CHAPTER 8. FIRE PROTECTION AND EXTINGUISHING SYSTEMS
Scope. This chapter provides guidance for the design and
chambers. Equipment and procedures currently in use to overcome fire hazards
peculiar to hyperbaric facilities are described and reviewed. The
requirements and guidance of this chapter are applicable to all U.S. Navy
chambers for occupancy by one or more persons and to chambers used to test
animals or equipment. Various codes and standards applicable to fire
protection in hyperbaric systems are listed.
Codes and Standards. The following is a list of National Fire
Protection Association (NFPA) codes and standards (Reference (1)) which are
applicable to hyperbaric systems, chambers, and buildings.
(1) NFPA No. 56D
(2) NFPA No. 70
National Electrical Code
(3) NFPA No. 13
Installation of Sprinkler Systems
(4) NFPA No. 53M
Oxygen Enriched Atmospheres
(5) NFPA No. 56A
(6) NFPA No. 701
Fire Tests, Textiles
(7) NFPA No. 50
Bulk Oxygen Systems
Also applicable are NAVFAC DM-8 Fire Protection Engineering (Reference (2))
and the U.S. Navy Diving Manual, NAVSEA 0994-LP-001-9012 (Reference (3)).
Requirements. All hyperbaric facilities of the U.S. Navy must
comply with the appropriate sections of the codes and standards applicable to
the specific type of installation. If there is a conflict between this
manual and any specific code, this manual will supersede for Navy systems.
Water Spray. A fixed water spray system shall be installed in all
chambers designed for occupancy by more than three people.
Sufficient spray nozzles shall be
provide uniform spatial coverage with horizontal and vertical
jets and a
minimum density at floor level of two gallons per square foot
For a horizontal cylindrical chamber, the floor is assumed to
be 1/4 diameter
up from the bottom.
Spray Duration. The minimum duration of application shall be 30
seconds with an additional 30 seconds reserve.