seamless pipe manufacture 1 standard: API,BS, JIS, GB, DIN, ASTM 2 grade: X42,X46,X52,X56,X60,X65,X70.... seamless ... 2 WT: 1~30mm 3 Length: max12000mm 4 Standard: ASTM ,API.DIN,GB.JIS 5 Material: A106 Gr A,B,A53 Gr ... B,ASTM A179,A106GrB,ASTM .A53GrB St42 St45 Tp321 Tp315 mechanicalproperties StandardGradeTensile ...