... so on.StandardsANSI B16.9 / 16.28, ASTM A53/A106, API 5L, ASME B36.10M---1996, DIN2605 / 2615 / 2616, ... /concentric reducers ;sprial welded steel pipe (SSAW),seamless steel pipe (SMLS) ,and LSAW pipe! The sizes: Pipe fittingType:elbows, reducers,tees, cross ... ; flat face(FF); threadedForged fittingsType:Elbow, Tee, Union, Cross, Coupling, Cap, Bushing, Plug, Swage Nipple, Hexagon Nipple,Nipple, Hexagon ...