NICET Special Hazards case studies
NICET Special Hazards · Put your knowledge to work in context.
Special Hazards Systems is one of the certification programs NICET lists under Fire Protection/Building Systems Programs, alongside Fire Alarm Systems, Water-Based Systems Layout, and the Inspection and Testing of Fire Alarm and Water-Based Systems. It is aimed at technicians, designers, and inspectors who work with suppression systems for occupancies and hazards where standard sprinkler protection is not the intended solution - clean agent, carbon dioxide, foam, water mist, and comparable special hazard approaches. The NICET Special Hazards case studies are 5 cases and about 3,114 words.
1Data Hall Clean Agent System Fails the Door Fan Test
An HFC-227ea total flooding system protects a 14,400 ft³ data hall with a suspended ceiling and a raised floor. The stamped design drawings specify a 7% design concentration and a 10-minute hold time, and the flow calculation was accepted by the AHJ.
628 words, about 3 min2CO2 Total Flooding in a Room With a Conveyor Opening
A high-pressure CO2 total flooding system protects a 500 ft² dip-tank room in a metal finishing plant. The design concentration is 34%.
620 words, about 3 min3Extending a Foam System From Diesel to Methanol
A terminal stores diesel in a 40,000-gallon fixed-roof tank protected by a fixed foam system with a 3% AFFF bladder tank, a listed foam maker, and a foam dam at the tank shell. The owner adds a 30,000-gallon fixed-roof tank holding 95% methanol roughly 25 ft away and directs the contractor to extend the same foam main and use the same AFFF concentrate.
613 words, about 3 min4Restaurant Adds Appliances to a Wet Chemical Hood System
A fast-food restaurant has a wet chemical system protecting a hood over two fryers and a griddle. The owner replaces the griddle with a larger model and adds a third fryer, and simultaneously installs a higher-CFM exhaust fan.
624 words, about 3 min5Water Mist System With a Changed Enclosure
An industrial plant has a water mist system protecting a 6,000 ft³ machinery space, installed under a manufacturer's listed design that specifies a particular mist nozzle, specific spacing, and a 145 psi minimum pressure at the most remote nozzle. Water comes from a dedicated electric pump drawing from a break tank.
629 words, about 3 min