carbon steel reducing pipe flange 1.We have our own factory 2.Size:15~600mm 3.Standard:ANSI;BS;DIN;ISO ProductFlange ,Steel flange ... ,Carbon steel,carbon steel reducing pipe flangeSize15mm~600mmMaterialCarbon steel(20#,35#,45# etc),Stainless steel,Alloy steel,etcTypereducing flangePressure150lb ~ 3000lbStandardANSI,BS ...