Specifications ASTM A860 High Yield ASME SA860M High Yield Dimensions ASMEANSI B169 ASME B1628 MSSSP43 Size Seamless Butt Weld Fittings 12 10 Welded Butt Weld Fittings 12 48 Type Seamless Welded Fabricated Schedule Sch 5 TO Sch XXS Thickness 20 Swg 18 Swg 16 Swg 14 Swg 12 Swg 10 Swg amp Sch 10 Sch 40 Sch 80 etc