When it comes to selecting high-quality PP-R water pipes, there are several key factors you should consider. The first thing to look at is the appearance of the pipe. A good PP-R pipe is usually soft and uniform in color, with no mottling or discoloration. While white is often seen as the best option, it's important to note that color alone isn't a reliable indicator of quality. PP-R pipes can come in various colors like gray, green, and yellow, and these are typically achieved through the use of color masterbatch. As long as the materials used are of good quality and properly processed, the color doesn’t affect the performance of the pipe. One of the main differences between genuine PP-R pipes and counterfeit ones is their opacity. True PP-R pipes are completely opaque, while fake ones may appear slightly transparent or semi-transparent. White PP-R pipes are typically made from pure raw materials, whereas those with other colors might contain recycled or low-quality materials. Additionally, the inner and outer surfaces of the pipe should be smooth, without any bubbles, dents, grooves, or impurities. Next, take a close look at the texture. Genuine PP-R pipes are made entirely from PP-R raw material, with no additives. This gives them a smooth, soft feel. On the other hand, fake products may feel rough or have an uneven surface, which could indicate the presence of impurities or lower-quality materials. The smell is another useful test. High-quality PP-R pipes should have no noticeable odor. If you detect a strange or chemical-like smell, it might be a sign that the pipe contains polyethylene or other inferior materials mixed in. Testing the hardness by pinching the pipe can also help. A real PP-R pipe is quite rigid and won’t deform easily when pressed. If the pipe bends or folds under light pressure, it’s likely not genuine. Wall thickness is another important factor. You can measure the wall thickness using a caliper to check if it meets standard specifications. Well-manufactured PP-R pipes follow strict national standards, so knowing these standards can help you make a better judgment. Listening to the sound when the pipe falls can also be helpful. A genuine PP-R pipe will produce a dull thud, while a fake one tends to make a sharper, crisper sound. Testing the elasticity by "tapping" the pipe can also reveal its quality. A good PP-R pipe will rebound well after being hit, while a poor one may break easily. However, it's worth noting that PP-R pipes can become brittle at temperatures below 10°C, so it's important to avoid extreme cold exposure. Burning a small piece of the pipe is another way to test its authenticity. A genuine PP-R pipe will burn cleanly, producing minimal smoke and leaving behind clear molten residue. In contrast, pipes with recycled plastics or impurities will emit black smoke and have a strong, unpleasant odor. Finally, checking the melting behavior during welding is essential. When properly welded, PP-R pipes should melt smoothly at around 260-290°C. If the material melts too quickly or hardens too fast, it may not be genuine. Another sign is how quickly the melted section cools down—PP-R has good thermal insulation properties, so it should cool more slowly than other materials. In addition, always check for proper inner diameter stability. A good PP-R pipe should not be easily deformed or stretched. Lastly, if possible, ask the manufacturer for official test reports. These include aging resistance tests, pressure tests, and impact resistance evaluations, all of which are required by national standards. Pay attention to the melt index of the raw materials as well, since this is a crucial indicator of quality and consistency.
Sealand is a trustworthy manufacturer of Gas Mass Flow Meter, Gas Mass Flowmeter, Gas Flow Meter, Gas Flowmeter, Gas Meter, ATEX, IECEx & CE approved.
The installation is as follows.
1. Installation Steps
valve location into consideration;
a) Sensor stays away from mechanical vibration source, for example, pump. Use flexible
pipe to connect meter with pipeline if inevitable. The housing of meter must be standalone,
out of touch with any other device. There must be 3 times the size of sensor between 2
sensors if there are many flow meters on the same pipeline, to avoid resonance.
b) Do not install sensor on pipeline that easily expands with hot and contracts with cold,
especially near expansion joint, which leads to a worse stability.
c) Sensor stays away from industrial electromagnetic field, such as large generator and
transformer, better 5m at least. Such device influences the performance of drive coil and
pickoffs. Make sure magnetic field intensity less than 400A/m.
d) Sensor shall be installed on lower pipeline, to be easily full of fluid.
f) Build a sunshade if the meter is under direct solar radiation.
g) Keep the meter from corrosive liquid.
Gas Mass Flow Meter, Gas Mass Flowmeter, Gas Flow Meter, Gas Flowmeter, Gas Meter Zhejiang Sealand Technology Co., Ltd. , https://www.sealandflowmeter.com
a) Choose correct installation site, taking installation area, pipeline, transmitter location &
b) Install the meter according to direction mark on sensor;
c) Install the sensor & transmitter on pipeline;
d) Connect transmitter & sensor with 9-pin cable;
e) Start.
e) Make sure Ex-mark meet application requirements if in hazardous area.