... layers, middle is steel layer. We use a special technology to bond the two plastic layers ... printing, dyeing and paper making, Building, Agriculture, Shipbuilding, water supply, drainage, gas, thermoelectricity engineering, food and liquid ... pipe for urban rural water supply in 21st century. Pipe Outer diameter (mm)Pipe Thickness (mm)Pipe Working pressure (MPa) [hot and cold water, special liquid]Pipe ...