carbon steel flange 1.Material:carbon steel 2.Size:DN15-DN1200 3.Type:WN,SW,SO,BL,RTJ,LJ,THR 4.Material:A105,Rst37.2 carbon steel flange1.Material:A105,Rst37.2,stainless steel 304/316/340L/316L2.Size:DN15-DN12003.Type:WN,SW,SO,BL,RTJ,LJ,THR4.Processing technic:forging5.Packing:poly-wooden case or pallet 6.Surface treatment:Rust-preventative oil,black painted. carbon steel flange