Copper pipe as a more common components in industrial production, you can go through three methods to determine the good and bad copper pipe
One: Observation
The quality of copper pipe can be judged by observation, we first look at the color of copper pipe, roughly divided into copper, brass. Under normal circumstances, the color of the copper pipe presents a single color, such as purple copper pipe, general color reddish basically can be concluded that is good, look carefully at the color 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 an indication of 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 some iron.
Third: tensile
When the appearance and simple test are qualified, the last inspection process is stretching. Processing and molding 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 a little force on the copper stretching. 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 the copper pipe is done poorly.
Copper pipe welding - copper pipe welding program:
Tools to prepare: welding torch, acetylene cylinder, oxygen cylinder, nitrogen cylinder. How to do: check whether the oxygen and acetylene bottles are enough. Welding according to the drawing requirements. When welding solenoid valve, remove the coil of solenoid valve to prevent damage and pay attention to its flow. When welding other parts such as liquid mirrors, expansion valves, check valves, etc., care should be taken to prevent heat damage during welding. If necessary, remove the removable parts and then wrap the welded valve body with a damp cotton cloth. During welding, low-speed nitrogen gas should be allowed to pass through the weld tube to prevent oxidation. After soldering, cool with dry nitrogen and clean the pipe of oxides and solder slag.
Copper pipe welding seems to be a very simple thing, but also need to master a lot of methods and techniques, with a strong technology, while the copper pipe welding needs to be trained in professional skills to know the process of copper pipe welding and related need to pay attention to, this ability to make the copper pipe welding possible, to avoid problems in the process of copper pipe welding.
