NFPA 68 is one of almost 300 NFPA standards that prescribe methods of Fire Protection. 


NFPA 68 calculates the minimum explosion relief door area needed to protect a structure from overpressures that would cause an explosion of that structure.


Click here if you need to protect your structure using NFPA 68


Related NFPA Standards:


NFPA 652: Standard on the Fundamentals of Combustible Dust The overarching NFPA standard for dusts. Published in October 2015 in order to promote awareness and focus attention on critical issues facing the dust collection industry. It includes completing a Dust Hazards Analysis (DHA) – retroactively – for any facility handling a combustible dust. 


NFPA 68 is part of a series of NFPA standards preventing and protecting structures from the effects of overpressure. Other important combustible dust Codes and Standards are:


NFPA 654 “Standard for the Prevention of Fire and Dust Explosions from the Manufacturing, Procession, and Handling of Combustible Particulate Solids” is the master document from which other Explosion avoidance standards are generated.


NFPA 61 “Standard for the Prevention of Fires and Dust Explosions in Agricultural and Food Products Facilities”


NFPA 69 “Standard on Explosion Prevention Systems”


NFPA 484 “Standard for Combustible Metals, Metal Powders and Metal Dusts”


NFPA 499  “Recommended Practice for the Classification of Combustible Dusts and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas”


NFPA 664 “Standard for the Prevention of Fires and Explosions in Wood Processing and Woodworking Facilities”



For additional information regarding the National Fire Protection Agency please visit


These standards may have been adopted in part or in total into the building codes in your municipality. See "A Sea of Codes, Standards, and Authorities" for more details

PSD Explosion Relief Doors meet the National Fire Protection Association's
NFPA 68 - Standard on Explosion Protection by Deflagration Venting 
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