- § 76.33-1 - Application.
- § 76.33-5 - Zoning.
- § 76.33-10 - Location and spacing of accumulators.
- § 76.33-15 - Piping.
- § 76.33-20 - Operation and installation.
- § 76.33-90 - Installations contracted for prior to November 19, 1952.
§ 76.33-1 - Application.
(a) Where a smoke detection system is installed, the provisions of this subpart, with the exception of § 76.33-90, apply to all installations contracted for on or after November 19, 1952, and prior to July 22, 2021. Installations contracted for prior to November 19, 1952, must meet the requirements of § 76.33-90 of this subpart.
(b) Vessels must comply with the requirements of § 76.33-20(c) of this subpart not later than July 22, 2021.
§ 76.33-5 - Zoning.
(a) The smoke detection system must be divided into separate zones to restrict the area covered by any particular alarm signal.
(b) The smoke detection zone must not include spaces on more than one deck, except the small adjacent spaces mentioned in paragraph (c) of this section.
(c) Each separate space must 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.
(a) Smoke accumulators must be located overhead in each compartment. Where liable to physical damage, the accumulators and piping must be suitably protected.
(b) No spot on the overhead of a protected space may be more than 40 feet from an accumulator.
(c) Accumulators must 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.
(a) Individual pipes must be not less than
(b) All piping, valves, and fittings of ferrous materials must be protected inside and outside against corrosion unless specifically approved otherwise by the Commandant.
(c) Where a smoke detection system serves a space used alternately for liquid and dry cargo, a valve must be installed between the tank and the detection cabinet so that the line may be shut off when liquids are carried. When the smoke detection system is combined with a fire extinguishing system, the operation of the valve must not affect the operation of the fire extinguishing system.
(d) All piping, valves, and fittings must be securely supported, and where necessary, protected against injury. The piping must be installed with as easy bends as practicable, and must be installed to grade to low points for drainage.
(e) Drains and dirt traps must be fitted where necessary to prevent the accumulation of dirt or moisture.
§ 76.33-20 - Operation and installation.
(a) The system must 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 detection cabinet. The visible notice must automatically indicate the zone in which the smoke originated. The detection cabinet must normally be located in the pilothouse or fire control station. On vessels greater than 5,000 gross tons, there must also be an automatic audible alarm in the wheelhouse together with an auxiliary audible alarm in the engine room.
(b) If the detection cabinet is not located in the pilothouse or fire control station, it must be located in convenient proximity to the valve control station of the extinguishing system. In this case, there must 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 must also be an auxiliary audible alarm in the engine room. For installations contracted for on or after January 1, 1962, where detection 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 must be provided between the pilothouse and the stations where the detection cabinets are located.
(c) No exhaust from the detection cabinet may be discharged in the vicinity of the cabinet to permit the detection of fire by odor. Instead, the exhaust must be directed to the outside. Vessels must comply with this requirement not later than July 22, 2021.
(d) The smoke detection system must be used for no other purpose except that it may be incorporated with the fire extinguishing system to the spaces covered by the smoke detection system.
(e) The accumulators, detection cabinet, interconnecting valves with the fire extinguishing system, alarms, and indicating devices must be of an approved type.
(f) All wiring and electrical circuits and equipment must meet the applicable requirements of subchapter J (Electrical Engineering) of this chapter.
(g) A framed chart or diagram must be installed adjacent to the detection 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, must have tabulated spaces for the date and signature of the licensed officer of the vessel who must witness or conduct the periodic tests.
(h) The audible smoke detection alarms must be identified as required by § 78.47-13 of this subchapter.
§ 76.33-90 - Installations contracted for prior to November 19, 1952.
(a) Installations contracted for prior to November 19, 1952, must meet the following requirements:
(1) Existing arrangements, material, and equipment previously approved will 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 must be in general agreement with §§ 76.27-5 through 76.27-35 insofar as is reasonable and practicable.