Cast Iron Pipe Fitting Hydraulic Quick Coupler Thread1.standard: BS, DIN ,NPT 2.ISO CIQ SGS 3 ... , crosses over, round caps etc.Cast Iron Pipe Fitting Hydraulic Quick Coupler:Product ItemMalleable iron pipe fittings: elbows, tees, sockets, bends, ... Strength>=33kg/mm2, Elongation>=8%,HardnessPressure: 25kg/cm2;Working Pressure: 16kg/cm2Chemical PropertiesC:2.4~2.9 Si ...