... Steel Pipe 10#,20# 45#,Q345B(16Mn),A106 Gr.A, A106 Gr.B,A53 Gr.A,GR.B, ST37-2.ST42,ST45,ST52,ST52 ... .3,ST52.4,ST35.4,ST35 Seamless Steel Pipe Standard:GB/T8162-1999 GB/T8163-1999 ... ,A179-C ST37-2,ST35.4,ST35.8,ST42,ST52, A192 ST52.3,ST52.4 20Cr,40Cr,20CrMo,30-35CrMo,12CrMOD:6-610MM ... ")WT:1-50MM(SCH 5S-SCH160)End:BE/PE seamless steel pipe