How long is the general service life of dry powder extinguishers? And under what circumstances will the dry powder fire extinguishers explode? Thank you
Service life of dry powder fire extinguishersReference standard: GA95-2007 "fire extinguisher maintenance and scrap regulations", the newly purchased fire extinguisher tank 5 years water pressure test 1 times, after the first test, every 2 years after the hydrostatic test 1 times, the tank 10 years compulsory scrap;Every time the hydraulic pressure test, which we usually said for powder, in fact there are fire extinguisher maintenance's approach is: the fire extinguishing powder is derived, drying in the drying machine, and then the fire extinguisher tank and tank pressure test finish after drying, and then dried powder poured into the tank.Both the new and old fire extinguishers, as long as in the daily inspection found no seals, under pressure, corrosion on the surface area of more than 30%, should be counted as accessory damage, failure, maintenance should be sent to the service unit.But at present, many fire extinguisher operators are confused, saying that the powder is changed 1 times a year, and there is no standard basis
The fire extinguisher is tank hydraulic pressure test, inspection of fire extinguishers tank reliability (the most effective measures to prevent the explosion), fire extinguisher factory tank pressure detection is generally 3.0Mpa (30KG pressure), fire extinguishers each maintenance test pressure is 2.5Mpa, fire extinguishers rushed drive internal filling nitrogen pressure generally about 1.5Mpa, so the hydraulic test pressure as the fire extinguisher the normal working pressure of 2 times, scrap directly without pressure test through the tank.The fire extinguisher is as long as the purchase of qualified manufacturers, each maintenance select qualified maintenance unit maintenance, fire extinguisher will not explode, is very safe. But the fire extinguishers are working temperature range, used in high temperature environment, or by external impact, corrosion corrosion and other factors leading to the tank, fire extinguishers may an explosion will occur.
