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标题: [行业交流] PPR pipe and fitting knowledge
石志强
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发表于 2016-2-13 17:24  资料  个人空间  个人短信  加为好友  只看该作者 QQ
PPR pipe and fitting knowledge

1.What is PPR pipe

PPR pipe is short for Polypropylene Random Copolymer (Polypropylene Random Copolymer type 3) Pipe.
PPR pipe is made of Polypropylene Random Copolymer (PPR-C) approved for the production of pipes according to DIN8078 standards , specially developed for the use and construction of potable hot and cold water distribution systems in addition to a wide range of hydro sanitary application.

(PPR-C) is a thermoplastic resin which is transformed into the finished product by arise the temperature, which plasticizes the material, allowing the pipe to be produced by means of extrusion, and the fittings by mould injection.

2.PPR pipes Features

1)  Safe and convenient connection
The pipes and pipe fittings are easy to install and assemble, thanks to their excellent properties of lightness, ease of handling, workability and weldability.
2)  Opaqueness
The light transmittance of the pipe is much lower than 0.2%. This effectively prevents the algae and bacteria from growing and ensures the safety of the drinking water.
3)  Sound Insulation
The sound insulation of our pipe is better than the metal pipe. The TMECH ppr pipes and fittings reduces the vibrations of water flow and noise to no impact by the PPR high sound insulation and flexibility features. Such features also protect the system from any water hammering.
4)  Thermal Insulation
The thermal conductivity of PPR is only 1/200 of that of metal. Hence it does not require insulation to prevent heat loss
5)  Pressure Loss
PPR pipes and pipe fittings internal surface are uniform and free of roughness, which allows liquids to flow easily without formation of deposits and allow to reduce pressure losses to a minimum.
6)  Quality Assurance
The quality plan requires that inspections and tests are carried out on all finished products.
The results are documented in tests reports. Finished products are only released to stock
when all tests and inspections conform to the prescribed procedures and specifications
7)  The final inspection and test covers the following test procedures
Dimensional control
Surface finish
Impact bending test
Hydrostatic Pressure tests
Heat reversion test
Homogeneity of the material
Measurement of the melt


3.PPR pipes applications
1)  Compressed air pipelines
2)  Irrigation systems of gardens.
3)  Compressed air installations.
4)  Underground heating system
5)  Hot water recycling system
6)  Sanitary and pure water pipelines
7)  Drink manufacturing and conveying system
8)  Other industrial and agricultural pipelines
9)  Piping networks for swimming pool facilities.
10)  Piping networks for rainwater utilization systems.
11)  Chilled water networks in air conditioning systems
12)  Conveyor of industrial water and chemical materials
13)  Hot and cold potable water piping networks in residential and commercial buildings


4.PPR pipe Advantages
1)  PPR pipe is Non toxic
2)  PPR pipe is Corrosion resistance
3)  High impact strength and flexibility
4)  PPR pipe is Low thermal conductivity
5)  Resistant to a wide array of chemicals
6)  Resistant to corrosion as compared to metal products
7)  Very long lifetime with a guaranteed service life of over 50 years
8)  Damped vibrations and sounds are absorbed resulting to noise reduction
9)  Can be connected to any other materials used in existing installations
10)  Ability to perform over a wide temperature range, from very low to high temperature
11)  Environment-friendly as it takes less energy to manufacture PPR pipes and are recyclable compared to its metal counter parts
12)  Fast, simple, fusion-welding of pipes and joints which produces a uniform weld to generate absolute tightness of connections


5. PPR Pipe Selection:

For cold water (< 40o C) pipe, usually minimum PN 10 and PN 16 bars pipes are chosen.
For hot water pipe, minimum PN 20 pipes are chosen due to reduced material strength at higher temperature.

how to identify the quality of PPR pipes?

1.) View. There are mainly 3 colors including white, gray and green of ppr pipes and fittings in the market. Usually, manufacturers  can’t use recycle plastic to produce white color ppr pipes and fittings. But many people believe that white color is the best choice. With the development and technology improvement, ppr pipe color is not the only one standard to identify the quality.
2.) Touch. First touch the surface of the ppr pipe pipe by hand to experience the texture is delicate, the particles is uniform. Through touch, it may be found that those coarse pipes are likely to mix with other impurities.
3.) Smell. The raw material of PPR pipe is PPR-C, which should not smell bad. If the pipes have some bad smell, it could be some other material or mix with other material like PE or PP.
4.) Pinch. PPr pipe has high impact strength and considerable hardness, as can be easily deformed shape into the pipe, is certainly not a good PPR pipes.
5.) Smashed. A good PPR pipe should have high flexibility. Here we claim that the hardness of the pipe is not equal to high flexibility. Some unscrupulous manufacturers improve the hardness of pipe by adding excess calcium carbonate and other impurities, these pipe will break into pieces after some time.

6. PPR pipe Jointing Procedure

Thermal and electro fusion jointing is suitable for PPr pipes and fitting connection. Threaded and flange connection is used in connection with metallic part of the system like metal pipes and taps.

7. Installation tools and operation notes

Tools for PPr pipe installation includes thermal fusion hand tool and cart-type tool, pressure regulator for electrofusion, tool set for heating device, cutters and supports. The heating rate of the thermal fusion tool is usually 700-800 W for pipe less than 63 mm OD and 1200-1500 W for pipe with OD above 75 mm.

Article issued by Thomsun general Trading LLC, reproduced please indicate the source.

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