NICET Special Hazards III case studies
NICET Special Hazards III · Put your knowledge to work in context.
NICET Special Hazards Systems is one of the certification programs listed under NICET's Fire Protection/Building Systems Programs. It is aimed at technicians who work with special hazard suppression technologies rather than the more common water-based sprinkler or fire alarm scopes, so it suits people whose day-to-day work involves designing, installing, inspecting, testing, or maintaining those systems. The NICET Special Hazards III case studies are 5 cases and about 3,403 words.
1Bladder-Tank Proportioning Failure and Fluorine-Free Foam Conversion
An aircraft maintenance hangar protects a 12,000 ft2 floor with a foam-water deluge system supplied by a bladder-tank proportioner and a 500 gal tank of 3% AFFF. The documented design basis is 1,400 gpm over the most remote four zones for 10 minutes.
735 words, about 4 min2Clean Agent Hold-Time Failure and Cold-Temperature Agent Shortfall
A 40 ft by 30 ft by 12 ft telecommunications room is protected by a Novec 1230 total-flooding system. The room has a 24 in.
692 words, about 3 min3CO2 Total Flooding in a Periodically Occupied Solvent Room
A printing plant protects a 4,200 ft3 solvent storage room with a CO2 total-flooding system: eight 50 lb cylinders on a manifold, a 34% design concentration, and a 60-second design discharge. The room is normally unoccupied but is entered several times per shift to move solvent drums.
669 words, about 3 min4Water Spray Transformer Submittal Review with Four Value-Engineering Cuts
An engineer submits a water spray fixed system for a new 20 MVA outdoor oil-filled transformer under NFPA 15. The submittal shows 0.30 gpm/ft2 applied to the 600 ft2 top projected area, 14 open nozzles at a 20 psi minimum, a wet pilot-line detection system with 1/2 in.
682 words, about 3 min5Kitchen Wet Chemical System After Unpermitted Appliance Changes
A restaurant has a 12 ft Type I hood over a gas range, two gas fryers, and a gas charbroiler, protected by a wet chemical system. Since the last semi-annual service, the owner replaced the 4-burner range with a 6-burner range and added a small gas griddle at the end of the hood.
625 words, about 3 min