Copper pipe, also known as copper pipe, is a kind of non-ferrous metal pipe. Copper pipe has good electrical conductivity and thermal conductivity. It is the main material for conductive accessories and heat dissipation accessories of electronic products and has become the main material for modern contractors in all residential commercial buildings. The first choice for installing water pipes, heating, and cooling pipes. Copper pipes have natural bactericidal and antibacterial functions, strong corrosion resistance, are not easily oxidized, are not prone to chemical reactions with some liquid substances, and are easy to bend and shape.
he processing of copper pipes includes the extrusion method, continuous casting, rolling, etc. The copper pipes produced are all seamless copper pipes.
1. Extrusion method
The extrusion process is suitable for the production of R410A copper straight pipe products with a diameter of ≥25mm. After the extrusion process, the product's secondary heating temperature can reach over 850°C to achieve complete recrystallization, making the product's grain structure dense and capable of withstanding pressure and deformation. The product process is complex, and due to the limitations of the extrusion production process, this process has certain limitations in the production of thin-walled copper coil products.
2. Continuous casting and rolling method
The continuous casting and rolling production process is suitable for the production of R410Aφ6.35-φ22.2 copper light tubes. The production process is short, the metal utilization rate is high, the energy consumption is low, the production process is highly mechanized and automated, the product processing varieties are many and the quality is good. , the copper pipes produced by the continuous casting and rolling method have stable performance, high production efficiency, greatly reduced internal leakage rate, and fully meet the requirements of users in the air conditioning and refrigeration industries, thus greatly promoting the widespread application of copper pipes.
Good copper pipe judgment?
1. Appearance
Generally, when purchasing, you need to observe the appearance of the copper pipe to judge. The first thing is to look at the color of the copper pipe. Make different color judgments according to the type of copper pipe purchased. For red copper pipes, generally red copper with a reddish color is good copper.
Check whether the inner and outer walls of the copper pipe are smooth and clean, and check whether there are blisters, oxidation, cracks, and other defects. Generally, good copper pipes are made of pure copper and have better extensibility, so high-quality copper pipes are A deep line will appear. After scratching the inside of the copper pipe, if it is the same as the outer wall, it means that the overall quality of the copper pipe fitting is relatively high.
2. Performance characteristics
Generally processed and formed copper tubes are mainly divided into three types: hard, semi-hard, and soft. Different shapes have different flexibility. Generally, they can be determined by bending the copper tube. High-quality copper tubes are very easy to bend. Yes, but if it is difficult to bend or cracks appear after bending, it indicates that the quality of the copper pipe fittings is not very good.
3. Comprehensive strength
To truly determine the quality of copper pipes, it is necessary to identify them by testing dimensional deviations, chemical composition, mechanical properties, process functions, grain size, eddy current flaw detection, etc., and whether they are directly supplied to air-conditioning manufacturers, which has greater market recognition. A high-end brand manufacturer.
