① TP2 is phosphorus deoxidized copper, containing 0.015-0.04% phosphorus, with good welding and cold bending performance, and is widely used in the manufacturing fields of air conditioning and refrigeration connecting pipes, stove gas connection pipes, electric heating pipes, etc.
② TU1 is oxygen-free copper, with a copper content of ≥99.97%, extremely low oxygen and impurity content, high purity, excellent electrical and thermal conductivity, good ductility, processing performance, welding, corrosion resistance, and cold resistance. Due to its high production requirements and high costs, its product price is much higher than other types of copper tubes.
③ T2 is pure copper, with a copper content of more than 99.90%. When users have higher electrical conductivity requirements for materials, T2 copper tubes will be the first choice.
TP2 copper can be used for air conditioning and refrigeration connecting pipes
Copper tube quality judgment method
1
In procurement, it is necessary to observe the color of the copper tube and make different color judgments according to the type of copper tube purchased. Like copper tubes, red copper with a reddish color is generally good copper. There are also brass tubes, which are generally better with lighter colors. Some inferior coppers can be broken into two pieces by bending them with your hands because of impurities inside. Don't buy them if there are black impurities inside.
2
Touch the inner wall of the copper tube with your hands to see if it is smooth and clean, and see if there are defects such as sand holes, oxidation, and cracks. If you are not sure, you can also scrape the copper tube with a sharp object. Generally, good copper tubes are made of pure copper and have better ductility, so high-quality copper tubes will have a deep line. After scratching the inside of the copper tube, if it is the same as the outer wall, it means that the overall quality of the copper pipe is relatively high. However, if the color or other aspects are different, it is very likely that some substances such as iron have been added to it.
3
Generally, the processed copper tubes are mainly divided into three types: hard, semi-hard, and soft. The flexibility of different forms is also different. Generally, it can be determined by bending the copper tube. High-quality copper tubes are very easy to bend, but if it is difficult to bend or cracks appear after bending, it means that the quality of the copper tube is not very good.
If you want to further determine the quality of the copper tube, you need to do a standard quality test. Like some chemical composition tests, professional instruments will have a much higher accuracy in judgment.
