There are about 5000km’ tube and connection per year using Nylon 11 coating, which can be used in the corrosion proof for long terms, even suffer strong water, it still works and keeps the natural features of water. And also it can protect many parts while in the treatment of Water industry, replacing galvanization, chromeplate parts, valves, pumps and the connections used in the transmitting and treating drinking water or wastewater in the national water treatment