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永拓机电供应采购部刘小凤:如何辨别铜管优劣

来源：永拓机电更新时间：17-09-20

一般在采购中就需要观察铜管的外观来判断，首先就是看铜管的色泽了，根据购买的铜管类型做不同颜色判断，比如紫铜管，一般颜色泛红的红铜是好铜。黄铜管，一般颜色发浅的要好点。还有的铜上面镀了一层锌，有的镀锌，颜色发白的好点。还有一种劣质铜，铜管里面有杂质，用手一弯就断成了两截，里面有黑色杂质的就不要买。

其次就是用手摸一下铜管的内外壁是否光滑、清洁，看看有无砂眼，氧化，破裂等缺陷，如果不放心，可以用尖锐物品刮上面，一般好的铜管都是利用纯铜加工而成的，会有更好的延伸性，所以优质的铜管就会有一条深线出现。在铜管里面划了以后，如果和外壁是一样的，那就表明这个铜管件的整体品质是比较高的。但是如果颜色或者是其他方面不一样的时候，很有可能在里面一些添加了类似于铁这些物质。不过比较好的铜管用在军工业及其特殊行业的比较多。

再次一般加工成型的铜管，主要分为硬态、半硬态，软态三种，不同的形态柔韧度也有所不同，一般可以通过弯折铜管来确定，优质的铜管是非常容易弯掉的，但是如果很难弯折或者是弯折了以后会有裂纹出现的时候，表明铜管件的质量不是太好。

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