Characteristics Of PVC Pipes Commonly Used in China

UPVC pipe: the larger application of UPVC pipe is the construction industry. At present, it is popularized and applied in the tap water pipeline system and residential tap water pipe in various provinces and cities across the country, and is mainly used as drainage pipe, rainwater pipe and threading pipe in the construction industry. Upv pipe has chemical corrosion resistance, self extinguishing and flame retardancy, good chemical resistance, smooth inner wall and good electrical performance, but UPVC pipe has low toughness, large linear expansion coefficient and narrow service temperature range. The development of UPVC pipe has obvious benefits. The production and use of UPVC pipe can save 55-68% energy than cast iron pipe, and the production and use of UPVC water supply pipe can save 62-75% energy than galvanized pipe. Moreover, the price per unit length of the same specification is only 1 / 2 of galvanized pipe, and the installation cost is 70% lower than galvanized pipe. The use of 1 ton of UPVC water supply pipe can replace 12 tons of cast iron pipe, and the application of 1 ton of UPVC corrugated pipe can save 25 tons of steel.

Core layer foam pipe: the core layer foam pipe is a new type of pipe produced by three-layer co extrusion process. The inner and outer layers are the same as the ordinary UPVC pipe, and the middle is a low foam layer with a relative density of 0.7-0.9. Its circumferential rigidity is 8 times that of the ordinary UPVC pipe, and it has good stability and heat insulation when the temperature changes. In particular, the foam core layer can cross block the transmission of noise, which is more suitable for the drainage system of high-rise buildings.

Compared with the solid wall pipe, the foamed core pipe can save more than 25% of raw materials, and the compressive capacity of the inner wall is greatly improved. For the core layer foam silencing pipe with several convex spiral lines on the inner wall, the water flows freely and continuously in a spiral shape along the inner wall of the pipe, and an air column is formed in the center of the drainage pipe, which reduces the pressure in the pipe by 10%, improves the general capacity by 10 times, increases the drainage capacity by 6 times, and the noise is 30-40db lower than that of ordinary UPVC drainage pipe.

PVC radial stiffened pipe: the production of this kind of pipe adopts special mold and forming follow-up device. It is a heavy-duty large-diameter super reinforced annular glassy pipe. The utility model is characterized in that the outer wall of the pipe is provided with radial stiffeners, which can greatly improve the ring stiffness and compressive strength of the pipe, and is especially suitable for drainage in municipal engineering.

Double wall corrugated pipe: the double wall corrugated pipe is made by extruding two concentric pipes at the same time, and then welding the outer pipe of the corrugated pipe on the copper pipe with smooth inner wall. It has smooth inner wall and corrugated outer wall, light weight and high strength. Compared with ordinary UPVC pipe, it can save 40-60% of raw materials. It is mainly used as communication cable protection pipe, building exhaust pipe and agricultural drainage pipe.

PVC transparent reinforced pipe: it is made by extrusion of inner and outer layers of plastic. There is synthetic fiber in the middle, which has good flexibility and can be bent. PVC transparent pipe has good acid resistance, alkali resistance, oil resistance and aging resistance. It can replace rubber pipe and is cheap. It is widely used for transporting nitrogen, oxygen, carbon monoxide and other gases as well as water, dilute alkali, oil and other liquids. It can also be used as a conduit for water heaters, spray, gas stoves, etc.

CPVC pipe: CPVC pipe is a kind of heat-resistant plastic pipe processed from chlorinated polyvinyl chloride with chlorine content of more than 66%. The heat-resistant temperature of CPVC pipe is more than 30 ℃ higher than that of UPVC pipe, and the dimensional stability is improved and the linear expansion coefficient is reduced. CPVC pipe has excellent heat resistance, aging resistance and chemical corrosion resistance, and does not deform in boiling water. It can be used for the transportation of hot water, corrosion-resistant liquid and gas. Domestic Yunnan dianhuai Technology Development Co., Ltd. produces CPVC pipes.