How To Identify PPR Pipes

Color, good PP-R water pipe color is soft and uniform, no noise. (PP-R pipes mainly include white, gray, purple, green, yellow, and blue. Consumers often think that white is the best. In fact, color is not the standard for judging quality. In fact, the quality of PP-R pipes is similar to that of PP-R pipes. The color of the water pipe has nothing to do with it. The plastic particles are mainly white and transparent (there are also other colors that have been added with masterbatch), as long as the masterbatch is added, any color can be produced, and the masterbatch will not be decomposed nor will it change the quality of PP-R , so it doesn't matter what color the water pipe is. According to the national regulations, the PP-R water pipe must have good light-blocking performance. In this regard, gray or other opaque properties will be better. But this advantage is only In the installation of open pipes and pipe wells, the water pipes of home improvement are all buried in the dark, so there is no such thing as gray is better than other colors. PP-R pipes are completely opaque, and pseudo PP-R pipes are slightly transparent. Or semi-transparent. White products can only be produced from pure PP-R raw materials. For example, the color of products produced by adding recycled materials, scraps, and scraps is not soft or uniform, while other color products processed with color masterbatch are added and recycled. materials, scraps, scraps, etc. will not affect the color of the product. This is why many manufacturers who focus on quality and home improvement retail are mainly white); The inner and outer surfaces of the product should be smooth and flat, no bubbles, obvious defects such as pits, trenches and impurities.

"touch" texture

A good PP-R water pipe is 100% PP-R raw material (without any additives). The texture is pure, the surface is smooth and the hand feels soft, and the pseudo PP-R pipe feels smooth. Generally speaking, the rough particles are likely to be mixed with impurities;

"smell" the smell

The main material of PP-R pipe is polypropylene. Good pipes have no odor, and poor pipes have a strange smell. It is likely to be blended with polyethylene instead of polypropylene;

"pinch" hardness

PP-R pipe has considerable hardness, and a pipe that can be deformed by pinching is definitely not a PP-R pipe;

"Quantity" Wall Thickness

In addition, vernier calipers can be used to measure whether the wall thickness of the pipe is up to standard and uniform. Generally, good pipes are produced in strict accordance with the national standard, but this method requires a certain understanding of the national standard for PP-R pipes.

"listen" to the sound

The sound of the PP-R pipe is dull, and the sound of the pseudo PP-R pipe is crisper.

"Smash" elasticity

A good PP-R pipe has good "resilience" and is easy to smash. Naturally, it is not a good PP-R pipe, but the best PP-R pipe can be smashed even if the temperature is lower than 10 degrees. However, strong hardness does not mean good elasticity. Some manufacturers increase the hardness by adding too many impurities such as calcium carbonate, which cannot be broken, and are easily brittle after a long time; (due to the cold brittleness of PP-R raw materials, performance in several temperature ranges Different: 10, -5, -23...)

"burning" smoke smell

The PP-R tube with recycled plastic and other impurities mixed in the raw material will emit black smoke and have a pungent odor. And good materials will not emit black smoke and odor after burning, and the molten liquid is still very clean after burning. (Also you can "pull", see its pull "length")

"melt"

The normal welding temperature of PP-R pipeline is in the range of 260-290℃. The welding quality will be better guaranteed during welding in this temperature range. If the welding parameters are under normal welding parameters, the product can easily enter the welding die during welding. And the welding pile is close to liquid, it means that the product is not produced by authentic PP-R raw materials, and if the welding pile can be quickly cooled and hardened (usually within 10 seconds), it can also indicate that the product is not authentic PP-R raw material This is because one of the characteristics of PP-R is that the thermal insulation effect is better, and its cooling rate will naturally be slower.

Check whether the inner diameter of the pipe is deformed and whether the pipe fittings are drawn. A good PP-R pipe cannot be drawn, and the inner diameter is not easily deformed.

"check"

Borrowing test equipment for testing can effectively distinguish the pros and cons of products. Several very important test requirements are specified in the national standard, such as the pipe aging resistance test (under the ring stress of 1.9MPa and the test temperature of 110°C, the test that keeps for 8760 hours without failure), the stability test of the piping system (hot and cold) 5000 cycles) and impact resistance test, etc., so the user can request the manufacturer or businessman to provide the above test report for verification. In addition, it needs to be pointed out that the national standard also has an important requirement for the raw materials used for pipes and fittings, which is the melt index. Greater than 0.5g/10min.