... ) [hot and cold water, special liquid]Pipe Working pressure (MPa) [gas]202.02.51.0252.52.51.0323.02.51.0403 ... as inCity building:water supply, heat supply pipeline backwater, natural gas, and combustion gas;Agriculture:Deep well pipe, Strainer, under drain conveying pipe ... , chemical, mining and rubber;Oil and gas field:For conveying Oil-polluted water, sewage in gas field, and the fuel-air mixture ...