... 3.Thickness: SCH20, SGP, STD, SCH40, SCH80 Carbon Steel Pipe FittingsCarbon steel pipefittings Place of Origin: China Material: ASTM A234WPB1) ... SCH20, SGP, STD, SCH40, SCH80, SCH160 3) Standard: ANSI B16.9/16.28, ASTM,API 5L, ... carbon steel5) Surface treatment: black rust-proof oil, transparent oil, hot galvanizing6) Price : Very competitive 7) Special design available Carbon Steel Pipe Fittings ...