What is the shelf life of the fire hose?

In the event of a fire, in addition to using fire extinguishers to extinguish fires, lining fire hoses are commonly used. According to the building design fire protection code, all residential and office buildings are now equipped with various specifications of lining fire hoses.
The lined fire hose is a hose used to deliver high-pressure water or foam and other liquids to achieve the purpose of extinguishing fire. Earlier fire hoses were unlined woven linen hoses, which achieved the effect of preventing water leakage by absorbing water and swelling through the fabric, and then developed into latex and natural rubber linings. Modern lined fire hoses generally use polyurethane or synthetic The rubber contour has developed into a molecular synthetic material as the inner lining, and the outer belt blank is a high-strength chemical fiber fabric. The lined fire hose needs to be installed with a metal joint (interface) before use, so that another hose can be connected to extend the distance or a nozzle can be connected to increase the pressure of the liquid. According to the relevant national regulations: after using the lined fire hose once, it is necessary to replace it or go to the fire maintenance unit for maintenance. If it is not in use, the unit using the fire hose should perform a spot inspection at least once a year to ensure that the fire hose is not used. The normal use of fire fighting equipment. The reason is that the fire hose needs to withstand high water pressure during use. Long-term use will have a certain impact on the strength. If the storage time is too long, the inner wall adhesion, embrittlement and other material aging will occur.
The fire hose can be stored for a long time in a dry state at room temperature, no direct sunlight, no corrosive gas, etc. Generally speaking, natural rubber fire hose: shelf life of two years; high-quality PVC fire hose: shelf life of two years; polyurethane, epdm EPDM, nitrile/pvc (70%/30%), etc. have better aging resistance The shelf life of the fire hose can be more than five years.