How to distinguish the quality of copper pipes used in cold storage construction

How to distinguish the quality of copper pipes used in cold storage construction

1. Generally, you need to observe the appearance of the copper tube to judge during the purchase. The first is to look at the color of the copper tube. Different color judgments are made according to the type of copper tube purchased. For example, red copper tube, red copper is generally good. copper. Brass tubes are generally lighter in color. Some copper is coated with a layer of zinc, and some are galvanized, and the color is better. There is also a kind of low-quality copper. There are impurities in the copper tube, and it is broken into two pieces when it is bent by hand. Don't buy it if there are black impurities in it.

2. Secondly, check whether the inner and outer walls of the copper tube are smooth and clean, and see if there are any defects such as blisters, oxidation, cracks, etc. If you are not assured, you can scrape it with sharp objects. Generally, good copper tubes are made of pure Copper processing will have better extensibility, so high-quality copper pipes will have a deep line. After marking the inside of the copper pipe, if it is the same as the outer wall, it indicates that the overall quality of the copper pipe fitting is relatively high. But if the color or other aspects are different, it is likely that some substances similar to iron have been added to it. However, better copper pipes are used in the military industry and its special industries.

3. The generally processed copper tubes are mainly divided into three types: hard state, semi-hard state and soft state. The flexibility of different shapes is also different. Generally, it can be determined by bending the copper tube. The high-quality copper tube is very It is easy to bend, but if it is difficult to bend or cracks will appear after bending, it indicates that the quality of the copper pipe fittings is not very good.