Are there any standards for membrane-type explosion-proof doors in the flues of gas boilers?
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For gas boilers, when multiple units share one flue, is it necessary to install explosion-proof doors on that flue? The boiler room design codes state that explosion-proof doors should be installed, but the new codes do not require this. Also, are there any standards for the specifications of these explosion-proof doors?
Is 06R403 standard?
It’s something I’ve also always wanted to understand: some manufacturers install simple explosion-proof doors on the back of the boiler unit, but I personally think they’re useless.
Explosion-proof doors for the furnace and flue are required only for water-tube boilers of 75T or less that do not have a furnace safety automatic protection system. See Clause 3.22 of the 2020 version of the Pot Regulations for details.