Michael Knott
Registered User
Do liquid nitrogen storage rooms need to be fire rated? According to 2016 NFPA 55 6.4.4, gas storage rooms need to be 1 hr rated, but it seems odd since nitrogen can be used as a fire extinguishing agent.
We are working on a lab project and liquid nitrogen dewars may be stored in the glass wash room. I just want to inform the architect if the walls need to be rated and will also need to provide fire dampers in our ductwork.1 hr rating isn’t hard to achieve. Why are you asking?
It will be liquid nitrogen which is cryogenic. The table shows no limit for an inert gas, but this is for control areas which are already fire rated areas according to Table 6.2.1.Looks like you start here:::
6.3.1.1 Threshold Exceedences.
Where the quantities of compressed gases or cryogenic fluids stored or used within an indoor control area exceed those shown in Table 6.3.1.1, the area shall meet the requirements for Protection Levels 1 through 5 in accordance with the building code, based on the requirements of 6.3.2.
And for nitrogen/ inert, appears NA across the board???
Keep in mind that bulk storage of any chemical could be a hazard to the occupant or first responder in an emergency, even if it is sometimes used as a fire retardant.Do liquid nitrogen storage rooms need to be fire rated? According to 2016 NFPA 55 6.4.4, gas storage rooms need to be 1 hr rated, but it seems odd since nitrogen can be used as a fire extinguishing agent.
That or fire heats the tanks, causing the blow-offs to ventilate, releasing the nitrogen which can asphyxiate.Explosive potential for compressed gas?
It will be liquid nitrogen which is cryogenic. The table shows no limit for an inert gas, but this is for control areas which are already fire rated areas according to Table 6.2.1.
under pressure, exposed to heat ="s boom? Danger to responders? sign required?Ok interesting
Have not done indoor cryogenic
Appears for inert. No Requirements
under pressure, exposed to heat ="s boom? Danger to responders? sign required?
Hi Michael,Do liquid nitrogen storage rooms need to be fire rated? According to 2016 NFPA 55 6.4.4, gas storage rooms need to be 1 hr rated, but it seems odd since nitrogen can be used as a fire extinguishing agent.