Seamless pipes from OD139.7mm to OD244.5mm; standard: API 5L PSL1, PSL2, API 5CT, ASTM, GB standard Name: Seamless Steel ... of Origin: ChinaApplication: Seamless steel tubes for equipment, pipelines, vessels, pipe fittingsand mechanical StructuresGrade: 10,20,35,45,Q345,15CrMo,12Cr1MoV ... contact us, your inquiry will be highly appreciated andtreated. Seamless pipe