GOST 12821-80 Welding Neck Flange

Stanadard: GOST 12821-80 Pressure: PN6, PN10,PN16,PN25,PN40,PN63 Size: DN10-DN1600 Type: Welding Neck Material: CS CT20, 16Mn, SS304/304L/316/316L/Duplex SS Coating: Rust-Proof Oil; Black/Yellow paint; Galvanized; Epoxy Coating