Loading (50 kb)...'
(continued)
(c) The space containing the cylinders shall be properly ventilated and designed to preclude an anticipated ambient temperature in excess of 130 degrees F.
(d) Cylinders shall be securely fastened and supported, and, where necessary, protected against injury.
(e) Cylinders shall be so mounted as to be readily accessible and capable of easy removal for recharging and inspection. Provisions shall be available for weighing the cylinders.
(f) Where subject to moisture, cylinders shall be so installed as to provide a space of at least 2 inches between the flooring and the bottom of the cylinders.
(g) Cylinders shall be mounted in an upright position or inclined not more than 30 degrees from the vertical. However, cylinders which are fitted with flexible or bent syphon tubes may be inclined not more than 80 degrees from the vertical.
(h) Where check valves are not fitted on each independent cylinder discharge, plugs or caps shall be provided for closing outlets when cylinders are removed for inspection or refilling.
(i) All cylinders used for storing carbon dioxide must be fabricated, tested, and marked in accordance with §§147.60 and 147.65 of this chapter.
[CGFR 6550, 30 FR 16940, Dec. 30, 1965, as amended by CGD 84044, 53 FR 7748, Mar. 10, 1988; USCG19996216, 64 FR 53226, Oct. 1, 1999]
§ 76.15-25 Discharge outlets.
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(a) Discharge outlets shall be of an approved type.
(b) [Reserved]
§ 76.15-30 Alarms.
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(a) Spaces which are protected by a carbon dioxide extinguishing system and are normally accessible to persons on board while the vessel is being navigated, other than paint and lamp lockers and similar small spaces, shall be fitted with an approved audible alarm in such spaces which will be automatically sounded when the carbon dioxide is admitted to the space. The alarm shall be conspicuously and centrally located and shall be marked as required by §78.479 of this subchapter. For systems installed on or after July 1, 1957, alarms will be mandatory only for systems required to be fitted with a delayed discharge. Such alarms shall be so arranged as to sound during the 20 second delay period prior to the discharge of carbon dioxide into the space, and the alarm shall depend on no source of power other than the carbon dioxide.
(b) [Reserved]
§ 76.15-35 Enclosure openings.
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(a) Where mechanical ventilation is provided for spaces other than cargo and similar spaces which are protected by a carbon dioxide extinguishing system, provisions shall be made so that the ventilation system is automatically shut down with the operation of the system to that space.
(b) Where natural ventilation is provided for spaces protected by a carbon dioxide extinguishing system, provisions shall be made for easily and effectively closing off the ventilation.
(c) Means shall be provided for closing all openings to the space protected from outside such space. In this respect, relatively tight doors, shutters, or dampers shall be provided for openings in the lower portion of the space. The construction shall be such that openings in the upper portion of the space can be closed off either by permanently installed means or by the use of canvas or other material which is normally carried by the vessel.
§ 76.15-40 Pressure relief.
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(a) Where necessary, relatively tight compartments such as refrigeration spaces, paint lockers, etc., shall be provided with suitable means for relieving excessive pressure accumulating within the compartment when the carbon dioxide is injected.
(b) [Reserved]
[CGFR 6550, 30 FR 16940, Dec. 30, 1965, as amended by CGFR 6633, 31 FR 15283, Dec. 6, 1966]
§ 76.15-90 Installations contracted for prior to November 19, 1952.
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(a) Installations contracted for prior to November 19, 1952, shall meet the following requirements:
(1) Existing arrangements, materials, and facilities previously approved shall be considered satisfactory so long as they meet the minimum requirements of this paragraph and they are maintained in good condition to the satisfaction of the Officer in Charge, Marine Inspection. Minor repairs and alterations may be made to the same standards as the original installation.
(2) The details of the systems shall be in general agreement with §§76.155 through 76.1540 insofar as is reasonable and practicable, with the exception of §76.155(d) (1) through (3) covering spaces other than cargo spaces, which systems may be installed in accordance with paragraphs (a) (3) through (6) of this section. However, the foregoing exception shall not be permitted for vessels on an international voyage.
(3) In boilerrooms, the bilges shall be protected by a system discharging principally below the floor plates. Perforated pipe may be used in lieu of discharge nozzles for such systems. The number of pounds of carbon dioxide shall be equal to the gross volume of the boiler room taken to the top of the boilers divided by 36. In the event of an elevated boilerroom which drains to the machinery space, the system shall be installed in the engine room bilge and the gross volume shall be taken to the flat on which the boilers are installed.
(4) In machinery spaces where main propulsion internal combustion machinery is installed, the number of pounds of carbon dioxide required shall be equal to the gross volume of the space taken to the underside of the deck forming the hatch opening divided by 22.
(5) In miscellaneous spaces other than cargo or main machinery spaces, the number of pounds of carbon dioxide required shall be equal to the gross volume of the space divided by 22.
(6) Branch lines to the various spaces other than cargo and similar spaces, shall be as noted in table 76.1590(a)(6). This table is based on cylinders having discharge outlets and siphon tubes of 3/8-inch diameter.
Table 76.15-90(a)(6)
------------------------------------------------------------------------
Number of cylinders Nominal pipe size
------------------------------------------------------------------------
Over Not over Inches Type
------------------------------------------------------------------------
2 \1/2\ Standard.
2.............................. 4 \3/4\ Do.
4.............................. 6 1 Extra heavy.
6.............................. 12 1\1/4\ Do.
12............................. 16 1\1/2\ Do.
16............................. 27 2 Do.
27............................. 39 2\1/2\ Do.
39............................. 60 3 Do.
60............................. 80 3\1/2\ Do.
80............................. 104 4 Do.
104............................ 165 5 Do.
------------------------------------------------------------------------
(b) [Reserved]
[CGFR 6550, 30 FR 16940, Dec. 30, 1965, as amended by CGFR 6787, 32 FR 19181, Dec. 20, 1967; USCG19996216, 64 FR 53226, Oct. 1, 1999]
Subpart 76.17Foam Extinguishing Systems, Details
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§ 76.17-1 Application.
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(a) Where a foam extinguishing system is installed, the provisions of this subpart, with the exception of §76.1790, shall apply to all installations contracted for on or after November 19, 1952. Installations contracted for prior to November 19, 1952, shall meet the requirements of §76.1790.
(b) [Reserved]
§ 76.17-5 Quantity of foam required.
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(a) Area protected. (1) For machinery and similar spaces, the system shall be so designed and arranged as to spread a blanket of foam over the entire tank top or bilge of the space protected. The arrangement of piping shall be such as to give a uniform distribution over the entire area protected.
(2) Where an installation is made to protect an oil fired boiler installation on a flat which is open to or can drain to the lower engine room or other space, both the flat and the lower space shall be protected simultaneously. The flat shall be fitted with suitable coamings on all openings other than deck drains to properly restrain the oil and foam at that level. Other installations of a similar nature will be considered in a like manner.
(3) Where a system is installed to protect a tank, it shall be so designed and arranged as to spread a blanket of foam over the entire liquid surface of the tank within the range of usual trim. The arrangement of piping shall be such as to give a uniform distribution over the entire area protected.
(b) Rate of application. (1) For spaces other than tanks, the rate of discharge to foam outlets protecting the hazard shall be at least as set forth in this subparagraph.
(i) For chemical foam systems with stored A and B solutions, a total of at least 1.6 gallons per minute of the two solutions shall be discharged for each 10 square feet of area protected.
(ii) For other types of foam systems, the water rate to the dry powder generators or air foam production equipment shall be at least 1.6 gallons per minute for each 10 square feet of area protected.
(2) For tanks, the rate of discharge to foam outlets protecting the hazard shall be as set forth in paragraph (b)(1) of this section except that the value of 1 gallon per minute shall be substituted in both cases for the value of 1.6 gallons per minute.
(c) Supply of foam producing material. (1) There shall be provided a quantity of foam producing material sufficient to operate the equipment at the discharge rate specified in paragraph (b) of this section for a period of at least 3 minutes for spaces other than tanks, and for at least 5 minutes for tanks.
(2) A separate supply of foam agent need not be provided for each space protected. The total available supply shall be at least sufficient for the space requiring the greatest amount.
(3) Where pumps are required, the water supply shall be from outside the space protected and shall in no way be dependent upon power from the space protected.
§ 76.17-10 Controls.
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(a) The foam agent, its container, and all controls and valves for the operation of the system shall be of an approved type.
(b) The foam agent container and all controls and valves for the operation of the system shall be outside the space protected and shall not be located in such space as might be cut off or made inaccessible in the event of fire in any of the spaces protected. The control space shall be as convenient as practicable to one of the main escapes from spaces protected, and shall be marked as required by §78.4717 of this subchapter. Where pumps are required, it shall not be necessary that they be started from the control space.
(c) Complete, but simple instructions for the operation of the system shall be located in a conspicuous place at or near the controls.
(d) The valves to the various spaces served shall be marked as required by §78.4715 of this chapter.
§ 76.17-15 Piping.
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(a) All piping, valves, and fittings shall meet the applicable requirements of subchapter F (Marine Engineering) of this chapter.
(b) All piping, valves, and fittings of ferrous materials shall be protected inside and outside against corrosion unless specifically approved otherwise by the Commandant.
(c) All piping, valves, and fittings shall be securely supported, and where necessary, protected against injury.
(d) Drains and dirt traps shall be fitted where necessary to prevent the accumulation of dirt or moisture.
(e) Piping shall be used for no other purpose.
§ 76.17-20 Discharge outlets.
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(a) Discharge outlets shall be of an approved type.
(b) [Reserved]
§ 76.17-25 Additional protection required.
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(a) In order that any residual fires above the floor plates may be extinguished when a foam system is installed for the protection of spaces other than tanks, at least 2 fire hydrants, in addition to those required for the machinery space by subpart 76.10, shall be installed outside of the machinery space entrances. Such hydrants shall be fitted with sufficient hose so that any part of the machinery space may be reached with at least 2 streams of water, and each hose shall be equipped with an approved combination nozzle, applicator, and self-cleaning strainer as described in §76.1010(j)(3).
(b) [Reserved]
§ 76.17-90 Installations contracted for prior to November 19, 1952.
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(a) Installation contracted for prior to November 19, 1952, shall meet the following requirements:
(1) Existing arrangements, materials, and facilities previously approved shall be considered satisfactory so long as they meet the minimum requirements of this paragraph and they are maintained in good condition to the satisfaction of the Officer in Charge, Marine Inspection. Minor repairs and alterations may be made to the same standards as the original installation.
(2) The details of the systems shall be in general agreement with §§76.175 through 76.1720, with the exception of §76.175(a)(2), insofar as is reasonable and practicable. A 6-inch blanket of foam in 5 minutes for tanks and 3 minutes for other spaces will be considered as meeting the requirements of §76.175.
(b) [Reserved]
Subpart 76.23Manual Sprinkling System, Details
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§ 76.23-1 Application.
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(a) Where a manual sprinkling system is installed, the provisions of this subpart, with the exception of §76.2390, shall apply to all installations contracted for on or after November 19, 1952. Installations contracted for prior to November 19, 1952, shall meet the requirements of §76.2390.
(b) [Reserved]
§ 76.23-5 Zoning.
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(a) Separate zones may be used for each deck, and on any particular deck, spaces separated by A or B Class bulkheads may be separately zoned.
(b) On any particular deck, large common areas may be zoned in accordance with table 76.235(b). All such zones within one common area shall be of approximately the same size. Zones of this type shall overlap in such a manner that the end sprinkler heads of both adjoining zones will cover the identical area.
Table 76.23-5(b)
------------------------------------------------------------------------
Square feet of common deck area Maximum
-------------------------------------------------------------- number of
Over Not over zones
------------------------------------------------------------------------
800 1
800............................................... 1,800 2
1,800............................................. 3,000 3
3,000............................................. 5,000 4
5,000............................................. 9,000 5
9,000............................................. 16,000 6
16,000............................................ 30,000 7
30,000............................................ ......... 8
------------------------------------------------------------------------
§ 76.23-10 Quantity, pipe sizes, and discharge rates.
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(a) General. (1) The system shall be so designed and arranged that the overhead is effectively sprayed and all portions of the deck are covered. The capacity shall be such that at least 12 gallons of water per minute are applied to each 100 square feet of deck area.
(2) Piping, fittings, sprinkler heads, and pumps installed in accordance with the remainder of this section will be considered as meeting the above requirements. If alternate sizes or arrangements are used, it shall be demonstrated that these minimum requirements have been met.
(b) Sprinkler heads. (1) Three-eighth inch open type sprinkler heads shall be used. Sprinkler heads shall be so arranged that no portion of the overhead is more than 7 feet from a sprinkler head.
(2) [Reserved]
(c) Pipe sizes. (1) The various pipe sizes shall be in proportion to the number of heads served. Minimum pipe sizes shall be as given in table 76.2310(c).
Table 76.23-10(c)
------------------------------------------------------------------------
Number of 3/8 inch heads served Minimum
-------------------------------------------------------------- nominal
pipe
Over Not over sizes,
inches
------------------------------------------------------------------------
1 \3/4\
1................................................. 2 1
2................................................. 4 1\1/4\
4................................................. 6 1\1/2\
6................................................. 12 2
12................................................ 18 2\1/2\
18................................................ 30 3
30................................................ 46 3\1/2\
46................................................ 66 4
66................................................ 120 5
------------------------------------------------------------------------
(d) Fire pumps. (1) The fire pumps may be used for the sprinkling system provided there is sufficient total capacity to operate the largest zone of the sprinkling system with a Pitot tube pressure of at least 15 p.s.i. at all heads and at the same time to deliver water from the two highest fire hose outlets in a manner similar to that described in §76.105(c). In addition, on vessels over 750 gross tons, there shall be sufficient pumping capacity to also operate the second largest zone.
§ 76.23-15 Controls.
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(a) The controls for the system shall be outside the spaces protected, and shall not be located in such space as might be cut off or made inaccessible in the event of fire in any of the spaces protected. The control space shall be marked as required by §78.4718 of this subchapter. It shall not be necessary to start the pumps from the control space.
(b) Distribution piping to the various zones shall be controlled from one station. Each branch line to the various zones shall be fitted with a stop valve which shall be marked as required by §78.4715 of this subchapter.
[CGFR 6550, 30 FR 16940, Dec. 30, 1965, as amended by USCG200418884, 69 FR 58347, Sept. 30, 2004]
§ 76.23-20 Piping.
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(a) All piping, valves, and fittings shall meet the applicable requirements of subchapter F (Marine Engineering) of this chapter.
(b) All piping, valves, and fittings of ferrous materials shall be protected inside and outside against corrosion unless specifically approved by the Commandant.
(c) All piping, valves, fittings, and sprinkler heads shall be securely supported, and where necessary, protected against injury.
(d) Drains and dirt traps shall be fitted where necessary to prevent the accumulation of dirt or moisture.
(e) Piping shall be used for no other purpose.
§ 76.23-25 Sprinkler heads.
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(a) Sprinkler heads shall be of an approved type.
(b) [Reserved]
§ 76.23-90 Installations contracted for prior to November 19, 1952.
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(a) Installations contracted for prior to November 19, 1952, shall meet the following requirements:
(1) Existing arrangements, materials, and facilities previously approved shall be considered satisfactory so long as they meet the minimum requirements of this paragraph and they are maintained in good condition to the satisfaction of the Officer in Charge, Marine Inspection. Minor repairs and replacements may be made to the same standards as the original installation.
(2) The details of the system shall be in general agreement with §§76.235 through 76.2325 insofar as is reasonable and practicable. Existing piping, pumping facilities, and sprinkler heads or perforated pipes may be retained provided all portions of the overhead are effectively sprayed and all portions of the deck are covered.
(b) [Reserved]
Subpart 76.25Automatic Sprinkling System, Details
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§ 76.25-1 Application.
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Where an automatic sprinkling system is installed, the systems shall comply with NFPA 131996.
[CGD 95028, 62 FR 51204, Sept. 30, 1997]
§ 76.25-5 Zoning.
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(a) The automatic sprinkling system shall be divided into separate zones to restrict the area covered by any particular alarm signal.
(b) No sprinkling zone shall contain more than 250 sprinkler heads.
(c) The sprinkling zone may cover more than one deck, in which case, the boundaries shall be maintained in a vertical line insofar as is reasonable and practicable. The boundaries of the zone shall be coincident with bulkheads of Class A construction such as main vertical zone or watertight bulkheads.
(d) Spaces in different main vertical zones shall not be included in the same sprinkling zone.
§ 76.25-10 Size and arrangement of sprinkler heads and pipe sizes.
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(a) General. (1) The system shall be so designed and arranged that the overhead is effectively sprayed and that all portions of the deck are covered.
(2) One-half inch sprinkler heads shall be used. Sprinkler heads shall be so arranged that no portion of the overhead or vertical projection of the deck is more than 7 feet from a sprinkler head.
(b) Pipe sizes. (1) The sizes of branch lines, single cross mains, feed mains, and risers shall be in proportion to the number of sprinkler heads served. The minimum pipe sizes shall be as given in table 76.2510(b)(1).
Table 76.25-10(b)(1)
------------------------------------------------------------------------
Maximum number of heads
served
---------------------------
Vessels
whose Vessels
construction constructed
is more in general
Minimum nominal pipe size, inches combustible agreement
than that with
set forth in §§
§§ 72.05-5
72.05-5 through
through 72.05-60
72.05-60
------------------------------------------------------------------------
1........................................... 2 2
1\1/4\...................................... 3 3
1\1/2\...................................... 5 5
2........................................... 10 10
2\1/2\...................................... 20 40
3........................................... 40 250
3\1/2\...................................... 65 ............
4........................................... 100 ............
5........................................... 160 ............
6........................................... 250 ............
------------------------------------------------------------------------
(2) If a complete loop cross main is employed, the size of such cross main shall be in proportion to the number of sprinkler heads served. The minimum pipe sizes shall be as given in table 76.2510(b)(2). The entire loop shall be of the same size pipe.
Table 76.25-10(b)(2)
------------------------------------------------------------------------
Maximum number of heads
served
---------------------------
Vessels
whose Vessels
construction constructed
is more in general
Minimum nominal pipe size, inches combustible agreement
than that with
set forth in §§
§§ 72.05-5
72.05-5 through
through 72.05-60
72.05-60
------------------------------------------------------------------------
1........................................... 5 5
1\1/4\...................................... 9 9
1\1/2\...................................... 13 13
2........................................... 22 30
2\1/2\...................................... 40 80
3........................................... 80 250
3\1/2\...................................... 130 ............
4........................................... 250 ............
------------------------------------------------------------------------
§ 76.25-15 Pumps and water supply.
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(a) An automatically controlled pump shall be provided to supply the sprinkling system and shall be used for no other purpose. The size and capacity of the pump shall be governed by the zone having the greatest capacity need for any one deck, and shall be suitable to operate at least the number of heads noted in table 76.2515(a) with a Pitot tube pressure of at least 15 p.s.i. at all heads (approximately 20 GPM per head). There shall also be sufficient pumping capacity available, either from the automatic pump, the fire pumps, or other source, so that in conjunction with the automatic pump the total number of heads noted in table 76.2515(a) may be operated with the same efficiency as noted above, and at the same time to deliver water from the two highest fire hose outlets in a manner similar to that described in §76.105(c). Intermediate values may be obtained by interpolation.
Table 76.25-15(a)
------------------------------------------------------------------------
Number of Number of
heads heads
Maximum number of heads on one deck in one automatic additional
zone pump to pumps to
supply supply
------------------------------------------------------------------------
5............................................. 5 ...........
10............................................ 10 ...........
20............................................ 10 10
30............................................ 12 16
40............................................ 15 18
50............................................ 15 25
60............................................ 20 25
80............................................ 20 30
100........................................... 20 40
120........................................... 20 50
150........................................... 20 60
200........................................... 20 75
250........................................... 20 100
------------------------------------------------------------------------
(b) [Reserved]
§ 76.25-20 Pressure tank.
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(a) A pressure tank or other suitable means shall be installed to permit early action of the system pending the starting of the pump. Sufficient fresh water shall be carried in the tank to fill the piping of the largest zone, and in addition, force out at least 200 gallons at the least effective head in the zone at a Pitot tube pressure of at least 15 p.s.i. Suitable check valves shall be installed to prevent salt water from entering the pressure tank, and low water and low pressure alarms shall be fitted.
(b) [Reserved]
§ 76.25-25 Controls.
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(a) The controls for the system shall be outside the spaces protected, and shall not be located in such space as might be cut off or made inaccessible in the event of fire in any of the spaces protected. The control space shall be marked as required by §78.4717 of this subchapter.
(b) Each supply line to the various zones shall be fitted with a stop valve which shall be marked as required by §78.4715 of this subchapter. These valves shall be normally open, and shall indicate by an alarm if they are closed.
§ 76.25-30 Piping.
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(a) All piping, valves, and fittings of ferrous materials shall be protected inside and outside against corrosion unless specifically approved by the Commandant.
(b) All piping, valves, fittings, and sprinkler heads shall be securely supported, and, where necessary, protected against injury.
(c) Drains and dirt traps shall be fitted where necessary to prevent the accumulation of dirt or moisture.
(d) Piping shall be used for no other purpose.
§ 76.25-35 Operation and installation.
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(a) The system shall be so arranged and installed that a fire in any of the protected spaces will open the affected sprinkler heads. Water from the pressure tank shall be immediately available to the affected sprinkler head and before the supply from the pressure tank is exhausted, the sprinkler pump shall be automatically started and shall supply the system until manually shut off. Suitable test stations shall be installed in each zone to test the operation of the system.
(b) The system shall be so arranged and installed that the presence of a fire in any of the protected spaces will automatically be registered visibly and audibly in the pilothouse or fire control station. The visible notice shall automatically indicate the zone in which the alarm originated. On vessels over 150 feet in length, there shall also be an audible alarm in the engine room.
(c) There shall be not less than two sources of power supply for the sea water pumps, air compressors and automatic alarms. Where the sources of power are electrical, these shall be a main generator and an emergency source of power. One supply shall be taken from the main switchboard, by separate feeders reserved solely for that purpose. Such feeders shall be run to a change-over switch situated near to the sprinkler unit and the switch shall normally be kept closed to the feeder from the emergency switchboard. The change-over switch shall be clearly labeled and no other switch shall be permitted in these feeders.
(d) Where subject to freezing, sprinkler systems shall be of the dry pipe type.
(e) The sprinkler heads, the cabinet, alarms, dry valves and actuating mechanisms shall be of an approved type.
(f) In general, the sprinkler heads shall be rated not lower than 135 degrees F. nor higher than 165 degrees F. However, in spaces where a high ambient temperature may be expected, sprinkler heads rated at 212 degrees F. shall be used.
(g) The automatic sprinkling system and all its components shall be used for no other purpose.
(h) All wiring and electrical circuits and equipment shall meet the applicable requirements of subchapter J (Electrical Engineering) of this chapter.
(i) All piping, valves, fittings, pressure tanks, etc., must meet the applicable requirements of subchapter F (Marine Engineering) of this chapter.
(j) A framed chart or diagram shall be installed in the wheelhouse or control station adjacent to the detecting cabinet indicating the location of the various detecting zones and giving instructions for the operation, maintenance, and testing of the system. This chart, or a separate card or booklet to be kept near the chart, shall have tabulated spaces for the date and signature of the licensed officer of the vessel who shall witness or conduct the periodic tests.
(k) The audible alarms shall be identified as required by §78.4713 of this subchapter.
[CGFR 6550, 30 FR 16940, Dec. 30, 1965, as amended by CGD 74125A, 47 FR 15231, Apr. 8, 1982]
§ 76.25-90 Installations contracted for prior to September 30, 1997.
top
(a) Existing arrangements, materials, and facilities previously approved shall be considered satisfactory so long as they meet the minimum requirements of this paragraph, and they are maintained in good condition to the satisfaction of the Officer in Charge, Marine Inspection. Minor repairs and replacements may be made to the same standards as the original installation.
(b) The details of the system shall be in general agreement with NFPA 131996 insofar as is reasonable and practicable. Existing piping, pumping facilities, sprinkler heads, and operating devices may be retained provided a reasonable coverage of the spaces protected is assured.
[CGD 95028, 62 FR 51204, Sept. 30, 1997]
Subpart 76.27Electric Fire Detecting System, Details
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§ 76.27-1 Application.
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(a) Where an electric fire detecting system is installed, the provisions of this subpart, with the exception of §76.2790, shall apply to all installations contracted for on or after November 19, 1952. Installations contracted for prior to November 19, 1952, shall meet the requirements of §76.2790.
(b) [Reserved]
§ 76.27-5 Zoning.
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(a) The fire detecting system shall be divided into separate zones to restrict the area covered by any particular alarm signal.
(b) All spaces in a fire detecting zone shall be accessible from one to another without leaving the deck involved. All doors in watertight subdivision bulkheads and main vertical zone bulkheads shall be assumed closed for the purpose of this requirement.
(c) The fire detecting zone shall not include spaces on more than one deck, except:
(1) Adjacent and communicating spaces on different decks in the ends of the vessel having a combined ceiling area of not more than 3,000 square feet.
(2) Isolated rooms or lockers in such spaces as mast houses, wheelhouse top, etc., which are easily communicable with the area of the fire-detecting circuit to which they are connected.
(3) Systems with indicators for individual spaces.
(d) The fire detecting zone shall not contain more than 50 protected rooms or spaces.
§ 76.27-10 Location and spacing of detectors.
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(a) The detectors shall be located close to the overhead in the space protected. Where liable to physical damage, the detector shall be suitably protected.
(b) Unless specifically approved otherwise, no spot on the overhead of a protected space shall be more than 10 feet from a detector. Where beams or girders extend below the ceiling, or where the ceiling is installed at more than one level, the detectors shall be so located as to be most effective.
§ 76.27-15 Operation and installation.
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(a) The system shall be so arranged and installed that the presence of a fire in any of the protected spaces will be automatically registered visibly and audibly in the pilothouse or fire control station. The visible notice shall indicate the zone in which the alarm originated. On vessels over 150 feet in length, there shall also be an audible alarm in the engine room.
(b) The detectors, the detecting cabinet and alarms shall be of an approved type.
(c) In general, the detectors, shall be rated not lower than 135 degrees F. and not higher than 165 degrees F. However, in spaces where a high ambient temperature may be expected, detectors shall be rated not lower than 175 degrees F. and not higher than 225 degrees F.
(d) The fire detecting system shall be used for no other purpose, except that it may be incorporated with the manual alarm system.
(e) All wiring and electrical circuits and equipment shall meet the applicable requirements of subchapter J (Electrical Engineering) of this chapter.
(f) A framed chart or diagram shall be installed in the wheelhouse or control station adjacent to the detecting cabinet indicating the location of the various detecting zones and giving instructions for the operation, maintenance, and testing of the system. This chart, or a separate card or booklet to be kept near the chart, shall have tabulated spaces for the date and signature of the licensed officer of the vessel who shall witness or conduct the periodic tests.
(g) The audible alarms shall be identified as required by §78.4713 of this subchapter.
§ 76.27-90 Installations contracted for prior to November 19, 1952.
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(a) Installations contracted for prior to November 19, 1952, shall meet the following requirements:
(1) Existing arrangements, materials, and equipment previously approved shall be considered satisfactory so long as they meet the minimum requirements of this paragraph, and they are maintained in good condition to the satisfaction of the Officer in Charge, Marine Inspection. Minor repairs and alterations may be made to the same standards as the original installation.
(2) The details of the systems shall be in general agreement with §§76.275 through 76.2715 insofar as is reasonable and practicable.
(b) [Reserved]
Subpart 76.30Pneumatic Fire Detecting System, Details
top
§ 76.30-1 Application.
top
(a) Where a pneumatic fire detecting system is installed, the provisions of this subpart, with the exception of §76.3090, shall apply to all installations contracted for on or after November 19, 1952. Installations contracted for prior to November 19, 1952, shall meet the requirements of §76.3090.
(b) [Reserved]
§ 76.30-5 Zoning.
top
(a) The fire detecting system shall be divided into separate zones to restrict the area covered by any particular alarm signal.
(b) All spaces in a fire detecting zone shall be accessible from one to another without leaving the deck involved. All doors in watertight subdivision bulkheads and main vertical zone bulkheads shall be assumed closed for the purpose of this requirement.
(c) The fire detecting zone shall not include spaces on more than one deck, except:
(1) Adjacent and communicating spaces on different decks in the ends of the vessel, having a combined deck area of not more than 3,000 feet.
(2) Isolated rooms or lockers in such spaces as mast houses, wheelhouse top, etc., which are easily communicable with the area of the fire-detecting circuit to which they are connected.
(d) The fire detecting zone shall not include more than 50 protected rooms or spaces.
(e) Individual tubing circuits shall not contain more than 1,000 feet of pneumatic tubing or its equivalent. However, more than one tubing circuit may be included in the same fire detecting zone.
§ 76.30-10 Location and spacing of tubing.
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(a) The tubing shall be located on the overhead or within 12 inches of the overhead on the bulkheads. Where liable to physical damage, the tubing shall be suitably protected.
(b) In each enclosed space or separate room there shall be exposed at least 5 percent of the total length of tubing in that circuit, but in no case shall the amount be less than 25 feet.
(c) No spot on the overhead of a protected space shall be more than 12 feet from the nearest point of tubing. Where beams or girders extend below the ceiling, or where the ceiling is installed at more than one level, the tubing shall be so located as to be most effective.
§ 76.30-15 Operation and installation.
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(a) The system shall be so arranged and installed that the presence of a fire in any of the protected spaces will automatically be registered visibly and audibly in the pilothouse or fire control station. The visible notice shall automatically indicate the zone in which the alarm originated. On vessels over 150 feet in length, there shall also be an audible alarm in the engine room.
(b) The tubing or detecting devices, pneumatic-electric converting units, detecting cabinets, and alarms shall be of an approved type.
(c) In general, the system shall be adjusted to operate at a temperature rise of approximately 40 degrees F. per minute at the center of the circuit.
(d) The fire detecting system shall be used for no other purpose except that it may be incorporated with the manual alarm system.
(e) All wiring and electrical circuits and equipment shall meet the applicable requirements of subchapter J (Electrical Engineering) of this chapter.
(f) A framed chart or diagram shall be installed in the wheelhouse or control station adjacent to the detecting cabinet indicating the location of the various detecting zones and giving instructions for the operation, maintenance, and testing of the system. This chart, or a separate card or booklet to be kept near the chart, shall have tabulated spaces for the date and signature of the licensed officer of the vessel who shall witness or conduct the periodic tests.
(g) The audible alarms shall be identified as required by §78.4713 of this subchapter.
§ 76.30-90 Installations contracted for prior to November 19, 1952.
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(a) Installations contracted for prior to November 19, 1952, shall meet the following requirements:
(1) Existing arrangements, materials, and equipment previously approved shall be considered satisfactory so long as they meet the minimum requirements of this paragraph and they are maintained in good condition to the satisfaction of the Officer in Charge, Marine Inspection. Minor repairs and alterations may be made to the same standards as the original installation.
(2) The details of the systems shall be in general agreement with §§76.305 through 76.3015 insofar as is reasonable and practicable.
(b) [Reserved]
Subpart 76.33Smoke Detecting System, Details
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§ 76.33-1 Application.
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(a) Where a smoke detecting system is installed, the provisions of this subpart, with the exception of §76.3390, shall apply to all installations contracted for on or after November 19, 1952. Installations contracted for prior to November 19, 1952, shall meet the requirements of §76.3390.
(b) [Reserved]
§ 76.33-5 Zoning.
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(a) The smoke detecting system shall be divided into separate zones to restrict the area covered by any particular alarm signal.
(b) The smoke detecting zone shall not include spaces on more than one deck, except the small adjacent spaces mentioned in paragraph (c) of this section.
(c) Each separate space shall be considered as a zone, except that two or three small adjacent spaces having a combined volume not exceeding 5,000 cubic feet may be connected on the same zone.
(d) Where a space is of such size that one accumulator is not sufficient, not more than two accumulators may be combined in one zone.
§ 76.33-10 Location and spacing of accumulators.
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(a) Smoke accumulators shall be located overhead in each compartment. Where liable to physical damage, the accumulators and piping shall be suitably protected.
(b) No spot on the overhead of a protected space shall be more than 40 feet from an accumulator.
(c) Accumulators shall not be located closer to the opening of a ventilator than three times the diameter or equivalent diameter of the opening.
§ 76.33-15 Piping.
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(a) Individual pipes shall be not less than 3/4-inch standard pipe size.
(b) All piping, valves, and fittings of ferrous materials shall be protected inside and outside against corrosion unless specifically approved otherwise by the Commandant.
(c) Where a smoke detecting system serves a space used alternately for liquid and dry cargo, a valve shall be installed between the tank and the detecting cabinet so that the line may be shut off when liquids are carried. When the smoke detecting system is combined with a fire extinguishing system, the operation of the valve shall not affect the operation of the fire extinguishing system.
(d) All piping, valves, and fittings shall be securely supported, and where necessary, protected against injury. The piping shall be installed with as easy bends as practicable, and shall be installed to grade to low points for drainage.
(e) Drains and dirt tapes shall be fitted where necessary to prevent the accumulation of dirt or moisutre.
§ 76.33-20 Operation and installation.
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(a) The system shall be so arranged and installed that the presence of smoke in any of the protected spaces will automatically be indicated visually to an observer directly in front of the detecting cabinet. The visible notice shall automatically indicate the zone in which the smoke originated. The detecting cabinet shall normally be located in the pilothouse or fire control station. On vessels over 5,000 gross tons, there shall also be an automatic audible alarm in the wheelhouse together with an auxiliary audible alarm in the engine room.
(b) If the detecting cabinet is not located in the pilothouse or fire control station, it shall be located in convenient proximity to the valve control station of the extinguishing system. In this case, there shall be in the pilothouse or fire control station automatic visual alarms, one for each zone in which an alarm may originate, as well as an automatic audible alarm. There shall also be an auxiliary audible alarm in the engine room. For installations contracted for on or after January 1, 1962, where detecting cabinets are not located in the pilothouse or an adjacent fire control station having direct access to the pilothouse, an efficient means of direct communication shall be provided between the pilothouse and the stations where the detecting cabinets are located.
(c) A sufficient quantity of exhaust from the detecting cabinet shall be discharged in the vicinity of the cabinet to permit the detection of fire by odor. A valve shall be installed in such space to direct the exhaust, if obnoxious, to the outside.
(d) The smoke detecting system shall be used for no other purpose except that it may be incorporated with the fire extinguishing system to the spaces covered by the smoke detecting system.
(e) The accumulators, detecting cabinet, interconnecting valves with the fire extinguishing system, alarms, and indicating devices shall be of an approved type.
(f) All wiring and electrical circuits and equipment shall meet the applicable requirements of subchapter J (Electrical Engineering) of this chapter.
(g) A framed chart or diagram shall be installed adjacent to the detecting cabinet and auxiliary panel indicating the location of the various zones and giving instructions for the operation, maintenance, and testing of the system. The chart at the cabinet location or a separate card or booklet to be kept near the chart, shall have tabulated spaces for the date and signature of the licensed officer of the vessel who shall witness or conduct the periodic tests.
(h) The audible smoke detecting alarms shall be identified as required by §78.4713 of this subchapter.
§ 76.33-90 Installations contracted for prior to November 19, 1952.
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(a) Installations contracted for prior to November 19, 1952, shall meet the following requirements:
(1) Existing arrangements, material, and equipment previously approved shall be considered satisfactory so long as they meet the minimum requirements of this paragraph and they are maintained in good condition to the satisfaction of the Officer in Charge, Marine Inspection. Minor repairs and alterations may be made to the same standards as the original installation.
(2) The details of the systems shall be in general agreement with §§76.335 through 76.3315 insofar as is reasonable and practicable.
(b) [Reserved]
Subpart 76.35Manual Alarm System, Details
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§ 76.35-1 Application.
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(a) Where a manual alarm system is installed, the provisions of this subpart, with the exception of §76.3590, shall apply to all installations contracted for on or after November 19, 1952. Installations contracted for prior to November 19, 1952, shall meet the requirements of §76.3590.
(b) [Reserved]
§ 76.35-5 Zoning.
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(a) The zoning of the manual alarm system shall meet the same requirements as for the electric fire detecting system, §76.275.
(b) [Reserved]
§ 76.35-10 Location and spacing of manual alarm boxes.
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(a) There shall be at least one manual alarm box in each zone.
(b) Manual alarms shall be located in main passageways, stairway enclosures, public spaces, or similar locations where they will be readily available and easily seen in case of need.
(c) In general, a sufficient number of manual alarm boxes shall be employed that a person escaping from any space would find a manual alarm box convenient on his normal route of escape.
§ 76.35-15 Operation and installation.
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(a) The system shall be so arranged and installed that the presence of a fire may be reported from any of the protected spaces and be automatically registered visibly and audibly in the pilothouse or fire control station. The visible notice shall indicate the zone in which the alarm originated. There shall also be an audible alarm in the engine room. (continued)