... ASTM A106, AA53, API J55, K55, L80, P110,.etc. Seamless Steel pipe: Standard: ASTM, API, JIS, GB, DINGrade: ASTM A106, A53 ... prices. Best Regards, Application:(1)With high carbon seamless steel pipe equipment standards(2)Used in the industries of petroleum, ... chemical engineering and electric power.(3)Temperature-resistant seamless steel pipe for high-pressure boiler(4)For refinery, heat-exchanging ...