What is the temperature resistance of common pipes such as PE/PVC/PPR?

According to the different long-term use temperature, the materials can be divided into general-purpose plastics, general engineering plastics, high-temperature engineering plastics and ultra-high-performance engineering plastics.

 

According to the different long-term use temperature, the materials can be divided into general-purpose plastics, general engineering plastics, high-temperature engineering plastics and ultra-high-performance engineering plastics.

 

● General-purpose plastics: long-term use temperature below 100℃.

General-purpose plastics are the most widely used plastics in our daily life, including PE, PP, PS, PVC and ABS, which are usually used for packaging, daily necessities, pipes and toys.

 

● Engineering plastics: long-term use temperature of 100 ℃ to 150 ℃ or so

The five major engineering plastics include PA, POM, PBT, PC and PPO, usually used in mechanical parts, automotive, electrical and electronic fields.

 

● High-temperature engineering plastics: the use of temperature above 150 ℃

With high heat resistance and flame retardancy, as well as excellent mechanical processing performance, aging resistance, dimensional stability, can be used to replace metal materials, widely used in electrical and electronic appliances, aerospace, medical equipment, automotive, military fields.

 

 

Above to do a simple understanding can be, here we are on the plastic pipe industry common types of specific introduction:

 

First, PVC (polyvinyl chloride) pipe: -10 ℃ to 60 ℃

 

Generally speaking, the temperature resistance of PVC pipe ranges from -10℃ to 60℃. In this temperature range, PVC pipe can maintain good elasticity and mechanical properties, not easy to deformation or rupture.

 

 

Under high temperature environment, PVC pipe will gradually soften and lose its original elasticity and mechanical strength. When the temperature reaches above 80℃, PVC pipe may deform, expand or even rupture; when the temperature is lower than -10℃, PVC pipe may become brittle and hard, easy to break and crack. Therefore, when using PVC pipes in high and low temperature environments, appropriate protective measures need to be taken.

 

Second, PE (polyethylene) pipe: -60-60 ° C

 

PE pipe is a heat-resistant, low-temperature-resistant, corrosion-resistant pipe with a wide range of applications. Usually the maximum temperature resistance of PE pipe 90 ℃, can be used safely in the -60-60 ℃ temperature range, but PE pipe is mainly used to transport cold water, do not think that the PE pipe can withstand the temperature to 60 ° will be used as hot water pipe.

 

 

Third, PP (polypropylene) pipe: -20 ℃ to 70 ℃

 

PP pipe is a non-toxic, hygienic, high temperature resistant and recyclable pipe, mainly used for building indoor hot and cold water supply system, also widely used in heating systems. pp pipe use temperature in -20 ° c to 70 ° c, more than -20 ° c low-temperature pp pipe produce freeze cracks, high-temperature working environment as long as more than 70 ° c will produce decomposition.

 

 

Fourth, PPR (random copolymerization polypropylene) pipe: -10 ° C - 80 ° C

 

PPR pipe is UPVC water supply pipe, aluminum-plastic pipe, PE pipe, PE-X pipe, PE-RT pipe of the new generation of products. Because it uses random copolymerization technology, so that the strength of polypropylene, high temperature resistance is well ensured, so as to become the main force of water pipe materials.

 

 

PPR pipe is mainly divided into cold water pipe and hot water pipe, cold water pipe use temperature in -10 ℃ to 20 ℃, hot water pipe has excellent heat resistance, high temperature resistance temperature range between 60 ° C to 80 ° C. According to standard test methods, PPR pipe at a temperature of 70 ° C can continue to use for up to 50 years, and will not occur significantly melt, soften or deformation and other phenomena.

 

Five, ABS pipe: -20 ° C - 70 ° C

ABS pipe is an engineering plastic pipe made from acrylonitrile, butadiene, styrene three monomer copolymerization of resin, with high strength, high impact resistance, high hygiene performance and high resistance to aging. Ordinary ABS pipe use temperature range of -20 ℃ -70 ℃, after adding high temperature plasticizer modified ABS pipe temperature limit is generally around 90 ℃, and can even reach 100 ℃.

 

 

It is important to note that we are discussing common types of pipe here, and not all of them can be generalized. For example, CPVC chemical pipe in PVC and PE-RT pipe in PE pipe also have excellent high temperature resistance. As for the temperature range of the data, but also only as a reference value, if any friend has more authoritative data, also welcome to provide.