How to buy water pipes in decoration hidden projects

The selection and installation of water pipes in the renovation hidden project has become one of the issues that cannot be ignored. In order to make the appearance beautiful, people usually use the wall-type construction for the water pipe during the decoration. Once the water pipe leaks and bursts will bring irreparable consequences. In the past, the main supply for water supply was cast iron pipes. Sand cast iron pipes are mainly used outdoors, and galvanized iron pipes are used indoors. They can be divided into cold (electric) galvanized and hot galvanized. The galvanized pipe is used as a water pipe. After a few years of use, a large amount of rust is generated inside the pipe. The outflow of yellow water is not only polluted, but also contains bacteria that grow on the rough inner wall. Corrosion results in high levels of heavy metals in the water and seriously harms the human body. The state has stipulated to eliminate sand mold pipe fittings and cold galvanized cast iron pipes on June 1, 2000, and gradually restrict the use of hot-dip cast iron pipes, and promote the use of plastic composite pipes and new-type plastic pipes. Therefore, there are three major categories of pipelines currently in use. The first category is metal pipes, such as hot-dip cast iron pipes, pipes, tubes, etc. in plastics. The second category is plastic compound metal pipes, such as plastic compound steel pipes and aluminum plastic composite pipes. The third category is plastic pipes, such as PP-R (cross-linked polypropylene high density mesh engineering plastics).

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The state also stipulates that various pipes and fittings involving drinking water pipelines must be approved by the Ministry of Health.

(1) Aluminum plastic composite pipe

Aluminum-plastic composite pipe is one of the more popular pipe materials in the market, which is light, durable and easy to construct. Its flexibility is more suitable for use in China. The main drawback is that when used as a hot water pipe, due to long-term thermal expansion and contraction, it may cause misalignment of the snap-on connection and cause leakage. There are many varieties of aluminum-plastic composite tubes currently sold on the market, and the quality and price vary greatly. How to buy aluminum-plastic composite pipes has become a headache for consumers.

1 check the appearance of the product

The high quality aluminum composite pipe generally has a smooth outer wall. The logo, specifications, applicable temperature, and number of meters on the pipe wall are clearly identified. The manufacturer also prints the production number on the pipe wall so that the product quality can be monitored at any time; the product packaging is excellent and the packaging is excellent. All kinds of logos are also clear. Manufacturers' names, addresses, telephones, etc. are in a prominent position. The shoddy products generally have rough outer walls, unclear or incomplete labels, simple packaging, and unclear site or telephone calls.

2 aluminum layer can not be ignored

A good aluminum-plastic composite pipe has a lap joint at the aluminum layer, and the aluminum layer and the plastic layer are closely combined with no delamination phenomenon. The shoddy products have aluminum layers that are not welded, and some aluminum layers and plastic layers are often layered and not tight.

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