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PPR Pipe How To Identify

- Dec 19, 2017 -

Color, good PP-R hose soft and uniform color, no noise. (PP-R tube mainly lime green yellow, consumers often think that white is the best, in fact, the color is not good or bad quality standards, in fact, PP-R pipe with PP-R water pipe color There is no relationship between the plastic particles in white, transparent color (also have added Masterbatch other colors) as long as the color masterbatch plus what color can be produced, masterbatch will not be broken down will not change the PP-R quality, so the single In terms of what the color of the water pipe does not matter, according to national regulations PP-R water pipe to have a good closed light performance, gray or other opaque properties for this point will be better.But such advantages only in open pipe Installation and pipeline wells exist, home improvement plumbing all buried, so there is no gray to be superior to other colors.

PP-R tube completely opaque, pseudo PP-R tube slightly translucent or translucent. White products generally only use pure PP-R raw materials, such as recycled materials, waste, scrap products produced by its color is not soft and uneven, but with color masterbatch processing of other color products add recycled materials, waste, angle Material, etc. will not affect the product color. This is why the quality-oriented home improvement retail-based manufacturers are mostly white products); the inner and outer surface of the product should be smooth and flat, not allowed to have bubbles, obvious depression, groove and impurities and other defects.

"Touch" texture

Good PP-R pipe 100% is PP-R raw materials (without any added material) texture is pure, smooth surface, soft hand, pseudo-PP-R tube smooth feel, in general, rough particles are likely to be mixed with impurities;


PP-R pipe is the main material of polypropylene, good pipe odor, bad smell, it is likely to be mixed with polyethylene, not polypropylene;

"Pinching" hardness

PP-R tube has a considerable hardness, casually deformed tube can be pinned, certainly not PP-R tube;

"Volume" wall thickness

In addition you can use vernier caliper to measure, the pipe wall thickness is up to standard and uniform, the general good tube are strictly according to national standard production, but this method requires PP-R tube have a certain understanding of national standards.

Listens to the sound

PP-R pipe landing sound boring, pseudo-PP-R tube sound more crisp landing.

"Smashing" flexibility

Good PP-R pipe, "resilience" good, easy to smash nature is not good PP-R pipe, but the temperature is below 10 degrees, no matter how good the PP-R tube can also be smashed. However, the hardness is not equal to good elasticity, some manufacturers by adding too much calcium carbonate and other impurities to increase the hardness, how smashing broken, with a long easy to fragile; (due to PP-R cold brittle material in several temperature range performance Different: 10, -5, -23 ......)

"Burning" smoke odor

The PP-R tube, which is a mixture of recycled plastic and other contaminants, can emit black smoke and pungent odor. The good material will not only burn black smoke, odorless, burning, the melt out of the liquid is still very clean. (In addition you can "pull" to see its pull "length")


PP-R pipe welding normal welding temperature in the range of 260-290 ℃, in this temperature range of welding quality will be better guaranteed, if the normal welding parameters, the welding product can easily enter the welding die, And the fusion of the accumulation of liquid tumor has been close to the liquid that the product is not authentic PP-R raw material production, while the fusion of the accumulation of tumor if the rapid cooling can be hardened (usually within 10 seconds) also shows that the product is not authentic PP-R raw materials Production, which is due to one of the characteristics of PP-R insulation is better, the cooling rate will naturally be slower.

Pipe deformation is to see whether the pipe, the pipe is drawing, a good PP-R tube can not be drawing, the diameter is not easy to deformation.


Borrowing test equipment to effectively detect the advantages and disadvantages of the product. National standards set out several important test requirements of the data, such as pipe aging test (ring stress 1.9MPa, the test temperature 110 ℃, 8760 hours to maintain the test does not fail), pipe system stability test (hot and cold Cycle 5000) and impact resistance test, etc. Therefore, the user can request manufacturers or businesses to provide the above test report, in order to verify. Another need to be proposed is the national standard of pipe, pipe fittings used in raw materials also have an important requirement is the melt index, the national standard value for the melt index before and after processing changes in value can not exceed 30%, but also a requirement of the industry is the raw material melt index can not Greater than 0.5g / 10min.

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