In the face of a wide variety of copper pipe on the market at different prices, many people will seem helpless, in fact, we can simply judge the quality of copper pipe from several aspects
First, we have to observe its appearance through the eyes, color is the first element. For different copper pipe, the color it shows is not the same. As an example, such as purple copper pipe, normal purple copper pipe is generally reddish in color, if it is yellowish that is not a good copper pipe. The color of brass pipe is different from the purple copper pipe, its color is dark, light color is good.
Second, to determine whether it is poor quality copper, poor quality copper inside the non-copper content of many components, but also very mixed. As long as the hand force bending is very easy to break, on the contrary, good quality brand, copper pipe is not easy to deformation, also not easy to break. Inside is showing black, or gray copper pipe, can also be classified as poor quality copper pipe.
Third, touch the inner and outer walls with your hands. The touch of the inner wall is particularly critical, experienced people will take a sharp knife when choosing a brand of copper pipe, go to the side of the inner wall to scrape, generally good copper pipe is made of pure copper, there is bound to be very good ductility, in the inner wall there will be a dark line, the inner and outer wall as a whole looks exactly the same, you can conclude that this brand of copper pipe of superior quality. Wait a few minutes, the color difference between the inner and outer walls began to appear, it is likely to add some other substances, but the content of the addition is not high.
In the face of many copper pipe brands, we not only need to understand the production company, but also to face his products, to see whether his products are of excellent quality.
Classification of copper pipe
Copper pipe as the name suggests is copper after pressing or drawing made of copper. Copper pipe is divided according to the material specifically, there are three broad categories.
(1) Oxygen-free copper
Strictly speaking, oxygen-free copper is pure copper that does not contain oxygen or any deoxidizer residue. However, there is very little oxygen-free copper on the market in the true sense of the word.
Oxygen-free copper includes high-purity oxygen-free copper (TU0, TU1, TU2) and phosphorus deoxidized copper (TUP, TP1, TP2, etc.). Because of its excellent plasticity, ductility, thermal conductivity, solderability. Currently is widely used in the electronics industry, especially in the vacuum electronic components.
(2) Oxygenated copper
Oxygenated copper and oxygen-free copper is the biggest difference is that the oxygenated copper is formed by regenerative processing. Oxygenated copper can be categorized into ordinary pure copper (T1, T2, T3, etc.) and tough copper.
The resistivity of oxygenated copper is generally around 0.0185, while that of oxygen-free copper is around 0.0165. Therefore, in the advanced electronic components, the conductivity has high requirements, oxygenated copper is widely used.
(3) Specialty Copper
Specialty copper has a wide range of uses, there are arsenic copper, silver copper, tellurium copper which are categorized. Special copper production and oxygenated copper, oxygen-free copper has a great difference, it needs to add different trace alloying elements, in order to enhance the comprehensive performance of the purpose of the material.
Specialty copper has a wide range of uses, and is more common in high-speed rail supply line piping. It has the characteristics of high strength and high conductivity, wear and corrosion resistance, and high softening temperature. Adding chromium-zirconium and other metals, special copper also has higher safety, reliability, stability, energy saving, industrial, electrical, mechanical can be used.
