|
When a water spray system is installed for outdoor vertical fixed-roof oil storage tanks, is every point on the tank exterior wall required to be within the coverage of water spray nozzles?
Or is it sufficient to arrange a ring of nozzles around the exterior wall, so that the sprayed water flows down the tank wall by gravity to achieve effective suppression? Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
5 Comments
For a flammable liquid pump surface area calculation method, NFPA 15 Section 7.3.2 says to calculate a projected prism with 5 sides or a projected plane at the footprint of the pump.
Paragraph states "projected surface" but it is not defined in the code. What is the projected surface? How should we calculate or determine the projected surface? Thanks in advance. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe We have a project using a deluge water spray system under NFPA 15.
We have installed 4 Fire department connections with 5" Storz inlet. Our client is asking us if the number of FDCs installed is sufficient as mentioned in NFPA 15 Section 6.4.3.3. My question is - how do we know that the number of outlets and size of the fire department connection is sufficient? How is that determined? Thanks in advance. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe We have a project where transformers are located on the periphery within a building's ground floor. There are 14 transformers within a single room. The life safety consultant has recommended for us to provide deluge system protection.
Is it required to provide a deluge valve for each transformer, or combine three or four transformers per valve? Also, how should sprinkler flow demand - is it calculated by each nozzle, or should we consider the entire transformer area for protection? Under NFPA 15 we have assumed 0.25 gpm/sqft (or 10.1 lmin/sqm). Thanks in advance. Posted anonymously for discussion. Discuss This | Submit Your Question | Subscribe |
ALL-ACCESS
SUBSCRIBESubscribe and learn something new each day:
COMMUNITYTop June '26 Contributors
YOUR POSTPE EXAMGet 100 Days of Free Sample Questions right to you!
FILTERS
All
ARCHIVES
July 2026
PE PREP SERIES |
RSS Feed
