china EN1092-1 mild steel flat face plate flanges manufacturersSize: DN15 - DN2000 (12" - 80"), Types: Welding neck, slip on, socket weld, thread, blind, plate, lap joint , orifice, etc.Material ASTM A105, ASTM A350 LF1, A350LF2, Q235B, 20#, 16Mn, ASTM A182 F304, F304L, F316, F316L, F321 etc. Manufacturing standard: ANSI, JIS, DIN, EN, BS4504, GOST etc.Face Raised Face (RF), Flat Face(FF), Ring-Type Joint (RTJ), Tongue-and-Groove (T&G), Male-and-Female (M&F)Surface treatment: Anti Rust Oil, Black Paint Coating, Yellow Paint Coating, Hot Dipped Galvanized, Cold Galvanized, etc. Packing: plywood case or pallet.Application Areas:.Gas Plants.Power Plants.Chemical Plants.Petroleum Industry.Metallurgy Industry.Ship-building Industry.Construction Industry