What code or standard prescribes the location and/or number of heat / smoke / gas detectors needed for an industrial / chemical plant?
We have an open steel structure with processing equipment on most floors, which are essentially grating – no roof and no walls – containing flammable and toxic chemicals.
We’ve planned to place some detection in strategic spots downwind of the flare (southmost) and tankfarm (same flammables) and there are some single-story buildings and other outside equipment like a cooling tower, nitrogen generation, boiler – all downwind of the tankfarm and open structure mentioned.
So, some of all types where personnel could be in any area especially the lab/control room and electrical building mentioned above. The modular building supplier may have those taken care of but I need to check behind them.
The majority are outside and in the nine-story structure. I plan to have flame and gas detectors throughout depending on the correct guidance. Thanks in advance for your take!
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5/4/2023 09:26:08 am
Detection, suppression and other fire safety considerations for a chemical plant, like other industries, starts with local rules and requirements. Commonly referred to as regulatory requirements, legislation within State laws, AHJ regulations and local ordinances for permit and installation all form the primary rules for basis-of-design.
5/4/2023 09:46:01 am
As a further to the conversation above, if the placement of detection devices is not within the common requirements of NFPA or the manufacturer's instructions, it may be necessary to coordinate with engineers familiar with PSM hazard evaluations and the specific chemistries of the detectable products.
5/4/2023 11:20:58 am
Don't forget to review the requirements of ISA/IEC code. ISA-84 has a risk base methodology for fire and gas detector placement. Good sites are ISA.org, Kenexis.com, Micropack fire and gas for starters. As suggested above a PHA is critical and should be considered prior to detailed design.
Agree with above regarding specific regulation, but note that if you're in a jurisdiction that adopts the IFC/IBC, you should to assess the quantity of hazmats and see if you're above MAQs. If so, you'd be dealing with a group H occupancy, which has its own set of requirements for detection (especially since your hazmats are toxic and flammables)
5/10/2023 12:08:06 pm
John D. Thomas
5/10/2023 04:28:21 pm
IBC references the IFC for specific fire alarm requirements.
5/11/2023 11:20:52 am
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