... steel pipe 1.Commodity NameSeamless steel pipes2.StandardASTM A106 ,ASTM A53 , ASTM A179, ASTM A210 ,ANSI B36.10, GB 3087, GB/T 8162 ... pipes.10.MaterialA53(A,B), A106(B,C) Q235B,Q345B,16Mn, 10#.20#,45# Gr.2,Gr.3; ST37,ST42,ST52;Gr.B,X42,X46,X52 ... , France, England, the Netherlands,Belgium, etc13.CertificatesAPI 5L; ISO9001:2000 ASTM A106/A53 Gr.B seamless steel pipe