PP pipes are mainly used in chemical industry, mining, electric power, pharmaceutical, environmental protection, petrochemical and sewage treatment and other fields. The advantages of PP pipe are wear resistance, anti-freeze cracking, anti-condensation, simple installation, long service life, etc. It is a non-toxic, hygienic and recyclable pipe type. Some characteristics of PP pipes: no rust, withstand PH value in a large temperature range, high concentration of acid and alkali corrosion in the range of 1 to 14; wear resistance, no scaling, uniform and smooth inner wall, small flow resistance, and no corrosion Scaling; reduce vibration and noise, excellent sound insulation, reduce vibration and noise caused by liquid flow; anti-freeze cracking, excellent elasticity, so that the cross-section of pipes and fittings expands with the liquid of frost heave without bursting; anti-freeze Condensation, less heat loss, poor thermal conductor, less condensation and less heat loss; simple installation, light weight, convenient operation, and solderability; long service life, up to 50 days under specified conditions of use year. There are two connection methods for PP pipes: hot-melt connection and electric fusion connection, both of which are suitable for connecting homogeneous PP pipes and fittings. Among them, the cost of electric fusion connection is high. In addition, there are two connection methods: flange connection and screw connection. Flange connection refers to the connection between flange fittings and PP flange sleeves, which are used for large-diameter pipe connections; screw connection refers to the connection between threaded pipe fittings and pp pipe fittings with metal thread inserts, suitable for small-diameter pipes connect.
