PVC-U, PE, PPR pipe advantages and disadvantages
PVC-U, PE, PPR pipe advantages and disadvantages
PVC pipe can be a solid wall or structure wall to a variety of design and its connection to the main solvent bonding. Depending on whether the use of plasticizers can be divided into rigid polyvinyl chloride (PVC-U) and chlorinated polyvinyl chloride (PVC-C). Comparison of the two, corrosion resistance and high temperature resistance of PVC-C is relatively high, while the cost is relatively high.
PVC pipe has been widely used in water supply pipeline system and gas transmission pipeline system, but in recent years, PVC piping systems in the field of gas distribution market share to almost zero the amount of water supply system, a slight decline in PVC pipes in non-pressure piping systems such as drainage, sewerage and waste removal system in the amount of steady growth, mainly because the production of PVC raw material dependence on crude oil as other thermoplastics, production costs are relatively low.
PE pipe first appeared in the 1950s, the continuous development of the PE pipe materials to improve the performance of pipe and PE pipe in water supply systems, as well as gas transmission and distribution system in the amount of the driving force behind the rapid growth of. PE pipes are mainly used in drinking water transportation systems, natural gas transmission systems, irrigation systems, sewerage and drainage systems.
Although the PE piping systems do not have the cost advantage (relatively high prices of raw materials), but it has been the rapid promotion and popularization. This is mainly due to the quick and easy, safe and reliable connection of PE pipe, ie, the hot melt connection. PE material melting temperature range and melt viscosity characteristics of the PE pipe has excellent welding, so that the intensity of PE hot melt connectors meet or exceed the strength of the pipe body. Another use of PE fused connection pipe also allows the PE pipe system repair work becomes simple, thereby enhancing the safety and reliability of the pipeline.3.PP material from the 1970s used in the production of the pipe. The polymer structure of the different PP materials can be divided into PP-H (homopolymer PP), PP-B (polypropylene block copolymer) and PP-R (polypropylene random copolymer) three categories.
PP-R pipe system is an important one in the building with hot and cold water pipeline system. The country was once a boom promotion of PP-R plastic pipe systems, but unfortunately due to the interference of fake and shoddy products and substandard products, PP-R pipe market and sustainable development have not been well contrary gave the market to stay under the bad impression of the plastic pipeline is not durable, so that the water supply piping system architects and developers and square loss of faith in the plastic pipe. From a technical perspective, the substandard products of destruction are many reasons. The one hand, there is no qualified raw material, in the early stage of development of plastic pipe, practitioners thorough enough understanding of the long-term performance and strength of the raw materials, and also do not have a deep enough understanding of the method for the evaluation of raw materials; the other hand, the connection problem because the modulus of PP-R pipe, plastic pipe which be relatively large, so the joints prone to extra stress, especially the joints of the steel-plastic transition in hot and cold water cycle role for some time, it will frequently appear infiltration leakage
PVC pipe can be a solid wall or structure wall to a variety of design and its connection to the main solvent bonding. Depending on whether the use of plasticizers can be divided into rigid polyvinyl chloride (PVC-U) and chlorinated polyvinyl chloride (PVC-C). Comparison of the two, corrosion resistance and high temperature resistance of PVC-C is relatively high, while the cost is relatively high.
PVC pipe has been widely used in water supply pipeline system and gas transmission pipeline system, but in recent years, PVC piping systems in the field of gas distribution market share to almost zero the amount of water supply system, a slight decline in PVC pipes in non-pressure piping systems such as drainage, sewerage and waste removal system in the amount of steady growth, mainly because the production of PVC raw material dependence on crude oil as other thermoplastics, production costs are relatively low.
PE pipe first appeared in the 1950s, the continuous development of the PE pipe materials to improve the performance of pipe and PE pipe in water supply systems, as well as gas transmission and distribution system in the amount of the driving force behind the rapid growth of. PE pipes are mainly used in drinking water transportation systems, natural gas transmission systems, irrigation systems, sewerage and drainage systems.
Although the PE piping systems do not have the cost advantage (relatively high prices of raw materials), but it has been the rapid promotion and popularization. This is mainly due to the quick and easy, safe and reliable connection of PE pipe, ie, the hot melt connection. PE material melting temperature range and melt viscosity characteristics of the PE pipe has excellent welding, so that the intensity of PE hot melt connectors meet or exceed the strength of the pipe body. Another use of PE fused connection pipe also allows the PE pipe system repair work becomes simple, thereby enhancing the safety and reliability of the pipeline.3.PP material from the 1970s used in the production of the pipe. The polymer structure of the different PP materials can be divided into PP-H (homopolymer PP), PP-B (polypropylene block copolymer) and PP-R (polypropylene random copolymer) three categories.
PP-R pipe system is an important one in the building with hot and cold water pipeline system. The country was once a boom promotion of PP-R plastic pipe systems, but unfortunately due to the interference of fake and shoddy products and substandard products, PP-R pipe market and sustainable development have not been well contrary gave the market to stay under the bad impression of the plastic pipeline is not durable, so that the water supply piping system architects and developers and square loss of faith in the plastic pipe. From a technical perspective, the substandard products of destruction are many reasons. The one hand, there is no qualified raw material, in the early stage of development of plastic pipe, practitioners thorough enough understanding of the long-term performance and strength of the raw materials, and also do not have a deep enough understanding of the method for the evaluation of raw materials; the other hand, the connection problem because the modulus of PP-R pipe, plastic pipe which be relatively large, so the joints prone to extra stress, especially the joints of the steel-plastic transition in hot and cold water cycle role for some time, it will frequently appear infiltration leakage
