... carbon steel pipe elbow.Wall thicknessSCH10, SCH20, SCH30, SCH40, STD, SCHXS, SCH80, SCH120, SCH160, SCH XXS.Standard American standard: ASTM ... A234 WPB ANSI B16.9, B16.28 Japanese standard: JIS B2311, JIS B2312Application ... We can also produce kinds of elbows, tees, reducers and mechanical processing machines of elbows push-type forming and ...