With the development of chemical construction materials the traditional construction pipe such as cast iron pipe, galvanized steel pipe and common steel pipe are gradually substituted by plastic pipe because of the easy corrosion causing pollution of water.

ABS tubes are a sort of common materials in the water system of air-conditioning Compared withgalvanized steel tubes, the economy of ABS tubes are pointed out in this paper.

The application of fastening connection galvanized steel conduit;