1.Seamless steel pipe 2.WT: 2-20 mm 3.OD: 21.3 ... Seamless steel pipeWe manufactCarbon Seamless steel pipe 1.Commodity NameSeamless steel pipes2.StandardASTM A106 ,ASTM A53 , ASTM A179, ASTM A210 , ... 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 ... Netherlands,Belgium, etc13.CertificatesAPI 5L; ISO9001:2000 ASTM A106/A53 Gr.B seamless steel pipe