In the water supply and drainage piping system, the plastic pipe gradually replaced the cast iron pipe and galvanized steel pipe and other traditional pipes become the mainstream use of pipe. Compared with traditional pipe, plastic pipe has the advantages of light weight, corrosion resistance, small flow resistance, energy saving, easy installation, low cost and so on, which is favored by the pipeline engineering industry. At the same time, with the rapid development of the petrochemical industry, the continuous progress of plastic manufacturing technology, plastic pipe production increased rapidly, the variety of products more diversified.
HDPE pipe after PVC-u drainage pipe, become the world's second largest consumption of plastic pipe varieties. Transportation of gas should be used PE80 and PE100 grade of medium or high-density polyethylene pipe, water supply is usually used PE80 and PE100 grade of medium or high-density polyethylene pipe, PE63 has gradually become obsolete.