With the characteristics of rustless,nonscaling,smooth wall,and good hydraulic performance.Comparing with traditional iron casting pipe,the water transporting capacity can be increased 50%.The light self weight of the products,the convenient installing procedures and the moderate price can significantly reduced labor intensity and improve the effectiveness of 50%~60%.The products fully meet the health properties requirements of GB/T 17219,and the relevant health requirements issued by the department oh health.The product is conncted by expanding socket,eastic sealing ring.metal joints,and other variable commectivty to make the products have hydraulic resistance and higher performance of tensile strength ,bear the various pressure requirements(0.63~1.6MPa).Comparing with the traditional metal pipes,the new products can increase water supply capacty by 20%.It is widely used in construction projects and rural water supply projects recently.