... quality as per API5L,GB,JIS,DIN ASTM, BS standard and your additional requirements. 1.Commodity NameSeamless steel pipes2. ... ,ASTM A53 , ASTM A179, ASTM A210 ,ANSI B36.10, GB 5310,10# 20#, 45#,GB 3087, GB/T 8162 ,GB/T81633 ... ;with FBE internal coating for water steel pipes.10.MaterialA53(A,B),A106(B,C)Q235B,Q345B,16Mn ... , 10# 20#,45# S235JR, S355JR;ASTMA252 Gr.2,Gr.3 ...