... : 6-36mmWall thicknessSGP, STD, SCH40, SCH80, SCH160. XS,XXS and so on.StandardsANSI B16.9 / 16.28, ... A53GRB,A53-A,A106-A,A192,A226,A315-B,A106-B,A178-C,A210-A-1,A210-C, ... in advance , the balance against with the copy of B/L) Equipment Quality Control: Our products :carbon steel ... ,SCH20S,SCH30S,SCH40S,SCH10,SCH20,SCH30,STD SCH40, SCH60, XS, SCH80., SCH100, SCH120, SCH140, SCH160, XXSFlangeType:welding ...