ERW Line Pipe

A: ERW steel pipe is welded longitudinally, while the weld of spiral welded pipe is spiral. In comparison, ERW steel pipe has higher dimensional consistency and less weld length in small and medium-caliber products, which is suitable for short-distance linear transportation or structural parts.

A: Hot-rolled or cold-rolled steel strips (such as Q195, Q235, Q345, API steel grade, etc.) are mainly used as raw materials. The chemical composition, thickness tolerance and surface quality of the raw materials have a direct impact on the final steel pipe performance.

A: In some high-demand applications (such as pressure pipelines), in order to improve the organization and eliminate stress in the weld area, ERW steel pipes will undergo weld heat treatment (thermal annealing) to improve weld toughness and corrosion resistance.

A: ERW steel pipes can be used in medium and low pressure transmission systems, such as urban pipe networks, water supply pipelines, and natural gas transmission, provided that they meet relevant standards (such as API 5L, ASTM A53) and pass water pressure testing and non-destructive testing.

A: Yes. According to the use environment, anti-corrosion treatments such as external coating (such as epoxy powder, 3PE) and internal lining (such as cement mortar, epoxy resin) can be carried out to extend the service life of the pipeline and improve adaptability.

A: Compared with traditional welding methods, the ERW process does not require flux or welding rods, and has almost no waste slag and smoke emissions, which meets the requirements of modern industry for clean production and has good environmental performance.

A: Usually the standard length of the finished pipe is 6 meters or 12 meters, but fixed-length services can be provided according to project requirements. The customized length range is generally 3~15 meters, which needs to be coordinated according to transportation and equipment capabilities.

A: Yes. ERW steel pipes are suitable for various secondary processing processes, such as punching, bending, galvanizing, spraying, etc., and are suitable for a variety of industry applications such as building formwork support, furniture structure, and pipe gallery support.

A: Common testing methods include: water pressure test, ultrasonic testing (UT), magnetic particle testing (MT), eddy current testing (ET), metallographic analysis, dimensional measurement, etc. We can issue a third-party inspection report according to customer requirements.

A: Steel belts or plastic sheets should be used for packaging to prevent looseness or wear; wooden blocks should be used for isolation during long-distance transportation to avoid collision or bending of the pipe ends; some galvanized pipes need to be sealed with end caps to prevent oxidation and water ingress.