... 3.Standard:ANSI;BS;DIN;ISO ProductFlange ,Steel flange,Carbon steel,carbon steel reducing pipe flangeSize15mm~600mmMaterialCarbon steel ... combined with other items in one order.Reducing pipe flange is widely used in water conservancy, electricity, power ... and alkalis resistant, long service life.Connection: flange nut, bolt connection.Manufacturing standard: GB, American Standard, Russian Standard, ...