Our produced pipe material is the Coal Mine Polyethylene Pipe (KM) (hereinafter referred to as the pipe), which is used for water supply and drainage, spray, positive pressure ventilation, negative pressure ventilation, and gas drainage in coal mines. The reference working temperature for the pipe is 20℃, with the working temperature ranging from -10℃ to +40℃. There is a pressure reduction coefficient between 20℃ and 40℃, and the working pressure is the nominal pressure multiplied by the pressure reduction coefficient. The pipe material for gas drainage purposes must have a nominal pressure of not less than 1.0MPa.