What are the commonly used indoor plastic drainage pipes in the market, as well as the advantages and disadvantages?
The general situation of the PVC pipe because the price is low, without considering the impact water quality in the cold water supply system belongs to the first pipe, and when the temperature is high, can choose polyethylene pipe or cross-linked polyethylene pipe, polypropylene pipe, polybutylene pipe.
The application of drainage plastic pipes is simple, and the PVC is usually made of PVC. Its structure is various: core layer foamed pipe, hollow wall tube, spiral tube, core layer foamed spiral pipe, hollow wall spiral pipe.
The application of drainage plastic pipes is carried out in place of ordinary cast iron pipes. At present, drainage plastic pipes can be used in buildings under the height of 100m, but the progress in different areas is very uneven. When the building height is greater than or equal to 100m of high-rise buildings and unsuitable for drainage plastic pipe, flexible seismic drainage cast iron pipe can be adopted.
(1) the coefficient of thermal expansion is large, and the telescopic compensator is needed to solve it.(2) small stiffness, straight poor, need to encrypt the control card stand hanger to solve.(3) poor heat resistance, softening temperature is low, the need to limit drainage temperature, limiting the use of the place and control the distance from the heat source to solve.(4) flame retardance is poor, and the fire ring and fireproof sleeve need to be set up to cross the floor, the roof of the roof, the firewall and the lining of the pipe well.(5) resistance to mechanical impact is bad, so it is necessary to strengthen construction technology and solve it by careful construction.(6) the sound insulation is bad, the noise of the plastic pipe is larger than that of the cast iron pipe, the pipe is bright and the pipe position is close to the bedroom, the problem is particularly prominent. Noise reduction methods to improve the sound insulation effect of pipe material, core hollow wall pipe is developed based on this idea of the foaming tube; another way is to change the noise flow condition, spiral pipe is developed based on this idea. The idea of combining the two methods is the development of core layer foamed spiral tube and hollow wall spiral tube.
