Seamless steel pipe details: 1: GB, ISO , API certificate. 2: 80000 ton per month. 3: fluid tube,boiler tube Carbon steel, and alloy ... B60005Transmission fluid tube10#,20#,Q295,Q345,Q390300006Structural use of seamless steel tubes10#~45#,40Mn2,35Cr,35CrMo500007Hydraulic pillar tube, cylinder ... fertilizer equipment20G,15MnV10009Shipping use of tube320,4101000Total200000 carbon seamless steel pipe