... Parameters PN(Mpa): 1.6, 2.5, 4.0, 6.3, 10.0, 16.0, 32.0, 42.0, 70.0, class300, class400, class600, calss900, class1500, class2500DN(mm ... water tracing or ribbon heater tracing is required if below 0°C)Applicable medium:Petroleum, purified natural gas, sour gas, town ...