[Code of Federal Regulations]
[Title 46, Volume 1]
[Revised as of Octobery 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR34.15-10]

[Page 451-452]
 
                           TITLE 46--SHIPPING
 
         CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY
 
PART 34_FIREFIGHTING EQUIPMENT--Table of Contents
 
       Subpart 34.15_Carbon Dioxide Extinguishing Systems, Details
 
Sec. 34.15-10  Controls--T/ALL.

    (a) Except as noted in Sec. 34.15-20(b), all controls and valves 
for the operation of the system shall be outside the space protected, 
and shall not be located in any space that might be cut off or made 
inaccessible in the event of fire in any of the spaces protected.
    (b) If the same cylinders are used to protect more than one space, a 
manifold with normally closed stop valves shall be used to direct the 
carbon dioxide into the proper space. If cylinders are used to protect 
only one space, a normally closed stop valve shall be installed between 
the cylinders and the space except for systems of the type indicated in 
Sec. 34.15-5(d) which contain not more than 300 pounds of carbon 
dioxide.
    (c) Distribution piping to the dry cargo spaces shall be controlled 
from not more than two stations. One of the stations controlling the 
system for the main machinery space shall be located as convenient as 
practicable to one of the main-escapes from the space. All control 
stations and the individual valves and controls shall be marked as 
required by Sec. 35.40-10 of the subchapter.
    (d) Systems of the type indicated in Sec. 34.15-5(d) shall be 
actuated at each station by one control operating the valve to the space 
and a separate control releasing at least the required amount of carbon 
dioxide. These two controls shall be located in a box or other enclosure 
clearly identified for the particular space. Systems installed without a 
stop valve shall be operated by one control releasing at least the 
required amount of carbon dioxide.
    (e) Where provisions are made for the simultaneous release of a 
given amount of carbon dioxide by operation of a remote control, 
provisions shall also be made for manual control at the cylinders. Where 
gas pressure from pilot cylinders is used as a means for releasing the 
remaining cylinders, not less than two pilot cylinders shall be used for 
systems consisting of more than two cylinders. Each of the pilot 
cylinders shall be capable of manual control at the cylinder, but the 
remaining cylinders need not be capable of individual manual control.
    (f) Systems of the type indicated in Sec. 34.15-5(d), which are of 
more than 300 pounds of carbon dioxide shall be fitted with an approved 
delayed discharge so arranged that the alarm will be sounded for at 
least 20 seconds before the carbon dioxide is released into the space. 
Such systems of not more than 300 pounds of carbon dioxide shall also 
have a similar delayed discharge, except for spaces which have a 
suitable horizontal escape.
    (g) All distribution valves and controls shall be of an approved 
type. All controls shall be suitably protected.
    (h) Complete but simple instructions for the operation of the 
systems must be located in a conspicuous place at or near all pull 
boxes, stop valve controls and in the CO2 cylinder storage 
room. On systems in which the CO2 cylinders are not within 
the protected space, these instructions must also include a schematic 
diagram of the system and instructions detailing alternate methods of 
discharging the system should the manual release or stop valve controls 
fail to operate. Each control valve to branch lines must be marked to 
indicate the related space served.
    (i) If the space or enclosure containing the carbon dioxide supply 
or controls is to be locked, a key to the space or enclosure shall be in 
a break-

[[Page 452]]

glass-type box conspicuously located adjacent to the opening.

[CGFR 65-50, 30 FR 16694, Dec. 30, 1965, as amended by CGD 74-100R, 40 
FR 6208, Feb. 10, 1975; USCG-1999-6216, 64 FR 53223, Oct. 1, 1999]