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Do you know the low temperature resistance of PE pipe?


Release time:

Jul 07,2019

The unique flexibility of PE drainage pipes also allows them to effectively resist underground movement and end loads. On the surface, strength and rigidity, plastic buried pipe than cement pipe and metal pipe, but from the practical application, plastic buried pipe belongs to the "flexible pipe", in the correct design and laying construction of plastic buried pipe is and the surrounding soil to bear the load. So widely used in building drainage, buried drainage pipe. Polyethylene is a non-inert material, in addition to a small amount of strong oxidants, can resist a variety of chemical erosion, and not easy to breed bacteria. It is well known that the reason why steel pipes and cast iron pipes are replaced by plastic pipes is not only because plastic pipes are better

The unique flexibility of PE drainage pipes also allows them to effectively resist underground movement and end loads. On the surface, strength and rigidity, plastic buried pipe than cement pipe and metal pipe, but from the practical application, plastic buried pipe belongs to the "flexible pipe", in the correct design and laying construction of plastic buried pipe is and the surrounding soil to bear the load. So widely used in building drainage, buried drainage pipe.

Polyethylene is a non-inert material, in addition to a small amount of strong oxidants, can resist a variety of chemical erosion, and not easy to breed bacteria. It is well known that the reason why steel pipes and cast iron pipes are replaced by plastic pipes is not only because plastic pipes have low energy consumption, low energy consumption, light weight, small water flow resistance, simple and rapid installation, low cost, long life, and heat preservation functions. It is also because plastic pipes have better corrosion resistance and are not easy to breed microorganisms than steel pipes and cast iron pipes. At the same time, it has good low temperature resistance.

The low-temperature embrittlement point of PE drainage pipe is -70 ℃, which is better than other pipes. Polyvinyl chloride (PVC-U) pipe is easy to crack when field construction in winter. One of the experiences summarized in the pilot project of laying polyvinyl chloride (PVC-U) buried water supply pipe in Beijing area of China is that the temperature below zero is not suitable for laying polyvinyl chloride (PVC-U) pipe. There is also an obvious proof that in order to improve the toughness and low-temperature impact resistance of PP, ethylene and propylene monomers can be copolymerized into random copolymerized polypropylene (PP-R), which generally adopts the process route and method of iPP to copolymerize the mixed gas of propylene and ethylene to obtain a copolymer with propylene and ethylene segments randomly distributed in the main chain (I. e. PP-R pipe material), the ethylene content in the PP-R tube material is mostly about 3%. However, the low temperature resistance of the improved PP-R is still unsatisfactory, and its embrittlement point is about -15 ℃, which is much higher than the embrittlement point temperature of -70 ℃ of the polyethylene pipe.

Domestic largePE pipe, PE water supply pipe production and sales manufacturers→ Shandong Yushun Pipeline Engineering Co., Ltd

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