Look at the appearance 
When buying plastic water pipes, first look at whether the color and gloss are even, and whether the outer wall of the pipe is marked with trademarks, specifications, temperature, pressure, production batch number, date of production, and actual origin; second, see if there is a health permit. Water pipes without a hygiene permit cannot be used for drinking water pipes. 
Smell Plastic water pipes are extruded from plastic raw materials through an extruder, and most plastic materials are non-toxic and tasteless. Unscrupulous traders will add regenerative toxic plastics to pipes in order to save costs or if their own technology is not up to standard. When consumers purchase, they can smell their water pipes with irritating odors. The plastic pipes with good quality should be free from any odors. 
Test performance A good quality plastic tube can be easily bent without breaking, PPR tube can even be bent into a circle, and poor quality plastic tube is more brittle and one bend is broken. Consumers can also take a small part of the plastic water pipe and put it in high temperature hot water. The plastic pipe with good quality will still maintain its original hardness, while the inferior water pipe will soften at around 60 degrees. 
Keep an eye out At the time of purchase, it is necessary to take note of the purchase of a regular agent authorized distributor of tube products in order to enjoy better installation services. Secondly, it is necessary to pay attention to whether the pipes and fittings purchased are produced by the same manufacturer. Different products have different expansion coefficients. Long-term use of increased risk of leaking; Third, pay attention to request product service cards, most water pipe manufacturers will have 50 years of warranty time. Edit Comment: Obviously it is a new building, but the sewer is always blocked; it was obviously renovated, but the ceiling was drenched and moldy; it was possible that your water pipe concealment project was not done! But wherever you can see, you have to take care. Household water pipe concealment projects need to do more.
Water pipe purchase
In plastic field, many suppliers know the material, but they know little about the machining.
Some other suppliers know about the machining, but they don't know the material properties. In the two situations, problems happen frequently.
If you have same problem, come to CHUNHUAN GROUP, we solve the problem for you perfectly. Experienced both in material and machining, customers are very glad to cooperate with us.
The machining process include below
1.Turning: For parts which have high surface requirement, wide-head cutters are better. When processing thin walled and soft material, cutters like knife are recommended.
2. Milling: When milling the surface, end-milling is more cost-effective than circular milling. For circular and forming cutter, it should have less than two cutter edges. In this case, the tolerance caused due to the edge vibration can be lowered to the minimum.
3. Sawing: Thin saws are usually used to saw thick parts to avoid the heating caused by friction. It would be better to use sharp and big sawblade.
4. Drilling: When drilling the solid materials, make sure to use sharp drill, otherwise the increasing pressure during drilling will cause material cracks.
Characteristics
-Work well between -260°C and 260°C
-Superior chemical resistance
-Very low coefficient of friction
-Longest aging life in plastics
-Good dielectric properties
-Non-toxic
-Non-stick
PTFE Parts,White PTFE Parts,Plastic PTFE Parts,Industrial PTFE Parts
ZHENJIANG CHUNHUAN SEALING MATERIALS CO.,LTD(GROUP) , https://www.chsealing.com