PVC(Polyvinyl chloride) pipes are another kind of water supply system pipe, with the performance of lead free, acid resistance, alkali resistance, corrosion resistance, pressure resistance, high strength, light weight, low price, small fluid resistance and no secondary pollution etc. The PVC pipes are widely used in urban and rural indoor and outdoor water supply, rural water improvement, farmland irrigation, brine pipeline in industry, aquaculture water supply, mine ventilation, water supply and drainage, landscape sprinkler irrigation and other large and small projects.