The following are some principles for the selection of building water supply pipes. Safety and reliability: This is the most important principle for building water supply, because the building water supply pipe is a pressure pipe. Once the water leaks and bursts, it will cause damage to the building and people's property. The pipes should be able to withstand vibration and shock, water hammer, thermal expansion and contraction, etc., and withstand the test of time, without leakage or burst; When comparing the quality of the pipes, the price of the pipes should be compared, and the construction and installation costs should be compared; hygienic: the pipes currently introduced to the market must meet the requirements of the national standard GB/T17219-1998, and have passed the nationally recognized testing department. Energy saving: any pipe from raw material extraction and synthesis, cadmium melting, machine rolling, and injection extrusion will consume energy. From a macro perspective, metal pipes consume more energy than plastic pipes, and heat is used in the compounding process. , The steel-plastic composite pipe of the spray composite process consumes more energy than the metal pipe, and the thick-walled pipe consumes more energy than the thin-walled pipe. In addition, the inner surface of the pipe with large roughness consumes more energy than the small roughness. The local plastic diameter of the pipe joint consumes more energy than the diameter, that is, the loss along the path and the local head is large. From the perspective of construction technology, the use of electric welding gas welding and hot melt connection consumes more energy than spraying twisted teeth; sustainable development: any kind of pipe can be used by people without fading, and the most important reason is that it can be recycled. Reuse and do not create new pollution.
