Malleable Iron Pipe Fitting – Union Details: Type: Malleable Iron Union,Flat Seat,without Gasket. Size: 1/4”to 6” Finish: Hot Dipped Galvanized, Black, Electro Galvanized, Usage: Fire Protection (Fire Fighting), plumbing, Oil,Gas,infrastructure construction, and decoration, etc. American Standard: Material: ASTM A-197 Dimension: ASME B16.3 16.14 Galvanization: ASTM A153 Threa... https://archpipes.com/Product/ansi-flat-seat-union-series/