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BS 6643-2:1985 Recharging fire extinguishers (manufactured to BS 5423 'Specification for portable fire extinguishers'). Specification for powder refill charges
standard by BSI Group, 08/30/1985
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Gives requirements and performance tests to establish equivalence of refill charges to the original powder.Cross References:
BS 5306:Part 3
BS 5423
BS 6535:Part 3
BS 6643:Part 1