What is the difference between imported PPR water pipe and domestic PPR water pipe?

The main difference between imported PPR water pipe and domestic PPR water pipe is that the standards followed by the production water pipe are different, and the attitude towards the standard is also different in different countries. Some enterprises are on the deviation, some enterprises are on the writing deviation, are in line with the standard. PPR water pipe you want to say it has how high technology content in it, it is not necessarily, but you want to say that there is no good or bad, it is in Mongolia.

For the same pipe with nominal wall thickness of 4.2mm, there is such a big difference in the measurement results

For example, the wall thickness of water pipes is directly related to the pressure bearing capacity of water pipes. There are many cases like the above figure. Some may not have such a big gap, but there is still a gap between good brands and general brands. Some people on the Internet will say that the wall thickness of the water pipe has nothing to do with the pressure of the water pipe. That's bullshit. I don't know the product at all. The water pipe wall is thick and thin. Obviously, there is less material and lower cost. At worst, it is called cutting corners. However, as long as you meet the national standard, no one will say so.

Copper fittings, the gap is clear at a glance

About copper fittings this, generally in the home piping system will not be used too much, also on the faucet or some household appliances connection parts need to be used. As shown in the figure above, you can't see the difference in the thread part of copper fittings from the outside, but if you cut it open, you can see that the amount of copper used is not the same. In addition, some injection molding parts have problems in the injection molding process, which can affect the quality of water pipes.

After the internal wire copper parts are melted out, the weighing comparison shows that the quality is good or bad

Melt out the copper parts and make a weighing comparison. You will find that the gap between the inner wire copper parts of the good brand water pipe and the general brand is still quite large. If the weight difference of copper parts is very small, the problem may not be very big. They are all in the same level. If the gap is so large, the quality must not be of the same grade. In addition, copper fittings are divided into nickel plated brass and nickel plated brass. The cost of non nickel plated brass is higher than that of nickel plated brass.

Comparison of shading performance of different brands of water pipes

In addition, the shading of PPR water pipe can also see the gap between brands. If the water pipe with poor shading property is exposed to the sunlight for a long time, it is particularly easy to breed algae, and the water pipe is easy to scale. (now many stainless steel pipe enterprises take this as an example, and PPR pipes are not good. In fact, Tian Ji talks about poor quality PPR pipes.) However, now PPR water pipe is generally concealed, shading is not good, the impact will not be great. Although it is also stipulated in the national standard that the transmittance of PPR water pipe is much lower than 0.2%, in fact, most enterprises can not reach this standard, because this standard is not in the national standard, it is not a mandatory standard, but a recommended standard, so some enterprises are not very interested in this index.

PPR water pipe raw materials will directly affect the difficulty of welding, I believe that many brands of hot water pipe, experienced hydraulic master will have this feeling. Poor PPR raw materials will become thin and soft after scalding, if it is placed horizontally for a little longer, it will pour to the general. And the pipe made of high-quality PPR raw materials will not become soft after ironing, and the welding joint of the pipe will expand evenly, which is very easy to weld. Of course, welding mainly depends on the skill of the hydraulic master, and the skilled master may not care about these details, but from the point of view of the product, this factor greatly affects the welding quality.