... quality and pr 1) ANSI/ASME B16.5 Steel flange,Blind flange,carbon steel flange2) Method:free forging,die forging,rolling3 ... on,Weld Neck,Blind,Lap Joint,Socket Weld,Threaded,5) Material: Carbon steel:A105,ST37.2,S235JR,Q235,P250GH Stainless steel ... Painting:depends on your require Rust-preventataive oil or black/yellow varnish or Galvanizing9) Quality control:Internal/ISO900110) Inspection:Internal/ ...