carbon steel buttweld fittings standard: ASME,JIS,DIN Type: elbow,tee,cap, ... ,ELBOW,REDUCERSize1/2"- 48"Wall thicknessSch 10- Sch xxsApplicable standardASME , ASTM, MSS ,JIS , DIN , EN,MaterialCarbon steel :ASTM A234 WPB ANSI B16 ... living by quality and developing our career by credit standing" carbon steel buttwelding fittings