Product Description   Product Description 1nuo /YINUO Pipe Fittings Standard Grooved Pipe Fittings grooved coupling production process A rough castings of grooved fittings will be processed and produced by electric-furnice smelting,on-line monitoring and control and automatic molding methods. Product Parameters 1. High Pressure Coupling Specification: Size Pipe O.D Working Pressure Bolt Size mm/in PSI/MPa No.-Size … Continue reading China best FM Approval Ductile Iron Rigid Coupling (165.1mm/6 Inch)