... to customer s requirement.Type Butt-welded seamless carbon steel pipe elbow.Wall thicknessSCH10, SCH20, SCH30, SCH40, STD, SCHXS, SCH80, ... .28 Japanese standard: JIS B2311, JIS B2312Application Oil, chemical industry, water conservancy, electric power, boiler, machinery, metallurgy, sanitary construction, etc. ... processing machines of elbows push-type forming and chamfering. sch160 pipe fittings