Hot steel pipe fittings: Size: 1/2"~72" Thickness:SCH20,SGP,STD,SCH40,SCH80,SCH160 Standard:ANSI B16.9/16.28 Production name45/90/180 long/short radius elbows, concentric/eccentric reducer, equal/reducer tee, caps, coupling, etc.Size range1/2-72,and from1/2-24 is seamless,from26-72is seam pipe fittingsscheduleSch5s,Sch10s,Sch10,Sch20,Sch30,STD,Sch40,XS,Sch60,Sch80,Sch100,Sch120,Sch140,Sch160, ...