PN1.6-16.0Mpa DN50~200mm Quoting Standards Design and Manufacture GB12235 Face to face/End to end dimensions to GB12221 Pressure-Temp Rating GB9131 or JB/T3595 or HG20604 Flange dimensions to JB/T74~90 or 9113 or HG20592~20635 Inspection and Test to JB/T9092 or GB13927