Venting, of deflagrations

Venting of Deflagrations, NFPA 68, 1986 ed.. National Fire Protection Association, Quiucy, Mass. 

Venting of deflagrations is often nsed for overpressnre protection for process eqnipment, pipes and dncts. 

Vent or Relief Area Calculation [27] for Venting of Deflagrations in Low-Strength Enclosures... 

Reprinted with permission, NFPA Code 68, Venting of Deflagrations (1988) National Fire Protection Association, Quincy, MA 02269 [27], This reprinted material is not the official position of the National Fire Protection Association on the referenced subject which is represented only by the standard in its entirety. 

Figure 7-68. Maximum allowable length of a vessel vented at one end, or maximum distance between vents as a function of the vent diameter for the safe venting of deflagrations of dusts and gases. By permission, American Institute of Chemical Engineers, Meeting Mar. 6, 1988 by I. Swift (deceased) [56], with data from Ref. [54].

Other references include CCPS Guidelines for Engineering Design for Process Safety (Ref. 78) NFPA 68 Venting of Deflagrations (Ref. 79) NFPA 69 Explosion Prevention Systems (Ref. 80) NFPA 654 Prevention of Fire and Dust Explosions in the Chemical Dye, Pharmaceutical, and Plastics Industries (Ref. 81) and VDI 3673 Pressure Release of Dust Explosions (Ref. 82). 

Data from NFPA 68, Venting of Deflagrations (Quincy, MA National Fire Protection Association, 1994). 

Guide for Venting of Deflagrations Standard on Explosion Prevention System Standard for the Protection of Semiconductor Fabrication Facilities... 

Before designing enclosures for processes involving flammables, the consequences of poor ventilation that could concentrate the release above the lower flammable limit should be considered. Even if there are no ignition sources, continuously monitored combustible gas detectors should be placed in the enclosure. If all other sources of containment for flammables are inappropriate and enclosures are the only option, a means for extraordinary ventilation of even the smallest release should be provided. In addition, NFPA 68 (1994), Guide for Venting of Deflagrations, should be consulted... 

NFPA 68. Guide for Venting of Deflagrations National Fire Protection Association Quincy, MA, USA, 2002 Edition. 

---