carbon steel reducing pipe flange 1.We have our own factory 2.Size:15~ ... ;DIN;ISO ProductFlange ,Steel flange,Carbon steel,carbon steel reducing pipe flangeSize15mm~600mmMaterialCarbon steel(20#,35#,45# etc),Stainless steel,Alloy ... is widely used in water conservancy, electricity, power plants, pipe fittings, industrial, pressure vessels etc. The product is anti-corrosion,acid and ...