Widely used in the construction of new drainage pipe

Posted by sanny111 on September 20th, 2014

(Photo by:5052 aluminum plate)
1.1 The composition of the raw materials of plastic pipe determines the characteristics of plastic pipe. The main advantages of plastic pipe: 
(1), chemically stable, free from environmental factors and the impact of pipeline components within the media, good corrosion resistance. 
(2) small thermal conductivity, low thermal conductivity, thermal insulation, energy-saving effect is good. 
(3) hydraulic performance, pipe, smooth wall, the resistance coefficient is small and difficult to fouling, tube flow area does not change with time, channel blocking probability small. 
(4) relative to the metal pipe, density, light materials, transport, easy to install, flexible, simple and easy maintenance. 
(5) may have a natural bent or cold performance, the coil supply means can be used to reduce the number of pipe joints. 
The main disadvantage of plastic pipe: 
(1) poor mechanical properties, impact resistance, poor, poor rigidity, straight sex was bad, and thus control the density of high cards and hanger. 
(2) flame retardant is poor, most of the combustible plastics, pyrolysis and combustion, it releases toxic gases and smoke. 
(3) coefficient of thermal expansion, flexible compensation must be very stressed. 
Performance of plastic pipes 
Physical properties 
The physical properties of plastic pipe. And aluminum-plastic composite pipe, steel pipe, copper pipe, plastic pipe channels the physical properties of the way, use, compensation measures and pipe insulation and so on. Such as: 
(1) PVC-U, PP, ABS relatively high mechanical properties, be regarded as "rigid control", install better tomorrow. On the contrary, PE, PE-X, PB as a "flexible tube" for Concealed. 
(2) the use of plastic pipes and heat resistance temperature determines the PVC-U, PE, ABS can only be used for cold water pipes, and PE-X, PP, PB may act as a hot water pipe. When building a water supply system and hot and cold water pipes when the heat resistance of a uniform as a major target. 
(3) plastic pipe due to thermal expansion coefficient is high, especially in the plastic pipe as a water pipe, with flexible interfaces, expansion joints or bends of various compensation measures such as more heat. Among them, PE, PP and other polyolefins most. If this is not the time construction and installation of adequate attention, and to take appropriate technical measures, is extremely vulnerable due to the interface of expansion joints and pull off the problem. 
(4) Since the low thermal conductivity, thermal insulation performance of plastic pipes superior in turn can reduce the thickness of insulation or no insulation. When different between the plastic pipe insulation of thermal conductivity of more than, but also with their respective wall thickness. 

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