... ASTM A106, AA53, API J55, K55, L80, P110, Seamless Carbon Steel pipe: Standard: ASTM, API, JIS, GB, DINGrade: ASTM A106, A53 ... power.(3)Temperature-resistant seamless steel pipe for high-pressure boiler(4)For refinery, heat-exchanging pipe(5)Fertilizer making equipment(6 ... )Over-heat pipe for low-and-medium pressure boiler, boiling water pipe, locomotive smoke pipe(7)Fluid feeding(8) ...