Fireproof sleeve is a kind of sleeve made of high purity alkali free glass fiber coated with silicone rubber. The appearance of fire sleeve has been vulcanized, so it has excellent fireproof, moisture-proof and aging resistance, and the customer utilization rate is high.  So there are always fakes on the market, how can we know the quality of casing?  Xinmao teaches you a few points:  


First, after receiving the fire sleeve, watch whether the surface is smooth, whether there are impurities, whether there are scratches and scratches, if it is obviously flawed, try not to buy it.  

Two, check the internal glass fiber system, whether it is neat enough, if it is messy, without any rules, it is best not to choose, because such fire sleeve is certainly inferior products.  

Three, smell the smell of casing with their own sensitive sense of smell, high-quality fire casing should not be too obvious taste, so it can also be judged from this aspect.  

Four, ask the price, fire sleeve is a standard part, the price of the same specification will not differ too much, if the price is too cheap, it may be inferior sleeve, this can also be used as a method of judgment.  


Of course, these are only a part of the method, in the face of experts, some people can distinguish at a glance, so these only for a reference, detailed information can look for professional people to understand!