SSAW Pipe

    LSAW steel pipe is the strip into the pipe unit, the multi-roll rolling, strip gradually rolled up to form a circular gap open billet, adjust the squeeze roll reduction, so that weld gap control In the 1 ~ 3mm, and make both ends of the welding flush. If the gap is too large, it will reduce the proximity effect, eddy current heat shortage, weld intergranular bonding caused by poor fusion or cracking. Such as between     If the gap is too small, the proximity effect will be increased, the welding heat will be too large, and the weld will be burned; or the weld will be crushed and crushed to form the pit, which will affect the weld surface quality.     Welding process example:     Weld φ32 × 2mm longitudinal welded pipe, for example, briefly describes the process parameters:     Strip specifications: 2 × 98mm bandwidth by medium diameter expansion plus a small amount of molding margin.     Steel material: Q235A ...

    In the manufacturing of lsaw steel pipe , the lsaw steel pipe manufacturers need to have very good control of the extrusion force.This is reason why in the welding process, the two tube embryo edge temperature reaches the welding temperature, The pressure can make their mutual penetration of metal grains, resulting in a combination of close crystallization, to achieve the purpose of welding firmly.But if the squeeze in the lack of crystallization is not well formed, the strength of the welding position will very low, in the course of the process is very easy to crack because of the role of external problems.But when the extrusion is too large to reach the welding temperature of the weld metal will be squeezed out of the weld location, the real welding together can be get the temperature and the metal will be very small, so the number of crystals will be reduced, it will also lead to welding is not strong enough, but also have a lot of burr, so it is more serious to the def...

    Carbon steel pipe use:     1. Machinery industry tube. Such as aviation structural tube (round tube, oval tube, flat oval tube), automotive axle tube, axle tube, automobile tractor tube, tractor oil cooler tube, agricultural square tube and rectangular tube, transformer tube and bearing tube and so on.     2. Petroleum geological drilling tube. Such as: oil drilling pipe, oil drill pipe (square drill pipe and hexagonal drill pipe), petroleum tubing, casing and various oil pipe fittings, geological drilling pipe (core pipe, casing, active drill pipe, by hoop and pin connector, etc.).     3. Pipeline pipe. Such as: water, gas pipes, steam pipes with seamless pipe, oil pipelines, oil and gas trunk pipe. Agricultural irrigation faucet with pipe and sprinkler pipe and so on.     4. Chemical industry tube. Such as: oil cracking pipe, chemical equipment, heat exchangers and pipelines, stainless acid-resistant tubes, high pressure pi...

    Expiration date would tell us this product can use or not at the specific date. So does for the galvanized steel pipe, as they have similar life time too. How could we prevent the troubles galvanized steel pipe caused due to the long time using? Knowing the trouble and then figure out the dealing way would be a nice shoot.     Low water pressure: Corrosion in galvanized steel pipe may make lower water pressure throughout your house’s water pipeline because of the restriction of the whole transportation line.     Uneven distribution of water: You would know how angry you are when you find the uneven distribution of the kitchen waste water. Due to some of your steel pipes have low water pressure, while others don’t. Thus it would be a symptom of galvanized steel pipe. And corrosion can build up unevenly.     Discoloration of water: Galvanized pipes can release iron and cause discoloration. A clear indicator of this is a brown stain on a po...

    Generally speaking, outer thickening oil steel pipe, like the high quality seamless steel pipe, has been applied popular in the petrol production and many other products too. Today, Today, the oil production steel pipe is introduced.     First of all, we should know that OCTG, which is including pipe, casing, line pipe is the whole equipment for the oil production process. There are lots of troubles for pipes during the process which we need to handle, such as during production process, loss of wall thickness such as rod wear, relatively large areas of corrosion is one of the main sources of failure of used oil well piping. Under this situation, so we should figure out that outer thickening oil pipe would be necessary for oil production. In addition, thread gluing is a common failure of oil piping found during manufacture and operation and this is another trouble we need to handle. So that checking for quality before application would be an important step for m...

    High frequency straight seam welded pipe after welding, the heat treatment is a new elimination of residual stress technology. Before welding, the material is preheated to the post-heat treatment temperature and the weld is continuously heated during the welding process to maintain this temperature. After the welding is completed, it is warmed by the heat-insulating cotton to cool it slowly. This method can effectively reduce the welding residual stress, improve the metal resistance to stress corrosion.     Non-destructive testing of the weld due to the pipeline in the water supply project is a large steel pipe, especially the thickness of t = 30mm steel pipe is used as a pipe bridge, it is necessary to bear the water pressure, but also bear the weight of the steel pipe and water bending moment, so the quality of the welding requirements are particularly high. For the pipe with t = 30mm thick large diameter steel pipe, the longitudinal seam and ring joints are ...

    (1) High frequency straight seam welded pipe forming process is small rebound, the remaining stress is small.     (2) Deformation hardening effect is small, the whole circle after the geometric standard is accurate, conducive to ensuring the construction and welding quality.     (3) High frequency straight seam welded pipe weld shape is good, not prone to undercut, the surface welding is not a medium defect.     (4) High frequency straight seam welded pipe bead distribution in the circumference of a point, therefore, according to the requirements of the weld on the favorable position.

    Why are you keeping the curiosity door locked? Why are you keep the knowledge door for steel pipe locked? Now entering the world of ERW steel pipe would be the required lesson for clients and buyers.     Seamless steel pipe, ERW steel pipe, LSAW steel pipe are the most common used standard steel pipe nowadays. They are part of tubular goods which are manufactured to different specifications like the round steel pipe and square steel pipe, different standards such as API 5L, API 5CT, ASTM A252, ASTM 53, EN10217, EN10219, BS, JIS, IS just for SSAW steel pipe. Of course, pipes are sold also by various sizes from 1/8" to 72". Welded pipe like ERW steel pipe and seamless steel pipe would be the common types among all the steel pipes. Welded pipe is also called ERW (Electric Resistance Welded) pipe. Most common specification for welded carbon steel pipe is A53. Seamless pipe is made by process that requires no welding. Most common specification for seamless carbon st...

    It is the common sense for your answer when supplier of seamless steel pipe asks which kind of thickness you need. As we all know that different thickness parameters would have different function for various steel pipes.     Here are standards of thickness for commonly used seamless steel pipe:     General structure and mechanical structure seamless steel pipe would adopt (GB / T8162-2008).     You can choose fluid transportation steel pipe with (GB / T8163-2008) if you need to transport water, oil and gas.     If you use steel pipe for producing various structures of low and medium pressure boiler superheated steam pipes, boiling water pipes and superheated steam locomotive boiler pipes, arch pipe High-quality carbon structural steel hot-rolled and cold drawn (rolled) seamless steel pipes, it is better to use low and medium pressure seamless steel pipe with (GB3087-2008).     Seamless steel pipe for high pressure...

    As a part of Shinestar's production plans in steel pipes area, it also takes benefit of meeting the demand of spiral welded pipe for transportation of oil, gas and water as well as structural and industrial applications. Now the subsidiary company Threewaysteel has involved the production of spiral welded pipe too.     Threewaysteel has set up a modern, large manufacturing plan with the stream of the technology in process of steel pipe. With fusion bond epoxy coating, coal Tar Epoxy, 3PE, Vanish Coating, Bitumen Coating, Black Oil coating according to every customer's requirement, there is no doubt that we can make high quality products for customers. At the same time, the expansion of spiral welded pipe has facilities for production of ERW pipes, seamless steel pipe too. The Spiral Welded Pipes are used for low pressure liquid delivery, such as water, gas, and oil; construction and piling at various pressures and densities over long distances.     ...

    (1) ASTM A179 cold drawn steel pipe with carbon steel pollution: contact with carbon steel caused by scratches and corrosive media to form the original battery and electrochemical corrosion.     (2) ASTM A179 cold drawn steel pipe cutting: slag, splash and other easy to rust the material attached to the corrosive medium and the formation of the original battery electrochemical corrosion.     (3) Heating: the composition of the flame heating area and microstructure changes and not uniform, and the formation of the original medium of corrosive media and electrochemical corrosion.     (4) ASTM A179 cold drawn steel pipe welding: physical defects in the welding area (undercut, pores, cracks, not fused, not welded, etc.) and chemical defects (coarse grain, grain boundary poor chromium, segregation, etc.) and corrosive media to form the original Battery and produce electrochemical corrosion.     (5) Material: chemical defects of c...

    How to prevent buckle adhesion of J55 erw casing, API erw casing with a hollow section, a large number of pipes used for conveying fluid, such as the transmission of oil, natural gas, gas, water and so on. The use of steel pipe manufacturing ring parts, can improve the utilization of materials, simplify the manufacturing process, saving materials and processing time, such as rolling bearing rings, jack sets, etc., has been widely used to manufacture steel.     API erw casing is mainly used for oil and gas drilling and oil and gas transportation. It includes oil drilling pipe, oil casing, pumping pipe.     The oil drill is mainly used to connect the drill collar and drill bit and pass the drilling power. The erw casing is mainly used in the drilling process and after completion of the support of the wall to ensure that the drilling process and after the completion of the normal operation of the entire well.     ERW casing is the lifeline...

    ERW casing is a large diameter pipe, play a fixed oil and natural gas wells or wells role. The casing is inserted into the wellbore and fixed with cement to prevent the wellbore from separating the formation and the borehole from collapsing and ensuring that the drilling mud circulates in order to facilitate drilling.     The different types of bushings used in the oil extraction process: the surface of erw casing protects the wells from shallow water and shallow air, supports the wellhead equipment and maintains the other layers of the casing. Technical erw casing to separate the pressure at different levels, so that the amount of normal drilling fluid circulation and protection of production casing. In order to install anti-bursting devices, leak-proof devices and tail pipes in the drilling. The oil-bearing casing exports oil and natural gas from the storage layer beneath the surface. Used to protect the wells and stratify the drilling mud. ERW casing product...

    Quenched and tempered: erw casing quenched after the high temperature tempering known as quenching and tempering treatment. High temperature tempering refers to tempering between 500-650 ° C. Quenching and tempering can make the performance of erw casing, material to a large degree of adjustment, its strength, plasticity and toughness are better, with good comprehensive mechanical properties. After tempering treatment to get tempered sorbite. Tempered sorbite is formed by tempering martensite and is magnified by more than 500 to 600 times under an optical microscope microscope. It is characterized by the distribution of carbides in the ferrite matrix Carbon body) pellets of the composite organization. It is also a tempering organization of martensite, a mixture of ferrite and granular carbides. At this point the performance of erw casing in the ferrite has been basically no carbon supersaturation, carbide is also a stable carbide. At room temperature is a balanced organiz...

    The year 2017 was one marked with steady growth in steel consumption led by leading economies around the world. In 2018, the upward consumption trend will continue, but steel will mostly be consumed by new, up and coming nations looking forward to major development projects.     As cities begin to revive their infrastructure in favor of high-tech options, steel is quickly becoming a high-demand resource. In 2016, the top steel consuming countries were China, Japan, India, the United States, Russia and South Korea. These countries used the most steel and are expected to continue holding their ranks. But the steel industry is projected to slow down slightly in 2018. This is because the rapid growth in countries like China has reached a point of stabilization. The demand for steel will continue to increase 1.6 percent according to the World Steel Association. Compared to the growth rate of 2.8 percent in 2017, it is a significant decrease, but there are still area...