ERW welded pipe, ERW straight seam welded pipe mainly divided into ERW ac welded steel pipe and ERW dc welded steel pipe two forms.ERW straight seam welded pipe according to the frequency of the different frequency is divided into low frequency welding, if welding, super if welding and high frequency welding.High frequency welding is mainly used for the production of thin wall steel pipe or common wall thick steel pipe.
Ac welding in accordance with the frequency of the different into low frequency welding, if welding, super if welding and high frequency welding.High frequency welding is mainly used for the production of thin wall steel pipe or common wall thick steel pipe.Dc welding is generally used for small diameter steel pipe.
Therefore, generally speaking, high-frequency welded pipe is included in ERW welded pipe, which is a kind of ERW welded pipe produced by high-frequency welding process.ERW straight seam welded pipe is an economical steel pipe with advanced performance and quality in the field of oil and gas storage and transportation.
ERW welded steel pipe is commonly used as wire casing in the power industry. Performance features: 100% ultrasonic testing of the base material ensures the internal quality of the pipe body;No unwinding - disc cutting process, base material pit, scratch less;There is basically no residual stress in the finished pipe after eliminating the stress.Short weld and low probability of defects;Can be conditionally transported wet acidic natural gas;After expanding, the geometric dimension precision of steel tube is high.Welding is carried out in a straight line at the horizontal position after the completion of molding. Therefore, the wrong side, seam opening and pipe diameter circumference are well controlled and the welding quality is excellent.
The company's main products are divided into three categories:
Two straight seam steel pipe production lines, product specifications - Ф Ф 114.3 mm 508 mm, thickness 3.58 mm to 16.3 mm.
Ten spiral pipe production lines, product specifications - Ф Ф 219.1 mm 3000 mm, thickness 5 mm to 30 mm.
Two oil for oil casing production lines, product specifications - Ф Ф 60.32 mm 508 mm wall thickness of 4.24 mm to 16.3 mm.
Supporting two anti-corrosion and insulation production lines.Product executable standards: API 5L, API 5CT, ASTM, en10219-2, GB/T9711, 3091-20081, 3793-2008, 14291-2006 and other international latest standards.Steel grades of products include :GRB, X42, X52, X60, X65, X70, J55, K55, N80, L80, P110 and other steel grades.
The main purpose
electric resistance welded (erw) pipe stands for resistance welding. Resistance welding is characterized by high production efficiency, low cost, material saving and easy automation, so it is widely used in aviation, aerospace, energy, electronics, automobile, light industry and other industrial sectors, water engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation and urban construction.For liquid transport: water supply and drainage.Gas transportation: gas, steam, liquefied petroleum gas.For structure: for pile driving pipe, as a bridge;Wharf, road, building structure pipe, etc.Is one of the important welding processes.
The products are widely used in petroleum, natural gas, coal mine, machinery, electric power, piling and other purposes.The company has selected international advanced technology equipment, such as w-ff molding, solid-state high-frequency induction welding, ultrasonic testing, magnetic flux leakage testing, and high-end testing instruments, such as metallographic analysis, vickers hardness tester, impact testing machine, spectrum analyzer, universal testing machine and other equipment.Products are exported to South America, North America, the European Union, southeast Asia and other places.Over the years by customers around the world.