steel flange 1.size:1/2"-64" 2.PN:PN6,10,16, ... #, 2500#Wall thickness for welding neck flange: STD, SCH40, SCH80, SCH160. SCHXXSMaterial: carbon steel A105, stainless steel 304/304L, 316/316LCoating: black paint ... , 40KMaterial: carbon steel SS400, stainless steel SUS304, SUS316Coating : rust-proof oil, cold and hot galvanizePacking: sea worthy plywooden case, wooden pallet forged AS2129 flange