... , ST52, A335P11,P5,P910,P22, ST37, STK400GB5310-2008, ASTM A335/A335M ASTM A213/A213M JISG3458-19888-1240mm, 1-200mmApplied to electric ... etc.High-pressure boiler pipe12Cr2MoWVTiB WB36 SA106 ST45.8GB5310-1995, ASTM A106-1999219-824mm, 24-78mmUsed in automobile industry,chemical ... K55, API N80,etcGB,ASTM,API5L2.1-110mm,10.3-508mmUsed in oil & gas fieldsWelded Steel Pipe10#,20#,45#,Q195,Q215,Q235,Q345, ...