API 5CT ERW Steel Pipe Requirements for manufacturing During the API 5CT ERW steel pipe manufactureing process, the tempering heat treatment is simulated around the welding line. Both ends of the pipe are perpendicular to the center line and there should be no blurs on the interior seamed edge or the exterior edge. Applications The API 5CT ERW steel pipe is typically used as components of oil fielding casing and oil drum. Technical specifications The API rating standards for the API 5CT ERW steel pipe include PSL 1 type, PSL 2 type and PSL 3 type. Materials H40,J55 and K55 steel type is used to manufacture the API 5CT ERW steel pipe. Zhongshun is a ERW steel pipe manufacture and supplier. We also offer 3PP coating steel pipe, pilling and SSAW steel pipe. Our high quality products are offered at competitive prices. Zhongshun is located in China, where the full chain of manufacturing pilings and galvanized steel pipes can be completed, even in one city, which helps save our production cost.