This news, the attention of the public friends who have room decoration at home, in the stage of hydropower engineering, how to choose PP-R pipe? Is imported PP-R pipe better than domestic production? Many enterprises in the province are also producing PP-R pipes. What is their quality?
These questions can be found on the morning of November 8th at the press conference on the quality comparison of PP-R pipe products sponsored by Zhejiang Chemical Building Materials Association.
This tube product quality comparison activity was jointly carried out by Zhejiang Fangyuan Testing Group Co., Ltd. in conjunction with Zhejiang Chemical Building Materials Association. This time, a total of 44 batches of 44 enterprises in the province were sampled and tested, and 5 batches were rejected. Qualified products have been submitted to the local market supervision department for investigation and punishment according to law.
In addition, 10 batches of products were purchased from the building materials market for comparison, and 4 batches were rejected.
1] Will imported PP-R pipes be better than domestic ones?
PP-R pipe is not unfamiliar to everyone, except in home decoration, it is also widely used in urban and rural water supply and drainage, city gas, power and cable sheathing, industrial fluid transportation, agricultural irrigation and other fields.
The first point of this quality comparison that can eliminate everyone's doubts is that the province participated in the comparison of 39 batches of products, and found no use of recycled materials in pipes. That is to say, all the provincial production enterprises participating in the quality comparison have selected high-quality, new resin raw materials that meet the standard requirements, which guarantees the sanitary performance, physical and chemical properties of the pipes from the source.
Second, there are a total of nine major performance indicators for this event comparison. Among them, in order to test the hydrostatic test performance, that is, whether the pipe is free from cracking or leakage under the specified time and pressure, the test is upgraded from the “passing test” specified in the national standard to the “extreme failure test”, ie “ Test break time". The results of this test show that there are 10 short-term hydrostatic resistance ruptures of more than 10 hours in the province, the highest is 58.6 hours; 13 of the long-term hydrostatic resistance rupture time is more than 2000 hours, the highest is 3124 hour. From the test results, the indicators of enterprises in the province are far higher than the national standards.
Compared with similar products outside the province and abroad, in the static hydrostatic index reflecting the long-term performance of the pipe, the product rupture time of the province is 3124 hours, and the products outside the province are 1863 hours and 1245 hours respectively; The oxidation induction time of aging performance is 50.7 minutes for the company's products, and 31.1 minutes and 37.8 minutes for the provinces and foreign countries respectively. This shows that our products are in the most critical anti-hydrostatic performance, anti-aging and other projects with foreign and foreign well-known enterprises, such as Germany's Kusho, Germany's Lele, Pilsa, Jinniu, Rifeng tube, etc. They are better than them, and consumers can safely choose the products of excellent enterprises in the province.
2] PP-R pipe products, how to buy?
In the purchase of PP-R pipe products, experts give the following suggestions, citizens can refer to:
● look at the logo
First check the logo, whether the information is complete, and purchase the products with complete Chinese label and label information. Some products found in the market have no Chinese logo, and deliberately label foreign language as an import product.
●Look at the appearance
Look at the pipe wall is smooth, whether the color is soft and oily, the logo is complete or not, and there is no brand name on the accessories. Inferior PP-R water pipes are mixed with inferior plastic or even lime powder, the color is unnatural, the cut section is dry and oil-free, and it feels like adding chalk ash.
●Toughness
You can communicate with the merchant, choose the sample, lick it or try it with your foot to see if the water pipe is brittle. Good quality PP-R pipe has good toughness, can be easily bent without breaking, the pipe mouth can not be cracked, the inner and outer walls are smooth, no concave and convex cracks, and the inferior pipe is brittle, and the bend is broken, and the inner wall of the water pipe has a rough feeling.
●Pinch hardness
Do not think that the PP-R water pipe has good toughness, and its hardness will not work. The quality of the PP-R water pipe is quite good. The light can not be deformed by hand pinching. It can be kneaded into a deformed tube. It is definitely not a PP-R pipe. .
●Water pipe
Fire can also be used to identify the quality of the PP-R water pipe. Cut the flakes from the PP-R water pipe and identify them with a lighter. The high quality PP-R should have no odor and residue when burning. In addition, the good PP-R water pipe can maintain the hardness at high water temperature, while the inferior pipe is in the It is softened at 60 degrees water temperature.
●Outdoor wall mounted pipe, can not choose white pipe
Due to the high light transmittance of white pipe, it is easy to breed bacteria, and the outdoor wall-mounted pipe should adopt measures such as heat preservation, sun protection and anti-freezing. It should be treated with aluminum foil or anti-UV material to avoid accelerating aging and affecting service life.
● Should not blindly pursue foreign products
In this supervision sampling, it is found that the quality of foreign pipes is not necessarily far superior to the quality of domestic pipes, so you should not blindly pursue foreign products when purchasing.