46 C.F.R. § 95.10-5 Fire pumps.
Title 46 - Shipping
(a) Vessels shall be equipped with independently driven fire pumps in accordance with Table 95.10–5(a). (b) On vessels of 1,000 gross tons and over on an international voyage, each required fire pump, while delivering water thru the fire main system at a pressure corresponding to that required by paragraph (c) of this section, shall have a minimum capacity of at least two-thirds of that required for an independent bilge pump. However, in no case shall the capacity of each fire pump be less than that otherwise required by this section. (c) Each pump shall be capable of delivering water simultaneously from the two highest outlets at a Pitot tube pressure of approximately 50 p.s.i. Where 1 (d) Fire pumps shall be fitted on the discharge side with relief valves set to relieve at 25 p.s.i. in excess of the pressure necessary to maintain the requirements of paragraph (c) of this section or 125 p.s.i., whichever is greater. Relief valves may be omitted if the pumps, operating under shut-off conditions, are not capable of developing a pressure exceeding this amount. (e) Fire pumps shall be fitted with a pressure gage on the discharge side of the pumps. (f) Fire pumps may be used for other purposes provided at least one of the required pumps is kept available for use on the fire system at all times. In no case shall a pump having connection to an oil line be used as a fire pump. Branch lines connected to the fire main for purposes other than fire and deck wash shall be so arranged that adequate water can be made continuously available for firefighting purposes. (g) The total area of the pipes leading from a pump shall not be less than the discharge area of the pump. (h) On vessels with oil fired boilers, either main or auxiliary, or with internal combustion propulsion machinery, where 2 fire pumps are required, they shall be located in separate spaces, and the arrangement of pumps, sea connections, and sources of power shall be such as to insure that a fire in any one space will not put all of the fire pumps out of operation. However, where it is shown to the satisfaction of the Commandant that it is unreasonable or impracticable to meet this requirement due to the size or arrangement of the vessel, or for other reasons, the installation of a total flooding carbon dioxide system may be accepted as an alternate method of extinguishing any fire which would affect the powering and operation of at least one of the required fire pumps. [CGFR 65–50, 30 FR 17001, Dec. 30, 1965, as amended by CGFR 66–33, 31 FR 15285, Dec. 6, 1966; CGD 95–028, 62 FR 51206, Sept. 30, 1997]
Title 46: Shipping
PART 95—FIRE PROTECTION EQUIPMENT
Subpart 95.10—Fire Main System, Details
§ 95.10-5 Fire pumps.
Table 95.10-5(a)------------------------------------------------------------------------ Gross tons Hose and Nozzle------------------------- Minimum hydrant orifice Length of number of size, size, hose feet Over Not over pumps inches inches------------------------------------------------------------------------ 100 \1\ 1 \1\ 1\1/2\ \1\ \1/2\ \1\ 50 100 1,000 1 1\1/2\ \5/8\ 50 1,000 1,500 2 1\1/2\ \5/8\ 50 1,500 ........... 2 \2\ 2\1/2\ \2\ \7/8\ \2\ 50------------------------------------------------------------------------\1\ On vessels of 65 feet in length or less, \3/4\-inch hose of good commercial grade together with a commercial garden hose nozzle may be used. The pump may be hand operated and the length of hose shall be sufficient to assure coverage of all parts of the vessel.\2\ 75 feet of 1\1/2\-inch hose and \5/8\-inch nozzle may be used where specified by § 95.10-10(b) for interior locations and 50 feet of 1\1/2\-inch hose may be used in exterior locations on vessels in other than ocean or coastwise service.
