Section 3 SUPPRESSION OF FIRE

301. Containment of fire

1. Exterior boundaries of superstructures and deckhouses enclosing accommodation and including any overhanging decks which support such accommodation, are to be constructed of steel and insulated to "H-60" class for the whole of the portions which face the cargo area and the process area and on the outward sides for a distance of 3 m from the end boundary facing the cargo area and proc- ess area. In cases where there is a minimum of 33 separation from the cargo area and process

area, however, the results of risk assessment or fire load evaluation are satisfactory, may be used instead of the "H-0".

2. Fire integrity of bulkheads and decks

"A-0" class

(1) The minimum fire integrity of bulkheads and decks shall be as prescribed in Tables 8.1 and

8.2.

(2) Fjaocrendt etsepramceinsi,ngsucth spapacperospariraeteclfaisresifiendtegarcitcyordstianngdatrodsthteoir bfeireaprpislikedastoshdoiwvinsioins cbaetetwgoereines a①d- to ⑫ below. The title of each category is intended to be typical rather than restrictive.

① Control stations

spaces as defined in Ch 1, 211. of Guidance for Mobile Offshore Drilling Unit (A sta-

tion where the emergency power source is located is not considered.)

② Corridors

corridors and lobbies.

③ Accommodation spaces

Spaces used for public spaces, cabins, offices, hospitals, cinemas, games and hobby rooms and similar spaces, excluding corridors, lavatories and pantries containing no cooking

appliances.

④ Stairways

Interior stairways, lifts and escalators (other than those wholly contained within the machi-

nery spaces) and enclosures thereto. In this connection a stairway which is enclosed only at one level is to be regarded as part of the space from which it is not separated by a fire door.

⑤ Service spaces (low risk)

Lockers, store-rooms and working spaces in which flammable materials are not stored, dry- ing rooms and laundries.

⑥ Machinery spaces of category A

Spaces as defined in Pt 8, Ch 1, 103. 31 of Rules for the Classification of Steel Ships.

⑦ Other machinery spaces

All other machinery spaces than machinery spaces of Category A, containing propelling ma- chinery, boilers, oil fuel units, steam and internal combustion engines, generators and major

electrical machinery, oil filling stations, refrigerating, stabilizing, ventilating and air-condition-

ing machinery and similar spaces, including

⑧ Process areas, Cargo areas

trunks to such spaces.

Areas as defined in Ch 1 202. 1 and

Classification of Steel Ships.

⑨ Hazardous areas

Areas as defined in Ch 7, 102.

⑩ Service spaces (high risk)

Lockers, store-rooms and working spaces

2 and Pt 7, Ch 5, 106. 3 of Rules for the

in which flammable materials are stored, galleys,

pantries containing cooking appliances, paint rooms and workshops other than those forming part of the machinery space.

⑪ Open decks

Open deck spaces and enclosed promenades having little or no fire risk.

Air spaces (the space outside superstructures and deckhouses).

⑫ Sanitary and Similar Spaces

Communal sanitary facilities such as showers, bath, containing no cooking appliances.

lavatories, etc., and isolated pantries

Table 8.1 Fire integrity of bulkheads separating adjacent spaces

Table 8.2 Fire integrity of decks separating adjacent space

Note: To be applied to Tables 8.1 and 8.2 as appropriate.

(a) Where the space contains an emergency power source or components of an emergency pow- er source adjoining a space containing a unit's service generator or the components of a unit's service generator, the boundary bulkhead or deck between those spaces is to be an "A- 60" class division.

(b) Either of the divisions indicated above or below is to be provided in consideration of Ch 10, 201. 9 (3) and (5) of Guidance for the Mobile Offshore Drilling Units.

(c)

Where spaces are of the same numerical category and superscript (c) appears, a bulkhead or deck of rating shown in the table is only required when the adjacent spaces are for a dif-

ferent purpose, e.g. in category ⑩. A galley next to a galley does not require a bulkhead

but a galley next to a paint room requires an "A-0" bulkhead.

(d) Bulkheads separating the navigating bridge, chartroom and radio room from each other may be an "B-0" rating.

(e)

*

- X

If the results of a Risk Analysis or Fire Load Analysis (reviewed and accepted by the Society) justify such, an "A-60" fire division may be used in lieu of an "H-60" bulkhead. An "A-0" wall used in conjunction with a water curtain system designed to provide a den- sity of at least 6.1 ThĤm Ë ­min of exposed surface area may be used as an equivalent means

of meeting the "A-60" class division.

Where an asterisk appears in the tables, the division is required to be of steel or other equivalent material but is not required to be of "A" class standard. However, where a deck, except an open deck, is penetrated for the passage of electric cables, pipes and vent ducts, such penetrations should be made tight to prevent the passage of flame and smoke.

Where "-" appears in the table, the division need not be of "A", "B" nor "C" class divisions.

Where an "X" appears in the table, the configuration is not allowed.

302. Fire fighting system

1. Fire water main equipment, water spray system and dry chemical powder fire-extinguishing systems are to comply with applicable requirements of Pt 7, Ch 5, Sec 11. of Rules for the Classification of Steel Ships except as otherwise provided in Par 2 and Par 3.

2. Water spray system

(1) A water spray system is to cover the following equipment in addition to areas specified in Pt 7, Ch 5, 1103. 1 (1) to (4) of Rules for the Classification of Steel Ships.

(A) Process equipment

(B) Connection for risers and turret areas

(2) In application to Pt 7, Ch 5, 1103. 5 of Rules for the Classification of Steel Ships, re- mote starting of pumps supplying the water spray system and remote operation of any normally closed valves in the system are to be arranged in suitable locations outside the cargo area and process area, adjacent to the accommodation spaces and readily accessible and operable in the event of fire in the areas protected.

3. Dry chemical powder fire-extinguishing systems

(1) In application to Pt 7, Ch 5, 1104. 1 of Rules for the Classification of Steel Ships, a dry chemical powder fire-extinguishing system is to cover process areas.

(2) The capacity of the system is be determined by the fire and explosion the capacity is not be not less than required amount specified in Pt 7, Ch of Rules for the Classification of Steel Ships.

analysis. However,

5, 1104. 5 and 6

4. Fire fighting systems of helicopter facilities are to comply with

Classification of the Mobile Offshore Drilling Units.

Ch 10, Sec 4 of

Rules for the

5. Quantities and locations of portable fire extinguishers are to Guidance for the Classification Floating Production Units.

comply with Ch 8, 302. 8 of

303. Fire detection and alarm systems

1. An automatic fire detection system is to be installed in machinery spaces,

service spaces, accom-

modation spaces, process areas and in any space containing equipment in which hydrocarbons or

any other flammable substance is stored, conveyed, processed or consumed.

2. When a fire is detected in the process area, the process is to be automatically stopped and the venting system is to be shut off.

3. Automatic shutdown of ventilation is to take place upon:

(1) detection of fire in enclosed spaces, unless this is in conflict with overall smoke control strategy.

(2) smoke detection in ventilation air inlets.

4. Detected fire in wellhead, turret, process plant, storage tank area or offloading area is to initiate automatic shutdown of wellhead valves and process facilities.

304.

Gas detecting and alarm devices

1. Automatic shutdown of all hydrocarbon flow is to take place when gas is detected.

2. Automatic shutdown of ventilation is to take place upon confirmed detected gas in the air inlets to nonhazardous areas. Shutdown of ventilation is to ensure that the detected gas is isolated from igni- tion sources in the ventilated space.

3. Upon detection of hydrocarbon gas in the area of wellhead, turret, production facilities and storage tanks, the wellhead valves and production facilities are to be automatically shut down.

305. Fireman’s Outfits

1. Fire-fighter's outfits are to comply with the Fire Safety Systems Code.

2. Fire-fighter's outfits are to comply with Pt 7, Ch 5, 1106. of Rules for the Classification of Steel Ships.

3. The fireman’s outfits or sets of personal equipment are to be stored as to be easily accessible and ready for use, and where more than one fireman’s outfit or more than one set of personal equip- ment is carried, they are to be stored in widely separated positions.

4. One of the outfits is to be readily accessible from the helicopter deck.