2-6.1 General. The venting of flammable vapors and pressure buildup from the discharge of quantities of carbon dioxide into closed spaces shall be considered. Venting of flammable vapors is covered in 2-2.1.4. The pressure venting consideration involves such variables as... read more

NFPA 12a for Halon

3-6 Altitude Adjustment. The design quantity of Halon 1301 shall be adjusted to compensate for altitudes of more than 3000 ft. (1000 m) above or below sea level and pressures that vary by 10 percent above or below standard sea... read more

NFPA 2001 Standard (1996 Edition)

StandardComments1-4.2.7 Where clean agent systems are used, a fixed enclosure shall be provided about the hazard that is adequate to enable the specified concentration to be achieved and maintained for the specified period of time.Large holes and/or duct leaks can... read more

NFPA 2001 Standard (2000 Edition)

StandardComments3-3 Enclosure3-3.1 In the design of a total flooding system, the characteristics of the protected enclosure shall be considered.3-3.2 The area of unclosable openings in the protected enclosure shall be kept to a minimum. 3-3.3 The authority having jurisdiction shall... read more

NFPA 2001 Standard (2004 Edition)

StandardComments5.3 Enclosure5.3.1 In the design of a total flooding system, the characteristics of the protected enclosure shall be considered.5.3.2 The area of unclosable openings in the protected enclosure shall be kept to a minimum.5.3.3 The authority having jurisdiction shall be... read more

NFPA standard, Annex C on Enclosure Integrity does not apply to CO2

CO2 is covered by the NFPA 12 standard which does not have the enclosure integrity test included in it as an appendix nor does it mention testing in that way in the body. Attempts have been made to include it... read more