Seamless pipe production line cooling bed type

    Seamless pipe production line cooling bed type has single chain cooling bed, double chain cooling bed, new chain type cooling bed, stepping rack type cooling bed, screw type cooling bed.

    1, Single chain cooling bed

    Single-stranded cooling bed adopts climbing structure. The cooling bed consists of a forward transport chain and a fixed rail with a drive system. The steel pipe is placed between the two grips of the forward transport chain, and the fixed rails bear the weight of the steel pipe body. Single-stranded cooling bed using the forward transport chain claw and the fixed rail friction force to make the steel pipe rotation movement, while relying on the weight of steel and lift the angle, so that the steel pipe is always close to the forward transport chain claws to achieve smooth rotation of steel.

    2, Double-stranded cooling bed

    The double-stranded cooling bed consists of a forward transport chain and a reverse transport chain, each with a drive system. The steel pipe is placed between the two lines of the forward transport chain, and the reverse chain carries the weight of the pipe body. The double-stranded cooling bed utilizes the thrust of the forward transport chain to push the steel pipe forward, and use the friction of the reverse chain to cause the continuous rotation of the steel pipe. The movement of the reverse chain also makes the steel pipe always leaning against the jaws of the forward transport chain to achieve smooth rotation and uniform cooling.

    3, The new chain of cooling bed

    Combined with the characteristics of single-stranded cooling bed and double-stranded cooling bed, the cooling bed is divided into uphill and downhill. The uphill section is a double-stranded structure consisting of a forward transport chain and a reverse transport chain. The positive and negative interaction causes the steel pipe to continue to rotate forward and do climbing. Downhill section for the forward transport chain and steel pipe parallel arrangement of single-chain structure, relying on self-weight to achieve rotation, so landslide movement.

    4, Stepping rack-type cooling bed

    Stepped rack-type cold bed consists of two sets of racks, one set on the fixed beam, called the static rack, the other assembly on the moving beam, called the moving rack. When the mechanism moves, the moving rack is lifted up and the steel pipe is lifted, and the steel pipe is rolled once in the toothed shape when it is lifted. After the moving gear is raised to the highest position, the stepping mechanism moves the moving rack into a step in the direction of the cooling bed output. The lifting mechanism continues to move, driving the moving rack down and put the steel pipe into the stator tooth slot, the steel tube along the tooth of the tooth re-rolling once, after moving the rack back to the initial position to complete a working cycle.

    5, Screw-type cooling bed

    Screw cooling by the main drive, screw and fixed cooling platform and other components, the screw, including screw rod and screw spiral. The working surface of the fixed cooling platform is higher than that of the screw core and below the helix. The weight of the steel pipe body is borne by the fixed cooling platform. The main drive drives the screw to rotate synchronously, and the helix on the screw drives the steel tube to roll forward on the fixed cooling stand and cool it.

    Single-stranded cooling bed is not suitable for continuous operation, double-stranded cooling bed is better, the new chain-type cooling bed effect is good and low cost, stepping rack-type cooling bed is generally used in large or high configuration line, Screw-type cooling bed is generally used to cool smaller diameter seamless tubes.

The weld edges heated temperature

    (LSAW - Longitudinal Submerged Arc Welding), it was the same as manual welding (LSAW - Longitudinal Submerged Arc welding), which was the same as the manual welding of LSAW-Longitudinal Submerged Arc welding. The place is that it is with the mold residue, but the slag is not the coated electrode. It is specialized in melting flux. This coating system consists of a funnel welded through a pipe to the front of the flux.

    Five-wire submerged arc welding wire diameter should be selected according to the welding current, when the current 5 wires in the same wire diameter to adapt to the current range, you can use the same wire diameter combination. Five wire submerged arc welding current and arc voltage settings, you can press 1 silk high current, the voltage gradually transition to five wire small current and voltage. In the current general decline of 10% to 30% of the line gradually reduced, the arc in the 1 ~ 3 V voltage gain gradually increased.

Today I will be the master of my steel pipe

    The tides advance; the tides recede. The price up; the price down. Winter goes and summer comes. The customers come and the customer goes. The length long, the length short. All things is a circle of moods and I'm a part of nature and so, like the tides and price, my moods will rise; my moods will fall. But today I will be the master of my steel pipe, no matter ERW steel pipe or LSAW steel pipe.

    So how will I master these steel pipe's prices so that each day will be productive?

    Materials and production skills depend on the manufacturer to high quality but I make my own calculation, yet I make budget with me.

    If I bring competitive price with joy, enthusiasm and brightness and laughter service to my customers, they will react with joy and enthusiasm and brightness and laughter and my steel pipe will produce a harvest of sales and a granny of gold for me.

    Today I will be master of my steel pipes, with considerable price, nice service. I will provide steel pipes with standard: API 5CT and certificate: Casing: LTC, STC, BTC, VAM.Tubing: NUE, EUE to give my customers joy.

    http://www.xysteelpipe.com/info/Today-I-will-be-the-master-of-my-steel-pipe-585-1.htm

Main standards and uses of seamless carbon steel pipe

    As per my last news, you could mentioned there it’s a seamless carbon steel pipe. But how many details you know about the seamless carbon steel pipe? It doesn’t matter if you are blind to this, as Great Steel Pipe would like to share the main standards and uses for all of you.

    The general carbon seamless tube is made with 10, 20, 30, 35, 45 or others high-grade carbon structural steel; 16Mn, 5MnV or others low alloy carbon structural steel; or made with 40Cr, 30CrMnSi, 45Mn2, 40MnB alloy steel through hot/cold rolling. It has an important position in China's steel industry. The below is the main standards and uses of it.

    ASTM A 53 specification for black steel seamless pipes

    ASTM A 106 Gr. B seamless carbon steel pipes?for high-temperature service

    ASTM A 161 seamless low-carbon and carbon molybdenum steel still tubes for refinery service

    ASTM A179 specification for seamless cold-drawn low-carbon steel heat-exchanger and condenser tubes

    ASTM A192 specification for seamless carbon steel boiler tubes for high-pressure service

    ASTM A 210 specification for seamless medium-carbon steel boiler and superheater pipes

    ASTM A 213 specification for seamless ferrite alloy steel boiler, superheater and heat-exchanger pipes

    ASTM A 519 seamless carbon and alloy steel for mechanical tubing

    ASTN A 556 seamless cold-drawn carbon steel feedwater heater tubes

    The general size of seamless carbon steel pipe is OD16mm-OD426mm, the wall thickness is 1.65mm-35.71mm, and the length can max with 14m.

    http://www.xysteelpipe.com/info/Main-standards-and-uses-of-seamless-carbon-steel-pipe-586-1.htm

How to handle the terrible trouble of corrosion for steel pipes

    It would make all of users angry when we figure out the corrosion situation for steel pipes, not only for oil and gas transmission ERW steel pipe, but also the general water transmission pipe. Today’s topic is how to handle the terrible trouble of corrosion for steel pipes.

    First of all, we should find out where is the trouble coming from. Pipe corrosion comes mainly from outside-pipe corrosion and corrosive medium transported inside the pipe. Serious inside -pipe corrosion exists in petroleum and sewage transportation piping as there are lots of medium in these products. Then, we can handle the solve methods with knowing the trouble. We can have a rational selection of material as transporting corrosive media. For example, seamless steel pipe, stainless steel pipe, and c, with adequately high strength, show sufficient toughness, good welding behaviour and resistance to corrosive media, are in demand for the transportation of the petroleum and sewage transportation.

    Do you get the idea for choosing of the steel pipes?

    http://www.xysteelpipe.com/info/How-to-handle-the-terrible-trouble-of-corrosion-for-steel-pipes-587-1.htm

Effect of Roller Adjustment on the Quality of ERW Pipe

    In the production of erw pipe, there is a process called roll adjustment. In the production process, the roll damage or wear serious, the need to replace some of the roll on the unit, or a continuous production of a certain number to meet the needs of the entire roll replacement. At this time should be conditioning rolls, in order to achieve outstanding steel quality. Such as the roll conditioning is not good, easy to form steel pipe seam changes, lap welding, marginal waves, drum kits and pipe body surface with indentation or scratches, oval steel pipe and other shortcomings, therefore, roll change should grasp the roll conditioning tips.

    1, Replace the standard steel pipe, usually the whole roll to be replaced. Roller conditioning approach is: with wire from the entrance to exit pull a base line, adjust, so that each hole in a base line, and make the molding line with the skill requirements. Replacing the standard roller, the first of the forming roller, guide roller, kneading roller, sizing roller for a full conditioning, and then focus on the closed roller forming roller, guide roller, kneading roller conditioning.

    2, The effect of the guide roller is to control the pipe suture direction and the height of the bottom of the tube to ease the marginal extension, control the edge of the tube rebound, to ensure seamless pipe without changing into the roll. Such as the guide roller conditioning is not good, in the steel pipe welding process, easy to form changes in steel pipe joints, lap welding, marginal waves and other welding shortcomings.

    3, The kneading roller is the key equipment of the pipe unit, the effect is the edge of the tube is heated to the welding temperature of the kneading roller kneading effect under the pressure of the end of the pressure welding. In the production process, to control the size of the kneading roll opening angle. When the kneading force is too small, the strength of the weld metal decreases, cracking occurs after the force is applied. When the kneading force is too large, the welding strength is decreased and the amount of the external burr is added, so that the welding defect such as lap welding is easily formed.

    4, In the slow start of the pipe unit in the process, should pay close attention to the various parts of the roll rolling conditions, at any time conditioning rolls to ensure the quality of welding pipe welding skills and standards meet the requirements of the request.

Steel products logistics

    Steel products logistics operation mode is divided into three modules: purchasing and transportation of raw materials - steel production logistics - finished product sales logistics

    Raw material procurement and transportation

    The steel industry needs raw materials mainly iron ore and energy, which will cost a lot of business procurement and transportation costs. In general, large domestic iron and steel enterprises have their own mines both at home and abroad. Each year a large number of imported iron ore from abroad are transported back to the production base by sea. Specific operations, the large shipping by the ocean will be transported to the domestic port of the port, and then allocated in the port, and then transported back to the company through the inland production base. In order to prevent unforeseen factors, enterprises also hoard a large amount of raw materials, only this part of the need to consume expensive business procurement, transportation, inventory costs. In the context of the general rise in international ore and seaborne prices, how to reduce procurement and transportation costs is a headache for the domestic steel industry's logistics department every year.

    Finished product sales logistics

    In general, steel sales are always marketed with their processing and distribution centers. Data shows that China now has nearly 300 steel processing and distribution centers. In the next few years, for the large iron and steel enterprises, the biggest trend of the finished product sales logistics is the establishment and improvement of the steel marketing system. More and more powerful enterprises will transform the existing marketing network into a trunk transportation plus area Distribution of the reasonable model.

Heat expansion of seamless steel pipe production technology

    Thermal expansion of seamless steel pipe is the use of the original tube diameter expansion technology, expansion is a use of hydraulic or mechanical way from the inner wall of the steel tube to the radial outward expansion of the pressure forming process. Mechanical way than the hydraulic way, the equipment is simple and more efficient, in the world's most advanced several large-caliber seamless steel pipe expansion processes have been used, the process is:

    Mechanical expansion of the use of expanding machine end of the fan-shaped segment radially expanded, so that the tube along the length of the stepping manner, the whole pipe length plastic deformation process, thus producing seamless hot-expanded seamless steel pipe. Which is divided into five stages:

    1. Initial rounding stage. The segments open until all the segments contact the inner wall of the tube. At this point, the radius of each point in the inner tube of the tube is almost the same, and the tube is initially rounded.

    Nominal diameter stage. The segment begins to decelerate from the front position until it reaches the desired position, which is the quality required inner circumference of the finished tube.

    3 rebound compensation phase. The segment begins to move further down the 2-stage until it reaches the desired position, which is the inner circumference of the pre-rebound steel required by the process design.

    4 pressure stability stage. Sector in the pre-complex steel tube within the circumferential position for some time remain intact, this is the device and diameter requirements of the steady-pressure stability stage.

    Unloading return to the stage. The segments rapidly retract from the inner circumference of the steel tube before the rebound until they reach the initial diameter expansion, which is the minimum shrinkage of the segments required by the expansion process.

    http://www.xysteelpipe.com/info/Heat-expansion-of-seamless-steel-pipe-production-technology-509-1.htm

Production and Elimination of Fracture in Cold Drawn Seamless Steel Tube

    Cold drawn seamless steel pipe, the hot-rolled tube blank cracks or other defects or high-precision cold drawn tubes are made after the cylinder, the fracture occurred in the course of use, almost no plastic deformation occurred, are generally brittle fracture. Brittle fracture is caused by a variety of reasons. Such as: precipitates on the grain boundary, regardless of its strength than the matrix strength is strong or weak, are all the causes of cracks; segregation of inclusions in the grain boundary is also the cause of fracture; In addition, even in far less than the yield limit of the intersection Variable load, also can cause fatigue fracture phenomenon.

    In general, hydraulic (pneumatic) components used in the design of mechanical properties are based on the assumption that the material is uniform, continuous, isotropic, according to this method is considered a safe design of the design, and sometimes accidents Fracture accident. The study found that during the low stress brittle fracture that occurs in high-strength metal materials, the material organization is far from homogeneous and isotropic. There will be cracks in the organization, there will be inclusions, pores and other defects, these defects can be seen as micro-cracks in the material. In addition, the brittle fracture is also related to the service temperature of the component. People through the study found that when the temperature is lower than a certain value of temperature, the material will be transformed into a brittle state, the impact absorption decreased significantly, this phenomenon is called cold and brittle, so the design time but also based on component operating temperature Select the material with suitable cold and brittle transition temperature.

    High-precision cold-drawn seamless steel pipe is generally increased by adding alloys in the metal to improve the performance of materials, seamless steel pipe after cold drawing, are required to stress relief annealing to eliminate the residual stress of the material to improve the material organization, Improve the plasticity of the material, so as to achieve the purpose of preventing the failure of the seamless steel pipe from breaking.

    At present, China's cold-drawn seamless steel pipe are made of ordinary 45 # or 20 # steel 27SiMn steel, cold-drawn deformation to improve the strength of the metal; However, it is at the expense of metal plasticity, toughness for the price. High-precision cold drawn seamless steel pipe is based on its high dimensional accuracy and high strength performance and based on the market, it must ensure that the deformation in a certain range, in order to maximize the performance of materials to reduce the material Negative Effects.

    Cold drawn seamless steel pipe deformation is too small, can not meet the requirements of surface finish and dimensional accuracy, also can not reach the component strength indicators; deformation is too large, seamless plastic pipe ductility, too much reduction, and the grain is too much Slender, forming a fibrous tissue, the metal will have significant anisotropy. Cold-drawn seamless steel tubes in the axial direction, parallel to the direction of elongation of the grains, the strength increased; radial drawing seamless steel tubes, perpendicular to the direction of elongation of the grains, the strength but lower, and the maximum hydraulic cylinder stress Exist in the radial direction of seamless steel pipe, so too much deformation on the full performance of cold-drawn tube adverse.

    For steel fibers appear as well as dislocations, vacancies and other crystal defects, usually take annealing or normalizing and other heat treatment to be eliminated. The purpose of annealing is to refine grains, eliminate tissue defects, reduce hardness, improve ductility, and facilitate cold working. Cold drawn seamless steel pipe production, an indispensable annealing equipment, therefore, to develop a suitable annealing process is to ensure that the organization of cold drawn seamless steel pipe, the product does not appear the necessary conditions for fracture defects. If the manufacturer in order to reduce production costs, reduce the annealing process, will certainly adversely affect product quality.

    http://www.xysteelpipe.com/info/Production-and-Elimination-of-Fracture-in-Cold-Drawn-Seamless-Steel-Tube-508-1.htm

Steel pipes would be our support in our daily life

    Holding on the steel pipe on the bus in the morning when I took a bus for office, I wondered that how convenient when we have car. Of course, thanks to steel products, like ERW steel pipe, seamless steel pipe, we can enjoy this happy life. As we all know that steel has been used widely everywhere with the advanced technology.

    Agriculture industry: Whether you choose LSAW steel pipes for water transportation or diesel engine, there is no doubt we have connection with steel.

    Solar: The pillar supporting the solar engine would be made by galvanized steel pipe is necessary. Of course, we can see steel in here has played an important role in converting solar energy into hot water too.

    Traffic industry: Whether cars or railways, there is shadow for steel as well as steel pipes around them.

    Wind: How could we forget steel when we talk about onshore and offshore wind turbines as it is main original material applied in the machine. It seems like the components of a wind turbine is made by steel.

    No matter where we are, we cannot leave without the steel as it is our princess!

    http://www.xysteelpipe.com/info/Steel-pipes-would-be-our-support-in-our-daily-life-507-1.htm

Steel Beams’ Role in Civil Construction

　　As a steel supplier for more than 30 years,Tianjin Xinyue Steel Group has witnessed a tremendous growth in the use of steel beams in construction. Steel have plenty more advantages over traditional wood beams, including faster installation, eco-friendly composition, and a safer role is construction.

　　Considering how steel manufacturer can produce beams to fit precise specifications, they can be adapted to nearly any type of frame.

　　In addition to the general frame of a civil construction, steel beams make an exception choice for ceiling beams. At the same time, steel can support heavier loads than wood, giving builders the opportunity to use fewer beams in roof construction.

　　Although steel prices are typically higher than the cost of wood, the material may provide a better return on your investment. For one, since steel beams allow for faster construction, you can save more money on contractor services. Long-term savings are also a benefit, as steel can lower your home insurance rates and requires less maintenance over the years.

　　If you want to buy steel for your home construction project, Tianjin Xinyue Steel Group is a trusted resource for this essential construction material. As a time-honored steel pipe exporter, our specialists are not only able to provide shearing, cutting, and beam splitting services, but they also offer complete priming and galvanizing to further protect your steel products .


　　Source:www.xysteelpipe.com

A guide to Galvanize

　　If you really cares about life span of your steel, you can take galvanized steel pipe into your consideration. The black steel pipe maybe very good, but because of weather and rain and other factors, steel pipe may corrosion rapidly. While with galvanize, lifespan of your steel pipe will be much longer than your expectation.

　　Galvanizing is one of the best way of prevent steel pipe from corrosion. When steel pipe becomes corroded, it not only becomes unsightly, but may even lose its integrity. Typically, the galvanizing process consists of technicians adding a layer of zinc to the pipe. It is used on many types of pipes including seamless steel pipe and welded steel pipe. Thanks to the galvanizing procedure, steel pipes receives a buffer against damaging foreign elements like salt. As long as the zinc is not scratched away, the metal will be protected.

　　When professionals galvanize your pipe, there are two essential ways that the zinc will defend your black steel pipe In the primary way, the zinc is simply a physical barrier preventing exposure to damaging agents. In the second, a process called galvanic corrosion may occur.

　　The next time you import steel pipes, don’t forget the importance of galvanizing. It’s highly recommended by experts like?Tianjin Xinyue Steel Group.


　　Source:www.xysteelpipe.com

Why we choose steel instead of concrete in construction

　　When a contractor have a building project in hand, which material to choose is a important decision to make. Some may use concrete, but most of them prefer steel instead.

　　Steel and concrete are two widely used choices in commercial building, but steel is often the option with more advantages?Tianjin Xinyue Steel Group is a trust-worthy steel company, offering both high-quality building materials and reliable industry knowledge. Here, we’ll provide some reasons why you should use steel for your next project.

　　Minimize Maintenance: The endurance of steel pipe costs much less structural maintenance, which can save both your time and cost.

　　Availability: In recent years, Chinese market demand more concrete than its supply. Steel is more available now. If you want a safer building, choose steel when you begin your project.

　　For the sake of less cost, much safer, and availability, steel surely will be your first choice.


　　Source:www.xysteelpipe.com

Economy products steel pipes

　　Repair and maintain would be huge problem for pipes not only plastic but also steel like ERW steel pipe as well as seamless steel pipe. Compared the economy cost, editor Sara thinks that steel pipes would save human labor and maintain cost too.

　　One of benefit of steel pipes is its recycling as repair by welding. It can be replaced with the similar products like seamless steel pipes, ERW steel pipes with SSAW steel pipes. Finally, we could figure out that the cost of buried pipes in pipe, embedment, transportation, installation, operation and maintenance, repair would be more cheap than other plastic pipes if we get the final cost.

　　Due to the thin wall and light weight, we can find that large diameter transporting steel pipe like SSAW steel pipe is cost effective than small diameter steel pipes. Of course, long pipe sections would reduce the number of welds like the joints connecting too. What’s more, in the event of a massive soil wash-out, welded steel pipe sections tend to hold together and minimize the disaster caused by a break in a pipeline.


　　Source:www.xysteelpipe.com

Money future for large-diameter seamless steel pipe

　　The out-diameter of seamless steel pipe can be range from 21.3 to 914.4mm. Then what are benefit by using large-diameter seamless steel pipe?

　　First of all, after hot rolling or forging a special heat treatment, large-diameter seamless steel pipe would have no further direct delivery after cooling. Generally speaking, the hot-rolled (wrought) termination temperature is generally 800 ~ 900 ℃, which is unlike the normalizing strict temperature control heating steel pipes so hot rolling seamless steel pipes would have better performance on steel micro-structure and mechanical properties.

　　One more thing, annealing would play an important role in the production process of seamless steel pipes as it would eliminate defects and improve the organization and internal stress left before the procedure and after the procedure to prepare for the organization and performance, alloy structural steel, guaranteed harden-ability structural steel, cold heading steel and so on. Thus, we can get high quality product for our engineering project for strict demands coming from customers.


　　Source:www.xysteelpipe.com