This product used in coal mining, and falls into coal-mine used water pipes,air supply pipes, guniting and gas drainage pipes,etc. The quality conforms to standard CJ/T189-2007 & MT181. Quality Assurance: It is the first to get the certificate of 3.5Mpa Coal Mining Safty Mark of China. Its service life can reach over 50 years. Property Characteristics: 1>Light weight, long service life and easy installation. Its weight is lighter,while its service life is 8-10 times more than steel pipe. 2>Good anti-corrosion property, high pressure resistance, superior mechanical property, which is better than that of plastice pipe. It is widely used in piping project under different conditions. 3>Low noise in media transportation 4>Good sealing property. No leakage afer pressure testing. 5>Easy installation. The patented pipe fittings are developed ourselves. They are convenient to install and need no anti-corrosion treatment or welding work,which can reduce installation difficulty and save lots of working expenses under complex or special environment. 6>Flam-resisting and antistatic performance. Both of them meet the national standard. It can be used in flammable and explosive dangerous place. Bulk in container or negotiate with clients.