Copper pipe as a more common components in industrial production, you can judge the good and bad copper pipe through three methods
One: Observation
The quality of copper pipe can be judged by observation, we first look at the colour of the copper pipe, roughly divided into copper, brass. Under normal circumstances, the colour of the copper pipe presents a single colour, such as purple copper pipe, general colour reddish basically can be concluded that is good, look carefully at the colour of the adulteration, and even the appearance of impurities, basically concluded that the copper has impurities, belonging to the poor quality of the copper pipe.
Second: test
Good quality copper pipe must be made of pure copper, copper metal has a characteristic: good ductility. High-quality copper pipe will have a dark line appears, this dark line is not that it is a bit flawed in quality, on the contrary, it is that its ductility is very good.
In the purchase, you can also scratch a copper pipe inside, if the inner wall and outer wall is the same, it shows that the overall quality of the copper pipe fittings is relatively good. If the inner wall and outer wall is obviously a little different, then beware, the copper may contain a certain amount of iron.
Third: Tensile
When the appearance and simple test are qualified, the last test process is stretching. Processing and shaping of copper pipe, mainly divided into hard state, semi-hard state, soft state of three, different forms, show the flexibility is not the same you only need to slightly force the copper to stretch. Good quality copper pipe, is slightly easy to deform, on the contrary, very hard, or not easy to deform. Basically, you can conclude that the quality of copper pipe is done poorly.
