... ;DIN;ISO ProductFlange ,Steel flange,Carbon steel,carbon steel reducing pipe flangeSize15mm~600mmMaterialCarbon steel(20#,35#,45# etc),Stainless ... one order.Reducing pipe flange is widely used in water conservancy, electricity, power plants, pipe fittings, industrial, pressure vessels etc. ... American Standard, Russian Standard, JIS and so on.Nominal pressure: sch5s, sch10s, sch20s, sch30s, sch40s etc.