Relief Sizing Explosions of Gases and Vapors

The National Fire Protection Association has extensive codes that relate to fire and explosion prevention and protection for all major industries and/or occupations, for example [10, 26, 27, 33, 55]. NFPA Code No. 69 [55] 

Applied Process Design for Chemical and Petrochemical Plants 

TYPICAL EXPLOSION DETECTOR MOUNTED WITH FLEXIBLE STANDOFF HOSE S  

From NFPA-69 [55], extracted by permission. Design Pressure  

P = the maximum initial pressure at which the combustible atmosphere exists, psig R = the ratio of the maximum deflagration pressure to the maximum initial pressure, as described in Code Par 5-3.3.1 

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