1.Uniform wall thickness
2.High roundness accuracy
3.Three-layer welding to ensure excellent weld performance
4.Good insulation performance
5.Strong waterproof ability
6.High impact resistance under low temperature conditions to be directly buried in frozen ground
7.30-50 years service life
ERW straight welded pipe is also known as "resistance welded straight welded pipe". ERW steel pipe is mainly divided into ERW ac welded pipe and ERW dc welded pipe. ERW straight seam welded pipes can be divided into low-frequency welding, medium-frequency welding, ultra-medium-frequency welding and high-frequency welding according to different frequencies during ERW welding process. High-frequency welding is mainly used for the production of thin-wall steel tubes or ordinary thick-wall steel tubes. High-frequency welding is also divided into contact welding and induction welding.
ERW straight welded pipe (ERW line pipe) is characterized by simple production process, high production efficiency, low cost and rapid development. The strength of spiral welded pipe is generally higher than that of straight ERW welded tube. However, compared with straight pipe of the same length, the weld length increases by 30-100%, and the production speed is lower. Therefore, the smaller caliber welded pipe mostly USES straight seam ERW welding, large diameter welded pipe mostly USES spiral welding.
1, Widely used in the mechanical treatment field, petrochemical industry, transport and construction field
2, Ordinary structural purposes and mechanic structural purposes, for example in construction field, fulcrum bearing etc;
3, The transportation of fluids in the projects and big equipments, for example transport of water, oil, gas etc
4, Can be used in low and medium pressure boiler for the transportation of fluids, for example steam tube, big smoke tube, small smoke tube, generating tube etc
1. Composition and Mechanical properties of commonly used carbon steel alloy steel.
2. Seemless steel pipe, welded pipe, etc.
3. A series international universal series, domestic series.