What are the tips for purchasing PPR tubes?

Just buying a new house, many people are busy decorating their love nest. How to choose the right pipe at the right price is a very important thing for them. Here are a few tips to teach you how to distinguish the quality of the PPR tube.
1. "Touch": Whether the texture is delicate and the particles are uniform. PPR PIPE on the market mainly come in white, gray, and green colors. Under normal circumstances, recycled plastic cannot be made white, so many people tend to think that white is the best. In fact, this view is more one-sided. With the improvement of technology, color is not the standard for distinguishing the quality of PPR tubes. Whether the tube is good or bad, it seems that the problem cannot be solved. If you touch it, the coarse particles are likely to be mixed with other impurities.
2. "Smell": whether there is odor. The main material of PPR pipes is polypropylene. Good pipes have no odor, and poor ones have strange odors. It is likely that they are blended with polyethylene (ie, PE) instead of polypropylene.
3. "Pinch": PPR tube has considerable hardness, it can be squeezed into a deformed tube at will, it is definitely not a PPR tube.
4. "Smashing": A good PPR tube has good "resilience". It is too easy to smash because there are too many calcium carbonate fillers, which is naturally not a good PPR tube. PPR pipes that cannot be broken are not necessarily good pipes. The key is to look at the raw materials and processing technology.
5. "Burn": It is intuitive and useful when the ignition is started. PPR pipes mixed with recycled plastic and other impurities in the raw materials will emit black smoke and have a pungent odor; after a good material is burned, it will not emit black smoke and odorless, and the molten liquid is still very clean after burning.
6. According to the national testing standards, some simple testing items can be identified by the senses.