Three methods to distinguish the quality of brass tubes: outer layer, inner wall, bending
1. First look at the outer layer of the brass tube, try to scrape it with sharp things. Generally, the high-quality copper pipe can scrape out a deep line well, because the high-quality brass pipe is made of pure copper, and the copper has good elongation. Of course, this kind of good information is generally used in military industry or special industry.
2. Scrape the inner wall of the brass tube with a sharp tool. If the raw material scraped out is the same as the raw material scraped out on the surface, the whole raw material is not bad. If there is color difference or other things, there can only be one explanation. This kind of tube is made of poor raw material. Generally, things like iron are added to it.
3. Then bend the pipe hard. If it is a simple bend, it is generally better. If it is not bent well, or if it is bent, cracks will appear on the pipe wall in the future. Pay special attention to the inner wall. Once it appears, this kind of pipe is a poor pipe.
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