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e-CFR data is current as of September 17, 2020

Title 46Chapter ISubchapter HPart 76Subpart 76.23 → §76.23-10


Title 46: Shipping
PART 76—FIRE PROTECTION EQUIPMENT
Subpart 76.23—Manual Sprinkling System, Details


§76.23-10   Quantity, pipe sizes, and discharge rates.

(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 76.23-10(c).

Table 76.23-10(c)

Number of 38 inch heads servedMinimum nominal pipe sizes, inches
OverNot over
1 34
121   
24114
46112
6122   
1218212
18303   
3046312
46664   
661205   

(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 §76.10-5(c). In addition, on vessels over 750 gross tons, there shall be sufficient pumping capacity to also operate the second largest zone.

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