Welcome Kuwait contractor to visit XINYUE STEEL

 Xinyue Steel Pipe is selling well all over the world. In October 2018, our Tianjin Xinyue Steel ushered in a visit by a Kuwaiti contractor and signed a contract.

During this trip, Mr. Mohammad visited our headquarters and factory. The two parties gave a comprehensive introduction and communication to each other at the meeting, which improved mutual understanding of each other. From the production equipment, production process, testing, packaging, inventory, etc, a series of quality control systems are particularly praised and show a strong long-term cooperation interest.

In the case of accreditation of the quality and company strength, we directly cut into the topic to talk about the order, we discussed the price, delivery, payment method, shipping plan, etc., according to the requirements of the guests, we gave multiple solutions. After a thorough negotiation between the two parties, all the concerns of Mr. Mohammed were answered satisfactorily and the order was confirmed directly on site.

Under the full recognition of our company, Mr. Mohammed also offered to purchase all the fitting pipes and also considered to cooperate with our company, and immediately start to visit our fitting pipe factory, Mr. Mohammad get a comprehensive and systematic understanding of the process and equipment of the fitting pipe and quality control. Combined with the standards and requirements of his own application, put forward the recommendations, our company will fully meet the requirements of customers, to provide quality products for each guest.

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Exhibitions Xinyue Steel Attended in 2018

 The world’s leading trade fair wire and tube hold jointly for the 16th time at the Dusseldorf Exhibition Centre from 16 to 20 April 2018. Which is the world’s number one events for the wire, cable and tube industries.

With 16 years of experience, Tube China also has grown into Asia's most influential, and the world's second most influential tube and pipe industry event. Concurrently held with wire China, Tube China 2018, from 26th to 29th September at Shanghai International New Expo Centre.

As the leading steel pipe manufacturing and exporting company, this valuable chance sure will be in hand by Xinyue People, we value every chance to communicate with customers face to face, so that clients can feel our professionalism, passion and sincere, to give them the best service.

After the date confirm with the regular customers in advance, Xinyue people come to Shanghai with great passion, in order to communicate with Xinyue’s customer face to face, and let our customer feel that we always here waiting for them, and looking forward the further cooperation.

During these days, Xinyue people visited some regular clients from Germany, Egypt ect. One customer from Singapore signed the contract with us here in the fair, which is exporting yo Vietnam. We Xinyue Steel also looking forward to cooperate with you ! Welcome to Xinyue !

At the Dusseldorf Exhibition Centre, Xinyue people serve the customers from all over the world, with all our professionalism, passion and sincere, made all customers feel satisfied with Xinyue Group, and one of the company who visited us and confirmed the order contract with us by the table, after hours communication and known more about Xinyue Steel, they finally signed the contract with us, and made the bank transfer the next day. That’s Xinyue people, Xinyue Steel, who touch every customer by our professionalism, passion and sincere, make every customer believe in us, and willing to establish long term business relationship with us Xinyue Steel.

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ERW Pipe vs SMLS Pipe

 Comparison of ERW pipe and seamless pipe (SMLS):

(1) Superior tube blank quality

Compared with the tube blank of SMLS steel pipe, the design of chemical composition of high frequency welded pipe (ERW) is more scientific and reasonable.

ERW special steel grades are characterized by high purity. Through de-S, de-P, degassing, Ca treatment and other methods, the content of S and P can be controlled below 0.005%, the content of N can be controlled below 0.008%, the shape of inclusions can be controlled to be spherical, and the number of inclusions can be greatly reduced . The C content is controlled below 0.1%, so that the welding including the construction process of girth welding has good welding performance, and the increase in strength is to prevent the growth of austenite grains by adding trace alloying elements such as Nb, V, and Ti. At the same time, gap strengthening is increased to improve the toughness and strength of the steel. The tube blank of SMLS steel pipe is generally made of A3, #20 steel, 16Mh and other materials. The purity of the material is poor, and the C content is high, generally around 0.2%, which is not conducive to the girth welding in construction. The strength is acceptable, but Poor toughness.

Another major difference between ERW steel pipe blanks and SMLS steel pipe blanks is that the former is made of hot-rolled steel strips by cold rolling, while the latter is formed by perforating round steel in a hot-rolled state. Obviously, the grain size and the weave density of the SMLS tube blank formed in the hot rolling state are quite different from those of the ERW tube blank, and the properties that can be caused by this must also be very different.

(2) Advantages of geometric size

No matter from the comparison of the data or the comparison of the measured data in the data, the dimensional accuracy of ERW steel pipe is higher than that of SMLS. This is because the seamless pipe is formed by continuous perforation of the round steel in the hot rolling mill, while the ERW steel pipe is formed from the steel strip in the cold rolled state. In contrast, ERW is easier to implement than SMLS in terms of external dimensions. Because of this, the appearance quality of ERW steel pipe has fewer defects, and the appearance quality is also better than that of SMLS steel pipe.

In addition, due to the use of the computer flying saw, the precision of the fixed-length rate and the fixed-length length of the high-frequency welded pipe is high.

Since the high-frequency welded pipe is made of hot-rolled steel strip with high rolling precision, its thickness is easy to control, and the steel pipe with thinner wall thickness and higher steel grade can be produced according to the design requirements. For example, after several repeated demonstrations, the pipes used in the West-East Gas Pipeline Project are basically determined to use X70 steel grade, with a wall thickness of 14.7mm and Ф1016mm. The steel grade is increased, the wall thickness is reduced, and the project investment is relatively reduced, about 5 billion yuan . The wall thickness of seamless pipes is often limited by perforation technology and production costs, and thin-walled steel pipes are very difficult.

https://www.xysteelpipe.com/erw-pipe-vs-smls-pipe/

Xinyue coating pipeline order is booming

 At recent years, we have received more and more coating pipe orders from country of Africa, South-east Asia, south American, middle east and others. And our coating pipes has won high reputation from our end users.The coating type of most of our coating pipe orders are epoxy paint, epoxy coal tar, FBE and 3lpe, and a few are 3PP, polyurethane etc.+

Xinyue has always pay special attention to guarantee the quality of coatings, 3PE / 3PP technology has been very mature and always received good reputation, about epoxy liquid paint orders, Xinyue has always attached great importance and strictly control details to following key steps:

1. Choose good quality paint like famous brand HEMPEL, JOTUN, INTERNATIONAL or chinese local famous brand.

2. Strict shot blasting to move the greasy dirt , rust and mill scale etc for reaching good cleanliness level and great profile and surface preparation meet SA 2.5/s. A 3.0;

2. Environmental conditions temperature and humidity must meet the requirements of painting condition, especially protection from moisture.

3. fully curing;

4. Carrying out all related tests strictly as the standard request, such as holiday test and tensile test etc.

As the famous pipeline suppliers from China, Xinyue’s goal is to serve for the global market and build the world getting better, warmly welcome to send us inquiry at any time.

http://www.tjxysteel.com/news/Xinyue-coating-pipeline-order-is-booming-631.html

Attention to detail for air export

 All countries have strict control the import and export of air transport, and they need to handle various complicated procedures. Air freight forwarding companies need to deal with many details in the process of international air cargo logistics. The following is the experience of several air export exports from Tianjin Xinyue Industrial and Trade Co.,Ltd.

Basic requirements of airlines for the outer packaging of goods

Packaging requirements, the goods cannot exposed, should firm and meet international transport standards. Wooden boxes are best for exporting (such as plywood, mixed boards etc.). It is best not to use wooden boxes made of logs. Many countries have restrictions on logs wooden boxes. Extra large pieces which gross weight is equal to 60KG, must hold in order to use the forklift. The pallet should be flat on the ground.

Determine the quantity of goods

The number of pieces of goods should be guaranteed before the goods arrive at the airport! This is related to the speed of the warehouse and the workload of the airport. The number of items provided by the general cargo owner is not accurate, and the operator can re-implement the exact number of pieces of the goods after the goods are delivered or as soon as possible. Whether the number of pieces is accurate or not affects whether the written air label is valid.

Palletize

The outer packaging of the goods. When booking, you should pay attention to whether the single piece of goods is a large piece of goods. (If the gross weight of a single piece is more than 80KG, you must palletize), or make an appointment with the airport in advance.

Tianjin Xinyue Industrial and Trade Co.,Ltd has rich experience in sea, land and air transportation, providing with the most comprehensive service for you.

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Xinyue Steel Pipe Accept Any Third Party Inspection

 "Build the world, serve the globe" is not an empty slogan, this is tianjin xinyue steel group culture and vision.In the process of our growth, we always believe that as long as adhering to the principle of integrity first, service best, we will be able to get the trust of global customers.

At the end of October 2018, Xinyue Steel successfully won the production order of 2,150 tons of steel pipes. After more than a month of raw material procurement, the formulation of the production schedule, and the production and welding of steel pipes. Xinyue successfully completed the production of the first batch of orders.

After the customer's third-party testing company’s 8 hours inspection, with all quantity, quality and other requirements tested ok, all the first batch of 36 units steel pipes were successfully hoisted on board and ready to depart to the customer's construction site!

In the production process of any order, we will determine the traceability of each data, at the same time, we will make full control of the production supervision.Only by being responsible to our customers we can maintain a long-term cooperative relationship in our cooperation.It is also because of the company's strict system and strict process operation, we are confident in each shipment of goods.

After the shipment to the project, we will also visit the project site according to the requirements from the customer, inspect the site situation and provide the customer with the best after-sales service.

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Surface defect inspection of square and rectangular tubes

There are five main methods for detecting surface defects of square and rectangular tubes:

1. Eddy current inspection

Eddy current testing includes basic eddy current testing, far-field eddy current testing, multi-frequency eddy current testing, and single-pulse eddy current testing. Using the eddy current sensor to magnetically induce metal materials, the type and shape of the surface defects of the rectangular tube will cause different types of data signals. It has the advantages of high inspection accuracy, high inspection sensitivity, and faster inspection speed. It can inspect the surface and lower layers of the tested pipe, and is not harmed by residues such as oil stains on the surface of the tested square steel pipe. The disadvantage is that it is very easy to distinguish flawless structures as flaws, the false detection rate is high, and the inspection screen resolution is not easy to adjust.

2. Ultrasonic testing

When ultrasound enters an object and hits a flaw, a portion of the sound frequency creates a reflective surface. The multi-purpose function of receiving and sending can analyze the reflected surface wave, and can detect the faults accurately and accurately. Ultrasonic testing is commonly used in the inspection of steel castings. The inspection sensitivity is high, but the complicated pipeline is not easy to inspect. It is stipulated that the surface of the rectangular tube to be inspected has a certain degree of gloss, and the gap between the camera and the inspected surface is blocked with a silane coupling agent.

3. Magnetic particle inspection method

The basic principle of the magnetic particle inspection method is to complete the electromagnetic field in the raw material of the square steel pipe. According to the interaction between the defect leakage electromagnetic field and the magnetic particle inspection, when there is discontinuity or defect in the surface layer or near-surface layer, the magnetic field line will be partially deformed where there is no continuity or defect, resulting in a magnetic field. Its advantages are less investment in machinery and equipment projects, high stability and strong image. The defect is that the actual operation cost increases, the defect classification is inaccurate, and the inspection speed is relatively slow.

4. Infrared detection

According to the high-frequency magnetic induction electromagnetic coil, induced electromotive force is caused on the surface of the square tube. The induced electromotive force will cause the disadvantaged area to consume a lot of electromagnetic energy, causing the temperature of some parts to rise. Use infrared induction to check the temperature of some parts to identify the depth of the defect. Infrared sensors are generally used for the inspection of surface defects, and the discomfort is used for the inspection of irregular metal materials on the surface.

5. Magnetic flux leakage inspection

The magnetic flux leakage inspection method is very similar to the magnetic particle inspection method, and its application field, sensitivity and stability are stronger than the magnetic particle inspection method.

https://www.xysteelpipe.com/surface-defect-inspection-of-square-and-rectangular-tubes/

Degreasing and pickling passivation of carbon steel tubes

 For carbon steel pipe (CS pipe), it should be degreased first and then pickled, because grease is insoluble in acid solution. If pickling is performed first, neither the oil stains nor the rust covered by the oil stains can be removed.

Degreasing pickling method for carbon seamless steel pipe:

At present, the tank immersion method is often used in construction, and the liquid level exceeds the outer surface of the pipe by more than 50mm during immersion. Since the oxygen pipeline needs to be treated by degreasing, pickling and passivation, four tanks are generally made according to the actual diameter of the pipe used. That is, degreasing tank, pickling tank, neutralization tank, passivation tank. The oxygen pipeline degreasing and pickling process is: degreasing→water washing→pickling→water washing→neutralization→passivation→water washing→drying.

1. Degreasing

The formula of the degreasing solution is as follows: each liter of the solution contains 20g-30g of sodium hydroxide, 35g-50g of sodium nitrate, and 3g-5g of sodium silicate. The operating process requirements are: the liquid temperature is 70 ℃ ~ 80 ℃, the soaking time is determined by the test method according to the amount of oil on the surface of the pipe, generally about 10min ~ 40min. The heating method can be steam. Degreasing parts shall be inspected by any of the following methods. (1) Wipe the surface of the degreased part with clean and dry white filter paper, if there is no trace of grease on the paper, it is qualified. (2) Use 100% camphor below 1mm to check the condensate to flush the condensate, and it is qualified to keep rotating. (3) Check the surface of the degreasing part with ultraviolet rays with a wavelength of 3200-3800 angstroms, and the grease-free fluorescence is qualified. After degreasing treatment, the oil pollution on the pipe surface can be removed.

2. Water flush

Rinse with clean water with a pressure of 0.8MPa.

3. Pickling

Pickling is the use of acid solution to remove scale and rust on the surface of cs seamless pipes. The oxides of iron (Fe3O4, Fe2O3, FeO, etc.) such as scale and rust react with the acid solution to form salts that are dissolved in the acid solution and removed. The most commonly used pickling is sulfuric acid and hydrochloric acid. The formula of sulfuric acid solution is: the concentration of sulfuric acid solution is 5% to 10%. The operating process requirements are: temperature 60℃~80℃, soaking for 5min~20min. The formula of the hydrochloric acid solution is: the concentration of the hydrochloric acid solution is 5% to 20%. The operating process requirements are: temperature 20℃~50℃, soaking for 5min~20min. After the pipeline is pickled, check that the surface rust is removed, and the exposed metallic luster is qualified.

4. Water flush

Rinse with clean water with a pressure of 0.8MPa.

5. Neutralize

The formula of the neutralizing solution is: NH4OH diluted to a solution with a pH value of 10-11. The operating process requirements are: soaking at room temperature for 3 minutes.

6. Passivation

After pickling, water rinsing, and rinsing, the metal surface is very clean, very activated, and easily corroded. Therefore, passivation treatment must be performed immediately to form a protective film on the cleaned metal surface to slow down corrosion. The passivation solution formula is: NaNO2 concentration is 8% to 10%; NH4OH concentration is 2%. The operating process requirements are: immersion at room temperature for 10 minutes.

7. Water flush

Rinse with purified water with a pressure of 0.8MPa.

8. Dry

Drying must be done with clean, oil-free dry air or nitrogen.

9. Check

Wipe and check with white filter paper. If there is no trace of grease on the paper, it is qualified. After passing the inspection, seal the two ends of the pipe with plastic cloth and tape.

https://www.xysteelpipe.com/degreasing-and-pickling-passivation-of-carbon-steel-tubes/