A106Gr B Seamless Steel Pipe 1.SIZE8.0-630*3-45mm 2. ... according to customer requirement.ASTMStandardASTM A 106-B,ASTM A 53-B,API 5LMaterialGR.A,GR.B,X42 X46 X52 X56 X60 X65 ... production process is made under the ISO9001:2000 strictly. A106Gr B Seamless Steel Pipe