1. The dry powder fire extinguisher should be placed in a ventilated, dry, cool and convenient place. The ambient temperature is -5°C-45°C. Should avoid high temperature, moisture and corrosive places, it can prevent the explosion of the dry powder fire extinguisher due to rigid body explosion and dry powder extinguishing agent caking and decomposition.
2. Check whether the dry powder cakes every six months and whether the carbon dioxide gas in the cylinder is leaking. When inspecting a carbon dioxide cylinder, the cylinder should be detached and weighed to determine whether the weight is the same as the value stamped on the cylinder. If it is less than 7 grams, it should be sent to the professional maintenance department for repair. In the case of pressure accumulators, check whether the pointer on the internal display is in the green area. If the pointer is in the red zone, the internal pressure has been leaked and cannot be used. The maintenance department should be promptly overhauled.
3, dry powder fire extinguisher must be recharged once opened, in the refilling, absolutely can not change the type of dry powder fire extinguishing agent, that is, sodium bicarbonate dry powder fire agent can not replace the ammonium phosphate dry powder fire extinguishing agent.
4. Before the refilling or extinguishers are shipped for 3 years, hydraulic pressure test should be conducted. In the hydrostatic test, the fire extinguisher cylinder and the pressure storage gas cylinder shall be separately tested. The pressure of the hydraulic test shall be the same as the pressure indicated by the decal or stencil on the fire extinguisher. The water pressure test can only be used again after passing the test.
5, maintenance must be trained and responsible person responsible for repair, refill should be sent to the professional maintenance unit.
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