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Is there no service life specification for fire hoses?

Update:14-05-2021
Summary:

Fire hose is a hose used to transport high-pressure wat […]

Fire hose is a hose used to transport high-pressure water or foam and other flame-retardant liquids. The traditional fire hose is lined with rafter rubber and the outer surface is wrapped with flax braid; the advanced fire hose is made of polymer materials such as polyurethane. There are metal joints at both ends of the fire hose. You can connect another hose to extend the distance or connect a nozzle to increase the liquid jet pressure.
Although the quality of the fire hose is relatively good, it prevents defective products from entering the market and causing hidden dangers such as fire rescue, but the fire hose also has a certain validity period. Once the validity period expires, a new fire hose needs to be replaced. How long is the service life of a fire hose, and is there any service life standard?
In fact, our country does not have clear regulations that fire hoses will be scrapped as many years as they reach. To determine whether the fire hose meets the fire-fighting requirements, it can be judged from the appearance of surface damage, whether the caliber and length are matched with the fire hydrant, and whether the inner material is aging or not. For details, refer to the current national product standard GB 6246-2011 "Fire hose ". It is recommended to replace the hose that has been used for 12 years. In daily management, after connecting part of the hose to the fire hydrant every six months, test the compressive strength and time. my country has not stipulated the replacement period for the time being, and it should be replaced in time according to the actual quality of the hose product.
Moreover, according to relevant national regulations, if the fire hose is used once, it must be replaced or maintained by a fire protection maintenance unit, and tested at least once a year because the fire hose needs to withstand high water pressure during use. If it takes too long, there will be internal wall adhesion and other situations-general rafter fire hose: shelf life of one year; PVC fire hose: two years; polyurethane fire hose: two years. Of course, this is only a reference value, depending on the product quality and usage. Finally, remind the storage environment that the temperature difference is small, 15 degrees Celsius is the best, there is no corrosive gas, etc., the storage time is longer.
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