... Standard:ASME,BS,GOST,etc API,ISO,CE,etc pipe fittingsSize -- Seamless:from 1/2" to 24" ,Welded:from 24" to 96"( or ... deg,90 deg,180 deg, 1.0D, 1.5D, 2.0D, 2.5D, 3D,4D,5D,6D,7D-40D.Thickness--SCH10,SCH20 ... , papermaking, construction, etcSpecial design available as the requirement of customer] seamless pipe fittings SCH40