar to the previous order, but we provided the price of thick at 1.35mm and 1.5mm for customer’s reference in the first time as per customer’s inquiry. The wall thickness control and delivery date are strictly in accordance with the customer’s requirements. After a short discussion, the two sides quickly reached an agreement due to the tacit understanding of cooperation for many years, the client chose to place the order with Xinyue even though our price was 3.6% higher than that of our competitor. We received the customer’s PO on June 16 and arranged the advance payment the next day. At present, all products are in production and are expected to be completed and shipped to the destination port by the end of July, so as to catch up with the customer’s delivery date and not delay the project.

https://www.xysteelpipe.com/galvanized-coil-helps-middle-east-hotel-construction/

Xinyue Always Insists On High Quality As The First Guide

Project location：India

Product：EFW Stainless steel pipe

Standard and material：ASTM A789 SS2205

Specifications：19×1.2x3000mm

Application：Heat Exchanger Manufacturing

Inquiry time：Jun, 2022

Order time：Sep, 2022

Shipping time：Oct, 2022

Estimated arrival time：Nov, 2022

The customer is a local machinery manufacturer from India, and it is the first time to cooperate with Xinyue. At the end of June, we received the first inquiry of seamless duplex stainless steel from the customer, we provided two options of sea and land transportation as per customer’s request.

At the end of August, the customer told us that they win the order from end-user, but due to the long delivery time of Xinyue, the customer planned to look for ex-stock in local. Xinyue did not give up. With a small diameter and thin wall thickness, we must ensure the quality of our products, not only delivery time.After repeatedly communicating with the customer, the customer finally accepted to use the welded pipe process to produce the order, which reduced the delivery time to 45 days and saved the cost.

https://www.xysteelpipe.com/xinyue-always-insists-on-high-quality-as-the-first-guide/

Dn700 Psl2 x65qs Bends Shipped Successfully

Project location：Malaysia

Product：SMLS API 5L X65 PSL2 NACE MR-0175 90/45 DEGREES 5D BENDS

Standard and material：API 5L PSL2 X65QS, ISO 15590-1

Specifications：SMLS API 5L X65 PSL2 NACE MR-0175 90/45 DEGREES

Size: 711.2*23.83MM, TANGENT : 1050MM

Inquiry time: 20220602

Order time：20220621

Shipping time：20220820

Estimated arrival time：Sep 2022

At the beginning of June 2022, Tianjin Xinyue received an inquiry from an old customer in Malaysia, it’s pipe bend 5D SMLS API 5L X65 PSL2 NACE mr-0175 90 / 45 degrees source service, size: OD 711.2mm * 23.83mm, standard: ISO 15590.

This order will be officially produced at the end of July after the customer has reviewed the ITP, MPs, heat treatment, hydrostatic inspection, metallographic inspection, penetrate inspection, ball passing inspection and other procedure documents All products have been subject to 100% tempering heat treatment, intermediate frequency bend, physical and chemical (metallographic) inspection and hydraulic inspection as required by the customer. Since August 5, all products have been subject to penetration inspection, ball passing inspection, appearance inspection, dimensional inspection, packaging and spray mark inspection by the third party SGS. After successfully passing all inspections by the third party, all products were packed in the factory on August 11.

https://www.xysteelpipe.com/dn700-psl2-x65qs-bends-shipped-successfully/

Xinyue Steel Pipe Sells Well in Central Asia

Project Location: Kazakhstan

Products: Seamless steel pipe

Standard & Material: GOST 8732-78 Ct20

Specification:159x10x12000MM/ 273x12x12000MM/108x6x12000MM

Application:Gas Transportation

Inquiry time：2022.7.9

Order time：2022.7.11

Shipping time：2022.8.15

Estimated arrival time：2022.9.15

Few years ago, Xinyue cooperated with a group company in Kazakhstan for the first time by virtue of the advantages of payment methods. The company has 6 branches in Kazakhstan. They also have an office in Uzbekistan. Its business involves steel pipe processing, anti-corrosion processing, Stock pipe, bidding, construction and other fields. Due to the distance and production capacity advantages of the Russian market, there has been no new cooperation since 2 orders in few years ago. After then,During these years customers occasionally sent inquiries to Xinyue. The purpose is to compare the prices with other countries. In the absence of order support, many domestic suppliers are not willing to keep quote for the customer. Xinyue has always insisted on giving customers the most advantageous propoals, and Xinyue’s sincerity and service have always been valued by customers. In 2022, when customers are ready to expand Chinese market, Xinyue has become the first reliable supplier recommended by customers and within the group.

Until August this year, Xinyue has successively shipped seamless pipes and galvanized welded pipes of different sizes to customers. The shipping method involves rail, road. Choose the appropriate shipping method according to the real needs of customers. Xinyue actively applies for GOST certification for various types of steel pipes to better support customers.

One minute’s brilliant performance on the stage is attributed to ten years’ practice under the stage. Xinyue has been worked hard on international market for more than ten years. I believe that the time when we on stage in various markets will be perfect. Thanks to every partner who chooses Xinyue, from price, from quality, and finally to service. May all the cooperative relations be smooth and steady.

https://www.xysteelpipe.com/xinyue-steel-pipe-sells-well-in-central-asia/

Hot extrusion technology of seamless steel tube

The hot extrusion process of seamless steel pipe is a pressure forming method, which is to place the tube blank in a pressure-resistant container, and apply external force to cause the tube blank to plastically deform under the state of three-dimensional compressive stress. During extrusion, the tube blank is in a state of three-way compressive stress, so it can obtain a larger plastic deformation than rolling and forging. Depending on the material and extrusion method, the extrusion elongation coefficient can reach 5~500, or even higher. Because the extruded seamless steel pipe has the characteristics of high dimensional accuracy, dense metal structure and stable mechanical properties, hot-extruded seamless steel pipe is widely used in nuclear power, thermal power, petrochemical, aviation, aerospace, transportation and other fields .

Hot extrusion process

Billet preparation → annular furnace preheating → vertical induction furnace heating → glass powder lubrication → vertical press punching (expanding) → phosphorus removal → vertical induction furnace reheating → glass powder lubrication → extrusion → cutting and pressing → cooling

When using hot extrusion technology to produce seamless steel pipes, the broken pipes must be hollow billets. One is a hollow billet for perforating a forged or cast billet, and the other is a hollow billet for centrifugal casting. There are 3 different piercing methods for perforating forging or casting billets according to their steel grades and specifications:

①The solid tube blank is perforated on the vertical perforator;

② Drill a small hole (also called a pilot hole) in the center of the broken pipe in advance, and perform perforation on a pressure perforator;

③ Drill a large hole with a diameter slightly larger than the extrusion core rod in the center of the broken pipe, and send it directly to the extruder for extrusion.

During extrusion, the glass mat between the tube and the extrusion die melts and acts as a lubricant. The outer diameter of the extruded seamless steel pipe depends on the inner diameter of the die hole, and the gap between the mandrel and the die hole determines the thickness of the steel pipe. After the extrusion is completed, the steel pipe is cooled and collected, and subjected to heat treatment and hardcover treatment

https://www.xysteelpipe.com/hot-extrusion-technology-of-seamless-steel-tube/

Xinyue supply marine steel frame project

Project location：Middle East

Product：T-Type Welding & SMLS Pipes

Specifications：OD 273-1219MM, WT 12.7-75MM, L 6000-12000MM

Standard and material：EN10219 EN10225 S355G7/G8+N/MZ35，API 5L X52N PSL2

Usage：Offshore steel structure project

Inquiry time：2022.01.20

Order time：2022.06.05

Shipping time：2022.08.09

Estimated arrival time：2022.08.30

This order is quite difficult for us and our client. The steel grade of steel pipes is high and the quantity is small, the thickest pipe reaching 75mm wall thickness. The customer knew that Xinyue has 40 years of history and experience in the steel industry and was rich in resources, so he specially came to us for help. We found the best inventory plan for the customer at the beginning of receiving the inquiry from the customer, but due to the design change of the end user, the order has not been determined. We have also updated feasible solutions for customers during these times. By the end of May, after the design of the end user was confirmed, the customer directly sent the contract to Xinyue. However, due to four months passed away, the previous inventory has been sold out. In order to help customer complete the project support as soon as possible, we gathered the procurement, planning, production, logistics and other departments to carry out a meeting for detailed resource search and production plan, and set the fastest delivery time of 30 days. The customer was very satisfied and paid a deposit the next day. Now all the pipes have been completed as scheduled and loaded in sailing.

In the production process, we strictly implement each test step. After all the physical, chemical and impact tests of raw steel plates and billets (CNAs laboratory) qualified, then the production of pipes can be arranged. After the completion of the product pipe, the physical, chemical and impact properties of the finished steel pipe were tested. 100% NDT was carried out on the weld area of the T-welded pipe, and all the tests were qualified.

We firmly believe that quality is the best publicity of the enterprise, so for every steel pipe to be delivered to customers, we will ensure 100% qualified. Customer satisfaction is our great driving force; For customer orders, we are try the best. No matter the quantity and difficulty of the customer’s order, we never failed to meet it.

https://www.xysteelpipe.com/xinyue-supply-marine-steel-frame-project/

Supply Duplex Stainless Steel to Middle East

Project location：Middle East

Product：Supper Duplex Stainless Steel Round

Standard and material：ASTM A182 F53/1.4410

Specifications：95*3000;20*3000;120*3000

Usage：Valves parts

Inquiry time：2022, 4.30

Order time： 2022 , 7.7

Shipping time：2022. 8.30

Estimated arrival time：2022.9.30

The order is from the Middle East, and the customer is a local valve production plant. In April 2022, it received the customer’s inquiry for the first time. Xinyue gave full play to its resource integration ability and proposed timely price plans to customers. Because customers do their own processing, the finished products are exported to the United States, Europe and other places.

Compared with other countries, this country has extremely strict requirements on product material and inspection, and requires that PREN should be greater than 40.

In view of this situation, after signing the contract, Xinyue immediately organized various departments to hold a pre-factory meeting to control all details in advance and put forward all the Attention to detail, focused analysis, discussions and solutions.

https://www.xysteelpipe.com/supply-duplex-stainless-steel-to-middle-east/

Xinyue Fully Supports Singapore MRT Project

Project location: Singapore

Product: SSAW steel pipe welded with T + L clutch

Specification: 1800mm x 15meter/18meter

Standard & Grade: EN10219 S355JR

Usage: Metro piling construction

Received the inquiry in June 2021.

Signed the contract on July 21th 2022

Estimated Shipping time: Sep, 2022

It has taken more than one year from the first inquiry to the final order for this project. Due to the single specification and large quantity, the competition has been fierce since the initial quotation. However, this product is the most competitive main product of our group, and we Xinyue has rich experience in welding clutches, we have submitted the customer a very attractive solution since the first bidding.

Besides, the lock of this order is not the common C9 clutch, but the T + L type clutch which needs special welding and customization. The T type part is welded by two steel plates, and the L type part is cut by Angle steel. After repeatedly confirming the design drawing and technical parameters of the clutches, Xinyue issued the final drawing of clutch, and the customer also submitted this drawing to the project end user, and finally obtained the final approval.

Finally, in June this year, after the final consultation between the client and Xinyue, the order for the second phase was confirmed, but due to the long delay of the project, the delivery time was very tight. In order to meet the customer’s delivery date, our company urgently purchased raw materials and get the welding team ready in advance. At this time, the steel pipe is in full production.

https://www.xysteelpipe.com/xinyue-fully-supports-singapore-mrt-project/

What are the precautions for seamless steel pipe production?

Precautions for seamless tube production:

1. Pay attention to whether the thickness of the capillary wall is uniform. If it is found that the thickness of the capillary wall is uneven, the surface polishing treatment must be performed. In addition, whether the inside and outside of the capillary tube is flat and there are no bumps and defects. Once the bumps or defects are found, it should be done in time out processing.

2. For the re-inspection of the capillary, the main work of the re-inspection is to ensure that there are no cracks and defects on the outside of the capillary, check the problems existing in the capillary and make corresponding elimination measures, and be sure to remove the pitting and folding inside the capillary.

3. It is a requirement for the tool. Generally, the tool used for cold drawing has a higher surface finish. Only when the surface finish of the tool is high, the finish of the cold drawn steel pipe will be higher. In addition, the dimensional accuracy and hardness of the mold are also relatively high. Yes. Therefore, it is also very important for us to choose a good abrasive tool in the production, and the phenomenon that the abrasive tool sticks to the steel must not occur.

The production process of seamless steel tube includes the following steps: material preparation – tube blank heating and skew rolling piercing – capillary trimming – thermal expansion deformation sizing – heat treatment – straightening – internal grinding – rectification – External grinding – flaw detection – finishing, final inspection and packaging.

https://www.xysteelpipe.com/what-are-the-precautions-for-seamless-steel-pipe-production/

Xinyue FBE coated steel pipe project to ensure people’s livelihood drinking water in Australia

Project location：Australia

Product：ERW steel pipe and Seamless steel pipe

Standard and material：API 5L GR.B

Specifications：6”, 10”, 12”

Usage：Drinking water pipeline construction project

Inquiry time：2021-10-15

Order time：2021-11-03

Shipping time：2021-12-31

Arrival time：2022-02-06

I met this customer in October 2018. Customer regularly ordered steel pipes for inventory. This order is slightly different from the past. Our customer purchases FBE coated steel pipes with coating of meeting the food level for drinking water pipeline.

After nearly two months of production, the pipes was completed on schedule; Before transportation, the third party carefully inspected the coating, and the data obtained 100% met the customer’s order requirements. During shipment and loading, our company fixes the rope buckle on the surface of the steel pipe to achieve the purpose of protecting coating.

FBE coated steel pipe

FBE coating adopts special fusion bonded epoxy powder coating as film-forming material, which is a thermosetting coating. Before spraying, the steel pipe is derusted and preheated, and then the epoxy powder coating is sprayed on the surface of the steel pipe by electrostatic spraying. The coating is fused and bonded on the surface of the steel pipe to form a coating. The film thickness is 300 ~ 500 μ m. Super strong level can reach 800 μm above. FBE coating has the advantages of strong adhesion to steel, good film integrity, cathodic stripping resistance, soil stress resistance and wear resistance. It can be used as anti-corrosion coating for buried pipeline, underwater pipeline and outer wall of steel pile; It can also be used for anti-corrosion coating on the inner wall of pipelines transporting oil, natural gas, fresh water, seawater or sewage.

https://www.xysteelpipe.com/xinyue-fbe-coated-steel-pipe-project-to-ensure-peoples-livelihood-drinking-water-in-australia/

Xinyue helps the construction of fire safety in Africa

Project location：Africa

Product：Reducing Tee, Concentric Reducer

Specifications：

Reducing Tee 3”x 2”

Concentric Reducer 3”

Standard and material：ASTM A234 WPB

Usage：Pipe connector

Inquiry time：2022.02.15

Order time：2022.02.15

Shipping time：2022.02.30

Arrival time：2022.03.07

This time we want to introduce a regular customer in Africa. At the beginning of 2018, the customer chose Xinyue to cooperate for the first time, and ordered a batch of ERW steel pipe. The comprehensive and considerate service made the customer who feel the sincerity and intention of Xinyue. Of course, good service is only the first step. What really impresses customer is the high-quality products. All test data meet the requirements of the order, and have been well received by third parties and customer. With this good start of this order, no matter what steel products are needed, customer always consider Xinyue as the first supplier.In succession, They also cooperated with our company with pipe fittings,fire pipes with grooved for many times.

In fact, the service is reflected in all aspects. Due to the needs of the project, the customer needs our company to cooperate with the production of some urgent orders. The order this time is that the customer urgently needs a batch of pipe fittings: 2pcs each—Reducing Tee & Concentric Reducer, the products are used for the fire protection system of the building under construction. On the second day of the customer’s inquiry, Customer signed a contract with our company and paid 100% payment at once. Xinyue felt the “urgency” of the customer and immediately arranged the production of raw materials, and finally the customer received the payment within the expected time. The arrival of the goods ensures the smooth implementation of the projects under construction. Trust is generated from cooperation again and again. We are willing to be a solid backing for customers, so that customers can undertake various projects without worries, just like Xinyue’s good vision of “build the world and serve the global”!

Xinyue pipe fittings series products cover flanges, elbows, elbows, tees, reducer, clamps, couplings, etc. our goal is to realize the customer’s one-stop procurement platform. On this platform, customers can collect all kinds of steel products, so as to reduce time cost, improve profit space and win-win situation. Xinyue is definitely your best choice!

https://www.xysteelpipe.com/pipe-fitting-home-xinyue-helps-the-construction-of-fire-safety-in-africa/

Xinyue Steel Participated in Australia Government Metro Project

Project location：Australia

Product：Square tube and round tube

Standard and material：AS1163 C350

Specifications：round tube 1016*20mm

square tube 50mm*50mm*6- 400*400*16mm

Usage：Government Metro

Inquiry time:2021.06

Order time：2021.11

Shipping time：2022.02

Arrival time：2022.03

Depending on its rich experience on exporting projects, Tianjin Xinyue has won the trust of more and more customers. With the continuous rise of performance in recent years, Tianjin Xinyue has gradually gained its own place in the international steel pipe market. It is precisely because of its professional technology and rich experience that Tianjin Xinyue has attracted many new customers to cooperate with Xinyue.

In June 2021, we received an inquiry from a new customer in Australia. The customer reported that this batch of goods would be used for the construction of government subway projects. All suppliers must pass the pre-qualification first. Xinyue submitted the quotation and qualification certificates to the customer at the first time. Meanwhile, our company also shared similar project cases previously with customers and suggested to the customer that the product quality should be inspected by a third-party, so as to protect the rights and interests of customers. For Australian market, Xinyue has absolute confidence. Finally, through many rounds of communications and negotiations, Xinyue broke through the tight encirclement, was recognized by the project terminal. The terminal gladly accepted our product schedule. Finally Xinyue successfully signed this contract.

https://www.xysteelpipe.com/xinyue-steel-participated-in-australia-government-metro-project/

A brief introduction to Check Valve

 Size range:2''-36'' inches

Pressure: PN10/PN16/ 125PSI/150PSI

Working dimensions: DN50-DN600

Material:

The body material: DI/ CI/ Cast steel

The seat material: Rubber/ bronze/brass

Standard:

DIN3202-F1, ANSI, BS4504

DIN/BS/EN/API600/Russian Standard , ANSI Y-Strainer

Application:

Check valve is suitable for the transportation of Water, Steam, Oil etc.

Coating: FBE Powder Coating or Akzo Nobel Powder Coating, per customer’s requirement

For more info about Check Valve, feel free contact us anytime.

http://www.tjxysteel.com/news/A-brief-introduction-to-Check-Valve-258.html

Method of galvanizing seamless pipe

 There are two types of galvanizing methods for seamless tubes: hot-dip galvanizing and electro-galvanizing. Hot-dip galvanizing includes wet method, dry method, lead-zinc method, redox method, etc. The main difference between different hot-dip galvanizing methods is what method is used to activate the surface of the pipe body after acid dip cleaning of the steel pipe to improve the quality of galvanizing. The dry method and redox method are mainly used in the production.

1. Hot-dip galvanized seamless tube

The hot-dip galvanized seamless tube is made by reacting the molten metal with the iron matrix to produce an alloy layer, so that the matrix and the coating are combined. Hot-dip galvanizing is to pickle the steel pipe first. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned in the tank of ammonium chloride or zinc chloride aqueous solution or mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to the in the hot dip bath. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. It is widely used in gas pipelines, natural gas pipelines, heating pipeline systems, and some outer wires of galvanized steel pipes are also used in hot water pipe network systems and domestic drainage systems.

2. Cold galvanized seamless tube

Cold galvanizing is electro-galvanizing. The amount of galvanizing is very small, only 10-50g/m2. Its corrosion resistance is much different than that of hot-dip galvanized pipes. In order to ensure the quality, most regular galvanized pipe manufacturers do not use electro-galvanized (cold plating). Only those small enterprises with outdated equipment use electrogalvanizing, and of course their prices are relatively cheap. At present, cold galvanized pipes have been banned from being used as water and gas pipes.

3. The difference between hot and cold galvanized tubes

Hot-dip galvanized seamless tube: complex physical and chemical reactions occur between the steel pipe matrix and the molten plating solution to form a corrosion-resistant zinc-iron alloy layer with a tight structure. The alloy layer is integrated with the pure zinc layer and the steel pipe matrix. Therefore, it has strong corrosion resistance.

Cold galvanized seamless tube: The zinc layer is an electroplating layer, and the zinc layer is independently layered with the steel pipe substrate. The zinc layer is thin, and the zinc layer is simply attached to the steel pipe substrate and is easy to fall off. Therefore, its corrosion resistance is poor. In newly built houses, it is forbidden to use cold galvanized steel tubes as water supply pipes.

https://www.xysteelpipe.com/method-of-galvanizing-seamless-pipe/

A brief introduction to Ball Valve

 Size range and Pressure:

ANSI Ball Valve: SIZE 1/2"~48" , Class150- Class 250

BS Ball Valve: DN50 -DN350, PN16~PN40

DIN Ball Valve: DN50-DN600, PN16~PN160

JIS Ball Valve: DN50-DN600 10K~63K

Specification:

EN1092-2 PN10/PN16/PN25, ANSI B16.1 Class125, ANSI B16.2 Class250, BS10 Table D/E, JIS 10K/16K

Application:

Water, Oil, Gas, corrosive liquid usage

For more info about Ball Valve, feel free contact us anytime.

http://www.tjxysteel.com/news/A-brief-introduction-to-Ball-Valve-257.html

A brief introduction to Butterfly Valve

Size range: 2 to 48 inches (DN50 to DN1200)

Pressure:

PN10-PN16 /Class 125, Class150

Specification:

EN1092-2 PN10/PN16/PN25, ANSI B16.1 Class125, ANSI B16.2 Class250, BS10 Table D/E, JIS 10K/16K

Application:

Water, Oil, Gas, corrosive liquid usage

For more info about Butterfly Valve, feel free contact us anytime.

http://www.tjxysteel.com/news/A-brief-introduction-to-Butterfly-Valve-256.html

A brief introduction to gate valve

 Size range: 2 to 40 inches (DN40 to DN1000)

Specification:

ASME B16.10, BS5163, DIN3202 F4, DIN3202 F5, BS EN558-1

Pressure: PN10/PN16/PN25, Class125 to Class250

Body and bonnet Material :

GG25 / GGG40; ASTM A126 ClassB, HT250; ASTM A536 65-45-12, 550-7;

Suitable for : Water, oil and gas application

For more info about gate valve, feel free contact us anytime.

http://www.tjxysteel.com/news/A-brief-introduction-to-gate-valve-255.html

A brief introduction to WN Flange

 WN flange, which is short for weld neck flange, is widely used for oil and gas field, offshore construction, water supply system, shipment building, power station, pipeline project, etc.

Size range: 1/2 to 56 inches (DN15 to DN1400)

Pressure: ANSI class 150 to 2,500

Materials: carbon steel, stainless steel, alloy steel

Standards: API, ANSI, BS, JIS, UNI, MSS and SP

Steel specification:

ASTM A105

ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2

ASTM A516.60

ASTM A694 (F42, F46, F48, F50, F52, F56, F60, F65, F70)

ASTM A182 F304/304L, F316/316L, F316H, F310, F321

ASTM A182 F11, F22,

For more info about weld neck flange, feel free contact us anytime.

http://www.tjxysteel.com/news/A-brief-introduction-to-WN-Flange-253.html

A brief introduction to RF Flange

 Size range: 1/2"- 56" inches

Materials: carbon steel, stainless steel, alloy steel

Standard and steel grade:

ANSI B16.5 Class150 , Class300, Class600, Class900

BS4504, PN10, PN25, PN40

DIN2576, PN10, PN25, PN40

JIS 5K 10K 16K 40K

ASTM A105, C22.8, ST37.2, SS304, 304L , SS316, 316L

For more info about socket welding flange, feel free contact us anytime.

http://www.tjxysteel.com/news/A-brief-introduction-to-RF-Flange-252.html

Measures to improve the accuracy of seamless pipe wall thickness

 The control of the wall thickness of the steel pipe is a difficult point in the production of the steel pipe. The measures to improve the accuracy of the wall thickness of the seamless tube in the production mainly include the following aspects:

1. Tube billet heating

The heating should be uniform, and it is forbidden to rapidly increase or decrease the temperature. Each time the temperature rise and fall should be kept steady and slow, and the maximum rise and fall temperature should not exceed 30℃.

2. Centering roller

Determine whether the centering roll is installed in place, adjust the center, opening angle and opening size of each action of the relevant core roll to be consistent, and the center of the core roll should be on the rolling line.

3. Rolling center line

Ensure that the rolling center line of the piercing machine is consistent with the center line of the piercing trolley, and avoid “up rolling” or “down rolling”, so that the tube blank can be uniformly stressed during piercing.

4. Rolling tools

For the worn plugs, guide plates, rolls and other rolling tools, they should be replaced in time.

5. Installation of rolling tools

The center of roll distance and lead distance must be on the rolling line. Ensure that the center line of the lead distance and the roll distance is on the center line of the piercing and rolling, that is, the upper and lower roll distances are equal, and the left and right lead distances are equal.

6. Perforated ejector

The perforated ejector rod is generally selected as a thick-walled pipe with an outer diameter of Φ108mm-Φ114mm, a wall thickness of ≥25mm and a uniform wall thickness.

7. Rolling mandrel

The mandrel should be processed by a thick-walled tube with a thicker wall. For a mandrel with a smaller size, a solid billet can be used instead. Thick-walled pipes and solid billets with uniform wall thickness can greatly reduce the probability of bending deformation of the mandrel, and can effectively improve the wall thickness accuracy of the steel pipe.

8. The accuracy of the mandrel

The length and slenderness of the mandrel is relatively large. Generally, the outer diameter is first turned and then the opening is welded, or the long material is directly turned and formed. The external machining accuracy of the mandrel is controlled within ±0.1mm, and the straightness deviation of the mandrel does not exceed 5mm. When welding, a precision-machined pin is inserted between the two mandrels for positioning to prevent excessive deviation of the overall straightness caused by welding.

9. Improve the craftsmanship

Improve the process to prevent the thinning in the middle and the increase of the wall thickness from exceeding the control range, and improve the accuracy of the wall thickness.

https://www.xysteelpipe.com/measures-to-improve-the-accuracy-of-seamless-pipe-wall-thickness/

A brief introduction to Socket Welding Flange

 Socket Welding Flange (SWRF)

Materials: Carbon Steel, Stainless Steel, Alloy Steel

Size range? 1/2 to 64inches (DN15 to DN1,600mm)

Pressure: ANSI class 150 to 2,500

Application: Oil field, water supply system, offshore construction, ship building, natural gas pipeline fitting, pipe project, electric power, etc.

Standards:

API, ANSI, BS, JIS, UNI, MSS and SP

Steel Grades:

ASTM A105

A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2

A516.60

A694 (F42, F46, F48, F50, F52, F56, F60, F65, F70)

A182 F304/304L, F316/316L, F316H, F310, F321

A182 F11, F22,

For more info about socket welding flange, feel free contact us anytime.

http://www.tjxysteel.com/news/A-brief-introduction-to-Socket-Welding-Flange-251.html

A brief introduction to Plate Flange

 Carbon steel Plate Flange, stainless steel Plate Flange, alloy steel Plate Flange.

Size range: 1/2"- 56"

Standard specification:

ANSI B16.5 Class150 , Class300, Class600, Class900

BS4504, PN10, PN25, PN40

DIN2576, PN10, PN25, PN40

JIS 5K 10K 16K 40K

ASTM A105, C22.8, ST37.2, SS304, 304L , SS316, 316L

http://www.tjxysteel.com/news/A-brief-introduction-to-Plate-Flange-250.html

A brief introduction to Thread Flange

 Thread Flange, Screw Flange, NPT Flange

Size range: 1/2 to 6 inches (DN 15 to DN 150)

Pressure range: ANSI class 150 to 600

Surface Treatment: Black Coating, Color Coating, Hot Dipped Galvanized, or per customer

Standard: ANSI B16.5, BS4504, EN1092-1, DIN

Materials:

ASTM A105, A350 LF2 (CS)

ASTM A182 F304/304L, F316/316L, F316H, F310, F321 (SS)

ASTM A182 F11, F22 (AS)

For more info about carbon, stainless steel, and alloy thread flange, you can contact Xinyue online directly, our send your questions to Contact Us---Email. We’ll be at your service.

http://www.tjxysteel.com/news/A-brief-introduction-to-Thread-Flange-249.html

Flattening test of seamless steel pipe

 The production process of seamless steel pipes is relatively cumbersome and rigorous. After the seamless steel pipe is produced, certain tests must be carried out. Do you know the flattening test method and steps of the seamless steel pipe?

1) Flatten the sample:

1. The sample is cut from any part of the seamless steel pipe that has passed the visual inspection, and the sample should be the full-face pipe section of the pipe product.

2. The length of the sample should not be less than 10mm, but not more than 100mm. The edges of the specimen may be rounded or chamfered by filing or other methods. Note: If the test results meet the test requirements, the edges of the sample may not be rounded or chamfered.

3. If it is to be carried out on the end of a full-length tube. During the test, the incision shall be made perpendicular to the longitudinal axis of the pipe at the length of the sample from the end face of the pipe, and the cutting depth shall be at least 80% of the outer diameter.

2) Test equipment:

The test can be carried out on a universal testing machine or a pressure testing machine. The testing machine shall be equipped with two upper and lower parallel platens, and the width of the parallel platens shall exceed the width of the flattened sample, that is, at least 1.6D. The length of the pressing plate is not less than the length of the sample. The testing machine has the ability to flatten the sample to a specified pressure value. The platen should have sufficient stiffness and be able to control the speed range required for the test.

3) Test conditions and operating procedures:

1. The test should generally be carried out in the room temperature range of 10°C ~ 35°C. For tests requiring controlled conditions, the test temperature shall be 23°C ± 5°C. The flattening speed of the sample can be

20-50mm/min. When there is a dispute, the moving speed of the platen should not exceed 25mm/min.

2. According to the relevant standards, or the agreement between the two parties, the distance H of the platen should be determined.

3. Place the sample between two parallel platens. The welds of welded pipes should be placed in the positions specified in the relevant products and standards. Use a press or a testing machine to apply a force in the radial direction, and at a speed of not more than 50mm/min, evenly press to the flattening distance H, remove the load, remove the sample, and visually observe the bending part of the sample.

Precautions:

During the flattening test, the flattening distance H shall be measured under load. In the case of closed flattening, the width of the contact between the inner surfaces of the sample should be at least 1/2 of the inner width b of the standard sample after flattening.

The flattening performance test of seamless steel pipe plays an important role in the hardness, melting point, corrosion resistance and pressure of seamless steel pipe, and this test should be done well.

https://www.xysteelpipe.com/flattening-test-of-seamless-steel-pipe/

Galvanizing process of square and rectangular tubes

 A) What are the two galvanizing processes for square and rectangular tubes?

Galvanized square tube, also known as galvanized square tube, is a square tube that has been galvanized. According to different production processes, galvanized square tube can be divided into two types: hot-dip galvanized square tube and cold-galvanized square tube:

1. Hot-dip galvanized square tube

It is a galvanized square tube formed after a series of chemical reactions by placing the square tube in a hot-dip galvanizing bath after being crimped and formed by a steel plate or a steel strip. There are many kinds of hot-dip galvanizing methods, such as wet method, dry method, lead-zinc method, redox method, etc. The main difference between different hot-dip galvanizing methods is what method is used to activate the surface of the pipe body to improve the quality of galvanizing after the steel pipe is acid dipped and cleaned. In the production, dry method and redox method are mainly used.

2. Cold galvanized square tube

Also known as electro-galvanized square pipe, it is to put the made square pipe into the electrolyte, the liquid contains zinc, after electrification, the electroplating operation is carried out, and the zinc powder or galvanized coating and the steel of the square pipe are fully contact to form a galvanized layer.

B) What is the difference between hot dip galvanized square pipe and cold galvanized square pipe?

The main difference between hot-dip galvanized square pipe and cold-dip galvanized square pipe lies in the different production processes. In addition, there are also certain differences in appearance, use, price, etc.

1. Different appearance

The appearance of the cold galvanized square tube is relatively smooth and bright.

The angle is slightly colorful; the appearance of the hot-dip galvanized square pipe is slightly rougher than the cold-galvanized square pipe, and it is silver-white, and the appearance is prone to process water lines and a little dripping tumor, especially in the process of production.

One end of the piece is more obvious.

2. Different anti-corrosion properties

Compared with hot-dip galvanized pipe, cold-dip galvanized pipe has worse corrosion resistance, and the corrosion resistance of hot-dip galvanized pipe is dozens of times that of cold-dip galvanized pipe.

3. Different uses

Hot-dip galvanized square and rectangular pipes are mainly used in curtain walls, construction, machinery manufacturing, solar power generation brackets, steel structure projects, etc., especially in curtain walls and buildings, which are widely used;

Cold galvanized square tube is characterized by high strength and light structure, and is mainly used in general occasions.

4. Different prices

Under the same thickness and size, the price of hot-dip galvanizing is more expensive than that of cold-galvanizing. This is because the cold-galvanized square tube only needs to be plated on one surface, and the whole square tube must be plated with respect to the hot-dip galvanized square tube.For galvanizing, the production cost is naturally lower.Of course, although the difference between the hot-dip galvanized square tube and the cold-dip galvanized square tube is relatively large, there is actually no difference between the two, and the appropriate square tube can be selected mainly according to the actual needs.

https://www.xysteelpipe.com/galvanizing-process-of-square-and-rectangular-tubes/

A brief introduction to RTJ Blind Flange

 RTJ blind flange, which is short for ring-type joint blind flanges, is widely applied in oil field, water system, offshore construction, ship manufacturing, sewage treatment, natural gas pipeline system, power plant, etc.

Xinyue can provide size range form 1/2” to 56”, DN 15 to 1400. Pressure of ANSI class is from 150 to 2500.

Most common seen standard is API, ANSI, BS, JIS, UNI, DIN, EN1092-1.

Most common seen material are as below:

ASTM A105

ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2

ASTM A516.60

ASTM A694 (F42, F46, F48, F50, F52, F56, F60, F65, F70)

ASTM A182 F304/304L, F316/316L, F316H, F310, F321

ASTM A182 F11, F22

http://www.tjxysteel.com/news/A-brief-introduction-to-RTJ-Blind-Flange-248.html

Do you really know about Flange?

 Flange can be devided into many kinds, today we’ll talk about the classification of flanges.

Most common seen flange are as below:

1. RTJ Blind Flange

2. WN Flange

3. RF Flanges

4. Thread Flange

5. Plate Flange

6. Socket Welding Flange

7. Slip on Flange

8. Spade flange & Spacer ring Flange

9. Orifice Welded Neck Flanges

Xinyue Steel Group can provide all above flanges, size range of flange is from 2” to 96”, and we can manufacture carbon flange, stainless flange and alloy flange. For more info about flange, you can contact Xinyue anytime, we’ll provide more professional info for you online.

http://www.tjxysteel.com/news/Do-you-really-know-about-Flange-247.html

Long lifespan of ERW steel pipe

 What should we pay heed to when we are about to buy ERW steel pipes? Of course, quality is the first factor we should focus on, then comes the price we should pay attention to, but there is also another factor we should pay attention to-- lifespan of the pipe.

Long service life would be an important factor for a kind of ERW steel pipe when it applied in engineering project as this means saving money to fix it and change it.

Steel pipe, used in water, oil and gas transportation, is necessary to have a relative long lifespan.

As there are advantages for long lifespan: first of all, we should know that it would cost human resource as well as cost if we have to change it often. What’s more, it would influence the basic usage for customers if we change it often which would damage the whole process for customers sometimes.

Plastic or wood pipes would not so strong for the vehicles’ weight when we use them underground. So that steel pipe, with its hardness, is the top choice for this situation. Of course, because of the external corrosion and internal abrasion. The service life of steel pipes would be increased by the usage of proper coating and cathodic protection. With attention to coatings and cathodic protection, the service life of steel pipe can be extended indefinitely.

http://www.tjxysteel.com/news/Long-lifespan-of-ERW-steel-pipe-443.html

Why are there pores in the welds of welded steel tubes?

 Welded steel tube weld pores not only affect the tightness of the pipeline weld and cause pipeline leakage, but also become the induction point of corrosion, which seriously reduces the strength and toughness of the weld.

The factors that cause porosity in the weld are: moisture, dirt, oxide scale and iron filings in the flux, welding components and covering thickness, surface quality of the steel plate, treatment of the edge of the steel plate, welding process and steel tube forming process.

Measures to prevent porosity in welded steel tubes:

1) Flux composition: When the welded steel tube contains an appropriate amount of CaF2 and SiO2, it will react and absorb a large amount of H2 to generate HF with high stability and insoluble in liquid metal, which can prevent the formation of hydrogen pores.

2) The accumulation thickness of the flux is generally 25-45mm. The maximum value of the accumulation thickness of the flux with large particle size and small density, and the minimum value otherwise; the maximum value of the accumulation thickness of high current and low welding speed, and the minimum value otherwise. In addition, in summer or when the air humidity is high, the recovered flux should be dried before use.

3) Surface treatment of steel plate: In order to avoid sundries such as oxide scale falling off from uncoiling and leveling from entering the forming process, a plate surface cleaning device should be installed.

4) Steel plate edge treatment: rust and burr removal devices should be installed at the edge of the steel plate to reduce the possibility of pores. The position of the removal device is best installed after the edge milling machine and the disc shear. The structure of the device is two active wire wheels with adjustable gaps at the upper and lower positions on one side, which press the edge of the plate up and down.

5) Weld profile: the forming coefficient of the weld is too small, the shape of the weld is narrow and deep, the gas and inclusions are not easy to emerge, and it is easy to form pores and slag inclusions. Generally, the welding seam forming coefficient is controlled at 1.3-1.5, the maximum value for thick-walled welded tubes, and the minimum value for thin-walled tubes.

6) Reduce the secondary magnetic field: In order to reduce the influence of magnetic bias blowing, the connection position of the welding cable on the workpiece should be close to the welding terminal, so as to avoid the secondary magnetic field generated by some welding cables on the workpiece.

7) In terms of technology: the welding speed should be appropriately reduced or the current should be increased, so as to delay the crystallization speed of the weld pool metal, so as to facilitate the escape of gas; at the same time, if the delivery position of the strip is unstable, it should be adjusted in time to prevent frequent passes. Fine-tuning the front or rear axle maintains shape, making it difficult for gas to escape.

Welded steel tube refers to a steel pipe made of steel plate or strip steel after being crimped and welded, generally with a fixed length of 6 meters. The production process is simple, the production efficiency is high, the cost is low, and the development is fast, but the strength is generally lower than that of seamless steel pipes.

https://www.xysteelpipe.com/why-are-there-pores-in-the-welds-of-welded-steel-tubes/