Insiders offer tips to identify the advantages and

2022-07-22
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Insiders offer tips to identify the advantages and disadvantages of PPR pipes

>& gt;& gt; Don't look at the live broadcast of PPR water pipe installation of youyou

at present, there are many brands of PP-R water pipes in the market, with mixed good and bad. Consumers can refer to the following methods to identify the advantages and disadvantages of various PP-R water pipes

at first glance: the color of high-quality PP-R water pipes is soft, bright and oily, while the color of low-quality PP-R water pipes is unnatural due to the mixing of low-quality plastic and even lime powder. The cut section is dry and oil-free, which feels like adding chalk ash

second touch: the inner and outer walls of high-quality PP-R water pipes are smooth without concave convex cracks, and the inner and outer walls of low-quality PP-R water pipes are rough with concave convex feeling

three weights: the weight of high-quality PP-R water pipes is heavier than that of poor quality PP-R water pipes. Because most of the high-quality PP-R metal pipe fittings have copper parts with more than three waterproof leakage grooves (copper content is more than 58%), the copper parts are longer in size and thicker in thickness, so the weight is heavier than that of high-quality PP-R pipe fittings.

four burns: the high-quality PP-R raw material is a hydrocarbon chain compound, and the flame temperature is higher than 800 degrees Celsius, Under ideal combustion conditions with sufficient oxygen, only carbon dioxide and water vapor are released during combustion, and there should be no odor and residue during combustion. Poor quality PP-R water pipes will have odor and residue during combustion due to mixing with poor quality plastic and other impurities. Consumers can cut sheets from PP-R water pipes and burn them with lighters to identify

1 the product name of real PP-R should be "polypropylene pipe for cold and hot water or" PP-R pipe for cold and hot water ". Those with informal names such as ultra-fine particle modified polypropylene pipe (PP-R) or PP-R cold water pipe, PP-R hot water pipe, pp-e pipe, etc. are pseudo PP-R pipes

2 the density of pseudo PP-R is slightly higher than that of real pp-r

3 the true PP-R tube is white matte or other colored matte, and the pseudo PP-R tube is bright or colorful

4 true PP-R tube is completely opaque, while pseudo PP-R tube is slightly translucent or semi translucent

5 true PP-R tube feels soft, while pseudo PP-R tube feels smooth

6 the landing sound of real PP-R tube is dull, and the landing sound of pseudo PP-R tube is crisp

it should be noted that the service life of pseudo PP-R pipes is only 1-5 years, while the service life of real PP-R pipes is more than 50 years

>& gt;& gt; Illustrated: PPR water pipe installation

precautions when purchasing water pipes:

1 Pay attention to the price comparison between water pipes and accessories

the ratio of general water pipes to fittings is (60% - 65%): (40% - 35%). Suppose you buy 1000 yuan of water pipe materials, of which the price of pipes is 600 ~ 650 yuan, and the price of accessories is 400 ~ 350 yuan

some water pipe dealers often attract customers' attention with very low pipe prices, and then raise the price of accessories to sell. This is bound to increase the price ratio of accessories, and sometimes the price of accessories will exceed 50% of the total price. Take the "inner wire elbow" in the accessories as an example, its price is generally equivalent to the price per meter of the pipe. If you buy a water pipe of about 9 yuan per meter, and the price of the inner wire elbow is usually not higher than 13 yuan. If the price of the inner wire elbow is 15 yuan, you should pay attention

2. When purchasing water pipes, we should take the specification of pipes as the premise

we must clearly express the brand, outer diameter and wall thickness of water pipes before making an inquiry. For example: how much is the price of 25*4.2 hot water pipe per meter

if you ask the price of hot water pipes in general, businesses will have the opportunity to play tricks, because 20*2.8, 20*3.4, 25*3.5, 25*4.2 water pipes can be sold to you as hot water pipes

3. When shopping around, pay attention to the comparison of the same specifications, based on the total price

when comparing prices, you can ask the merchant to budget the total price of water pipe materials for you. Then decide where to buy on the basis of the total price

precautions when shopping around: 1 Be sure to compare on the basis of the same specification. For example, you can't compare the 25*3.5 water pipe of brand a with the 25*4.2 water pipe of Brand B; 2. Try to compare the prices of products of the same brand and different merchants

4. After the purchase of water pipes, pay attention to the delivery of the merchants

once the transaction of water pipes is completed, be sure to carefully confirm the delivery of the merchants: whether the brand of water pipes is correct; Whether the wall thickness of the water pipe is correct; Whether the brand of accessories is consistent with that of pipes; Whether the quantity is consistent with the quantity on the delivery list; Whether the brand, outer diameter and wall thickness of the outlet pipe are clearly marked on the purchase list

in a word, when making an inquiry, ask the merchant to take out the physical samples to have a look, and when shipping, confirm whether the goods are consistent with the samples

5. Comparison between domestic PP-R products and imported PP-R products

since the late 1990s, China has entered a high-speed development period of PP-R raw material research and development and put into use. After years of experience accumulation, China's self-developed and PP-R production technology has long been mature. Under the premise of strictly implementing China's PP-R national standards, the product quality and performance of similar manufacturers should be similar

most PP-R pipes on the domestic market are produced with raw materials made in Nordic chemical industry, South Korea and China. Generally speaking, due to import tariffs, the prices of PP-R products produced with foreign raw materials and imported PP-R products will be higher

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