Ductile Iron Grooved Rigid Coupling

Grooved Rigid Coupling normally use for the firefighting works. This kind of Grooved Pipe Couplings normally can not move or adjust when connect two equal pipes.Ductile Iron Rigid Couplings are all good quality with excellent material. Material: Ductile Iron Casting, conforming to ASTM A536 65-45-12 Equal to QT450-12. Size:1-12"-12" Coating: 1.Painting  2.Epoxy  3.Dacromet  4.Galvanized Colour: 1.Red  2.Blue  3.White  4.Orange Packing: Carton on Pallets or as negotiation.