Polypropylene (PP-R) pipes and fittings for random copolymers have become “hot spots†in the application of hot and cold water, drinking water, and heating systems in buildings; PP-R pipes that are qualified for production must be raw and extruded. Out equipment has strict requirements. There are three kinds of PP raw materials that can produce hot and cold water pipes:
1, homopolymer PP Add a certain amount of toughening auxiliaries made by blending granulation, this material is called PP-H.
2, using PP and PE block copolymer, this material is called PP-B.
3, the use of advanced gas-phase copolymerization process, PE in the molecular chain of PP random and uniform polymerization, this material is called PP-R.
The screw barrel of the extruder used to produce the PP-R plastic tube is accurately calculated using an advanced computer model to determine the pressure distribution and melting rate of each section, so that it has a good low-temperature plasticizing ability. A conventional single screw extruder cannot be used to produce PP-R tubes.
Currently, 70-80% of PP-R pipes on the market are not real PP-R pipes. In order to help users to initially identify the authenticity of the PP-R pipe and fittings from the appearance and feel.
You can refer to the following points to identify methods:
1. Product Name: The product name of PP-R should be “PP pipe for hot and cold water or PP-R pipe for hot and cold water†and PP-R pipe or PP with ultra-fine particles. -R cold water pipes, PP-R hot water pipes, PP-E pipes, etc. All of the informal names are pseudo PP-R pipes.
2. The product testing unit is a non-professional unit. The content of the test item is inconsistent with the contents listed in the standard of the PP-R pipe. The product recommendation department or the product promotion department does not understand the PP-R product standard or does not have a PP-R standard. The certificates issued are pseudo-PP-R.
3. The density of pseudo PP-R is slightly larger than that of PP-R.
4, PP-R tube is white matte or other colors of matt, pseudo PP-R tube shiny bright or colorful.
5. The PP-R tube is completely opaque, and the pseudo PP-R tube is slightly translucent or semi-transparent.
6, PP-R tube feel soft, false PP-R tube feel smooth.
7, PP-R pipe landing sound more boring, fake PP-R pipe landing sound more crisp.
The real PP-R pipe shall comply with the standard ISO/DIS 15874.2-1999 «Plastic piping system for hot and cold water - PP part 2 pipe>> Pipe fittings shall comply with the standard ISO/DIS 15874.2-1999 «Plastics for hot and cold water Pipe system--PP part III pipe fittings;; The performance of pseudo PP-R pipes and fittings cannot pass the above standards. It should be pointed out that the service life of the pseudo-PP-R pipe is only 1-5 years, and the service life of the real PP-R pipe is more than 50 years.
In order to eliminate the use of non-standard PP raw materials and production equipment to produce PP-R pipe into the project, it is necessary to strengthen management of the standard building materials market, and to effectively monitor and control the factories and enterprises that specialize in PP-R pipe production.
1, homopolymer PP Add a certain amount of toughening auxiliaries made by blending granulation, this material is called PP-H.
2, using PP and PE block copolymer, this material is called PP-B.
3, the use of advanced gas-phase copolymerization process, PE in the molecular chain of PP random and uniform polymerization, this material is called PP-R.
The screw barrel of the extruder used to produce the PP-R plastic tube is accurately calculated using an advanced computer model to determine the pressure distribution and melting rate of each section, so that it has a good low-temperature plasticizing ability. A conventional single screw extruder cannot be used to produce PP-R tubes.
Currently, 70-80% of PP-R pipes on the market are not real PP-R pipes. In order to help users to initially identify the authenticity of the PP-R pipe and fittings from the appearance and feel.
You can refer to the following points to identify methods:
1. Product Name: The product name of PP-R should be “PP pipe for hot and cold water or PP-R pipe for hot and cold water†and PP-R pipe or PP with ultra-fine particles. -R cold water pipes, PP-R hot water pipes, PP-E pipes, etc. All of the informal names are pseudo PP-R pipes.
2. The product testing unit is a non-professional unit. The content of the test item is inconsistent with the contents listed in the standard of the PP-R pipe. The product recommendation department or the product promotion department does not understand the PP-R product standard or does not have a PP-R standard. The certificates issued are pseudo-PP-R.
3. The density of pseudo PP-R is slightly larger than that of PP-R.
4, PP-R tube is white matte or other colors of matt, pseudo PP-R tube shiny bright or colorful.
5. The PP-R tube is completely opaque, and the pseudo PP-R tube is slightly translucent or semi-transparent.
6, PP-R tube feel soft, false PP-R tube feel smooth.
7, PP-R pipe landing sound more boring, fake PP-R pipe landing sound more crisp.
The real PP-R pipe shall comply with the standard ISO/DIS 15874.2-1999 «Plastic piping system for hot and cold water - PP part 2 pipe>> Pipe fittings shall comply with the standard ISO/DIS 15874.2-1999 «Plastics for hot and cold water Pipe system--PP part III pipe fittings;; The performance of pseudo PP-R pipes and fittings cannot pass the above standards. It should be pointed out that the service life of the pseudo-PP-R pipe is only 1-5 years, and the service life of the real PP-R pipe is more than 50 years.
In order to eliminate the use of non-standard PP raw materials and production equipment to produce PP-R pipe into the project, it is necessary to strengthen management of the standard building materials market, and to effectively monitor and control the factories and enterprises that specialize in PP-R pipe production.
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