Product Name Mild carbon welded square/ rectangular pipe at high quality Standard API 5L,ASTM A213, A312, ASTM A269,ASTM A778, ASTM A789, DIN 17456,ASTM A106,ASTM A53,ASTM A36,DIN 17457,DIN 17459, JIS G3459,JIS G3463, GOS T9941, EN 10216, BS3605, GB13296,etc. Material Q195, Q235, Q345, 20#,20G,STPT410,STF410,A106,GR.B,A178C,A178D,P265GH,A53 GR.B,A135 GR.B,P265TR1,P265TR2,STPT480,A106,GR.C,A210C,Q195,Q235,Q345,ST35.8,ST45.8, ST52, etc Usage pipes are widely used in light industry,machinery, instrument and other industrial pipeline and mechanical structure parts, etc. ENDS Plain /Beveled / Thread with Coupling or cap /Chamfer /Groove /Screw Type Hot-rolled /Cold-rolled /Cold-drawing Inspection With hydraulic testing, eddy current, infrared test Surface Black painted, PE/PVC/PP coated, Galvanized, color coated, anti rust varnished,anti rust oiled, checkered, epoxy coating, etc.