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The shelf life of the lined fire hose

The shelf life of the lined fire hose

(Summary description)In the event of a fire, in addition to the use of fire extinguishers to extinguish the fire, the most commonly used are lining fire hoses. According to the fire protection code of building design, all residential districts and office buildings are now equipped with various specifications of lining fire hoses. So, how long is the shelf life of the fire hose?

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In the event of a fire, in addition to the use of fire extinguishers to extinguish the fire, the most commonly used are lining fire hoses. According to the fire protection code of building design, all residential districts and office buildings are now equipped with various specifications of lining fire hoses. So, how long is the shelf life of the fire hose?

Lined fire hose is a hose used to deliver high-pressure water or foam and other liquids to achieve the purpose of extinguishing fire. The earliest fire hose was an unlined linen woven hose, which achieved the effect of preventing water leakage by absorbing water and swelling by the fabric, and then developed to be lined with latex and natural rubber. Modern lined fire hoses generally use polyurethane or synthetic rubber. The 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 it can be connected to another hose to extend the distance or to connect a nozzle 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, and long-term use will have a certain impact on its strength. If it is stored for too long, it will also cause material aging such as internal wall adhesion and embrittlement.

The fire hose can be stored for the longest time in a dry state at room temperature, no direct sunlight, no corrosive gas, etc.

Generally speaking, natural rubber fire hose: two-year shelf life; high-quality PVC fire hose: two-year shelf life; 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.

The above is a specific introduction about the shelf life of fire hoses. From the above introduction, fire hoses need to be inspected and maintained regularly. Now the shelf life of fire hoses in the domestic market is generally about one to two years, which is not very long. Therefore, for safety considerations, it is recommended to maintain and replace fire hoses.

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