... -530*2-404000-13500seamless pipe for petroleum cracking processGB9948-200610,20,12CrMo,15CrMo10-530*1.5-364000-13500Hydraulic prop pipeGB/T17396 ... ,15CrMoG,12Cr2MoG,12Cr1MoVG14-630*2-804000-13500Structural pipeGB/T8162-200810,15,20,25,35,45,20Mn,25Mn,Q235,Q275,Q295,Q345,45Mn2 ... ,20CrMo,6-1020*1.5-1003000-13500Fluid pipeGB/T8163-200810, 20,Q295,Q3458-630*1.0-403000-13500Pictures of seamless steel ...