Light weight, convenient transport, loading and unloading – small density, convenient transport, loading, unloading and construction. Good corrosion resistance – excellent resistance to acid, alkali and corrosion. Low fluid resistance – smooth inner wall of the pipe, with only 0.009 in roughness coefficient in, the low fluid resistance, improves the waterpower condition of the pipe network effectively and decreases the fee of system operation. High mechanical strength – the pipe has good properties of pressure resistance, anti-impact and anti-tension strength. Simple and easy construction – rapid and easy connection and construction of the pipe with low construction cost. Low cost – the overall cost is low on account of the low price, convenient transport and construction as well as long service life. No influence on water quality – it is proved by the dissolution test that it is suitable to promote and use the product, which does not affect the water quality, in large areas.