Seamless Steel Pipe 10#,20# 45#,Q345B(16Mn),A106 Gr.A, A106 Gr.B,A53 Gr.A, ... ,ST52,ST52.3,ST52.4,ST35.4,ST35 Seamless Steel Pipe Standard:GB/T8162-1999 GB/T8163-1999 GB5310-1995 ASTM ... ASTM A210 ASTM A315,ASTM A179Material:10#,20#,45#,16MN(Q345B) A106 GR.A,B A53 Gr.A,B A210-A ... :1-50MM(SCH 5S-SCH160)End:BE/PE seamless steel pipe