Iranian Classification Society Rules
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Section 2 Fire Protection and Means of Escape
201. Fire protection
1. Hulls, superstructures, structural bulkheads, decks and deckhouses are to be constructed of steel or other material equivalent thereto.
2. In addition to complying with the specific provisions for fire integrity of bulkheads and decks, the minimum fire integrity of all bulkheads and decks shall be as prescribed in Table 10.1 and 10.2
according to the spaces adjoining to the relevant bulkheads or decks.
3. Exterior boundaries of superstructures and deckhouses enclosing accommodation should be con- structed to "A-60" standard for the whole of the portion which faces and is within 30 m of the centre of the rotary table. For units that have a movable substructure the 30 m should be measured with the substructure at its closest drilling position to the accommodation.
4. Windows and sidescuttles, with the exception of navigating bridge windows, are to be of the non- opening type. Navigating bridge windows may be of the opening type provided the design of such windows would permit rapid closure. The Society may permit windows and sidescuttles out- side hazardous areas to be of the opening type.
5. Continuous "B" class ceilings or linings in association with the relevant decks or bulkheads may be accepted as contributing wholly or in part to the required insulation and integrity of a division.
6. In approving structural fire protection details, the Society is to have regard to the risk of heat transmission at intersections and terminal points of required thermal barriers. The insulation of a deck or bulkhead is to be carried past the penetration, intersection or terminal point for a distance of at least 450 mm in the case of steel and aluminium structures. If a space is divided with a deck or a bulkhead of "A" class standard having insulation of different values, the insulation with the higher value shall continue on the deck or bulkhead with the insulation of the lesser value for a distance of at least 450 mm .
7. The fire resistance of doors should, as far as practicable, be equivalent to that of the division in which they are fitted. External doors in superstructures and deckhouses should be constructed to at least "A-0" class standard and be self-closing, where practicable.
8. Self-closing doors in fire rated bulkheads should not be fitted with hold-back hooks. However, hold- back arrangements incorporating remote release fittings of the fail-safe type may be utilized
9. Protection of accommodation spaces, service spaces and control stations specified in Ch 1, 211. ex- cluding the space where the emergency source of electrical power is installed) is to be in accord- ance with the requirements in the followings.
(1) In general, accommodation spaces, service spaces and control stations should not be located ad- jacent to hazardous areas. However, where this is not practicable, an engineering evaluation should be performed to ensure that the level of fire protection and blast resistance of the bulk- heads and decks separating these spaces from the hazardous areas are adequate for the likely hazard.
(2) All bulkheads that are to be "A" class divisions are deckhouse side or other boundaries.
(3) All bulkheads required to be "B" class divisions are deckhouse side or other boundaries, unless continuous
to extend from deck to deck and to the
to extend from deck to deck and to the "B" class ceilings or linings are fitted on
both sides of the bulkhead, in which case the bulkhead may terminate at the continuous ceiling
or lining. In corridor bulkheads, ventilation openings may be permitted only in and under the doors of cabins, public spaces, offices and sanitary spaces. The openings are to be provided on- ly in the lower half of the door. Where such an opening is in or under a door, the total net area of any such opening or openings is not to exceed 0.05 m . When such an opening is
cut in a door it is to be fitted with a grille made of non-combustible material. Such openings
are not to be provided in a door in a division forming a stairway enclosure.
(4) Stairs are to be constructed of steel or equivalent material.
(5) Stairways which penetrate only a single deck are to be protected at least at one level by "A" or "B" class divisions and self-closing doors so as to limit the rapid spread of fire from one deck to another. Personnel lift trunks are to be protected by "A" class divisions. Stairways and lift trunks which penetrate more than a single deck are to be surrounded by "A" class divisions and protected by self-closing doors at all levels.
(6) Air spaces enclosed draught stops spaced
behind ceilings, panellings or linings are to be divided by close fitting not more than 14 m apart.
Table 9.1 Fire Integrity of Bulkheads Separating Adjacent Spaces
Spaces | (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | |
Control stations | (1) | A-0(d) | A-0 | A-60 | A-0 | A-15 | A-60 | A-15 | A-60 | A-60 | * | A-0 |
Corridors | (2) | C | B-0 | B-0 A-0(b) | B-0 | A-60 | A-0 | A-0 | A-0 | * | B-0 | |
Accommodation spaces | (3) | C | B-0 A-0(b) | B-0 | A-60 | A-0 | A-0 | A-0 | * | C | ||
Stairways | (4) | B-0 A-0(b) | B-0 A-0(b) | A-60 | A-0 | A-0 | A-0 | * | B-0 A-0(b) | |||
Service spaces(low risk) | (5) | C | A-60 | A-0 | A-0 | A-0 | * | B-0 | ||||
Machinery spaces of Categor | y A (6) | *(a) | A-0(a) | A-60 | A-60 | * | A-0 | |||||
Other machinery spaces | (7) | A-0(a)(C) | A-0 | A-0 | * | A-0 | ||||||
Hazardous areas | (8) | - | A-0 | * | A-0 | |||||||
Service spaces(high risk) | (9) | A-0(c) | - | A-0 | ||||||||
Open deck | (10) | * | * | |||||||||
Sanitary and similar spaces | (11) | - | C | |||||||||
Notes : 1. The following requirements are to govern application of the table : (1) Control stations are spaces as defined in Ch 1, 211. (A station where the emergency power source is located is not considered.) (2) Corridors mean corridors and lobbies. (3) Accommodation spaces are those 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 are 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) are lockers, store-rooms and working spaces in which flammable materials are not stored, drying rooms and laundries. (6) Machinery spaces of Category A are those spaces and trunks to such spaces which contain : (a) internal combustion machinery used for main propulsion ; or (b) internal combustion machinery used for purpose other than main propulsion where such machinery has in the aggregate a total power output of not less than 375 kW ; or (c) any oil-fired boiler or oil fuel unit. (7) Other machinery spaces are all other machinery spaces than machinery spaces of Category A, containing propelling machinery, boilers, oil fuel units, steam and internal combustion engines, generators and major electrical machinery, oil filling stations, refrigerating, stabilizing, ventilating and air-conditioning machi- nery and similar spaces, including trunks to such spaces. (8) Hazardous areas are areas as defined in Ch 7, 102. 1. (9) Service spaces (high risk) are lockers, store-rooms and working spaces in which flammable materials are stored, galleys, pantries containing cooking appliances, paint rooms and workshops other than those forming part of the machinery space. (10) Open decks are open deck spaces, excluding hazardous areas. (11)Sanitary and similar spaces are communal sanitary facilities such as showers, bath, lavatories, etc., and isolated pantries containing no cooking appliances. Sanitary facilities which serve a space and with ac- cess only from that space are to be considered a portion of the space in which they are located. 2. Explanation for the subscripts and the marks on the table (a) Where the space contains an emergency power source or components of an emergency power source ad- joining a space containing a ship's service generator or the components of a ship'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 201. 9 (3) and (5). (c) Where spaces are of the same numerical category and superscript (c) appears, a bulkhead or deck of rat- ing shown in the table is only required when the adjacent spaces are for a different purpose, e.g. in category (9). 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. Where an asterisk " * " appears in the table, the division is required to be of steel or equivalent material but not required to be of "A" class standard. (e) An engineering evaluation should be conducted in accordance with 201. 9 (1). In no case should the bulkhead or deck rating be less than the value indicated in the tables. Where an asterisk " * " appears in the table, the division is required to be of steel or equivalent materi- al but not required to be of "A" class standard. Where " - " appears in the table, the division need not be of "A", "B" nor "C" class divisions. | ||||||||||||
Table 9.2 Fire Integrity of Decks Separating Adjacent Spaces
Spaces above deck Spaces below deck | (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) |
stations (1) | A-0 | A-0 | A-0 | A-0 | A-0 | A-60 | A-0 | A-0 | A-0 | * | A-0 |
Corridors (2) | A-0 | * | * | A-0 | * | A-60 | A-0 | A-0 | A-0 | * | * |
Accommodation spaces (3) | A-60 | A-0 | * | A-0 | * | A-60 | A-0 | A-0 | A-0 | * | * |
Stairways (4) | A-0 | A-0 | A-0 | * | A-0 | A-60 | A-0 | A-0 | A-0 | * | A-0 |
Service spaces(low risk) (5) | A-15 | A-0 | A-0 | A-0 | * | A-60 | A-0 | A-0 | A-0 | * | A-0 |
Machinery spaces of Category A (6) | A-60 | A-60 | A-60 | A-60 | A-60 | *(a) | A-60 | A-60 | A-60 | * | A-0 |
Other machinery spaces (7) | A-15 | A-0 | A-0 | A-0 | A-0 | A-0(a) | *(a) | A-0 | A-0 | * | A-0 |
Hazardous areas (8) | A-60 | A-0 | A-0 | A-0 | A-0 | A-60 | A-0 | - | A-0 | - | A-0 |
Service spaces(high risk) (9) | A-60 | A-0 | A-0 | A-0 | A-0 | A-0 | A-0 | A-0 | A-0(c) | * | A-0 |
Open deck (10) | * | * | * | * | * | * | * | - | * | - | * |
Sanitary and similar spaces (11) | A-0 | A-0 | * | A-0 | * | A-0 | A-0 | A-0 | A-0 | * | * |
Note : The explanation for spaces, subscripts and marks on the table are as indicated in the Notes of Table 9.1 | |||||||||||
(7) Except for insulation in refrigerated compartments, insulation material, pipe and vent duct lag- ging, ceilings, linings and bulkheads are to be of non-combustible material. Insulation of pipe fittings for cold service systems and vapour barriers and adhesives used in conjunction with in- sulation need not be non-combustible but they are to be kept to a minimum and their exposed surfaces are to have low flame spread characteristics. In spaces where penetration of oil prod- ucts is possible, the surfaces of the insulation are to be impervious to oil or oil vapours.
(8) The framing, including grounds and the joint pieces of bulkheads, linings, ceilings and draught stops are to be of non-combustible material.
(9) All exposed surfaces in corridors and stairway
enclosures and surfaces in concealed or in-
accessible spaces in accommodation and service spaces and control stations are to have low flame spread characteristics. Exposed surfaces of ceilings in accommodation and service spaces and control stations are to have low flame spread characteristics.
(10) Bulkheads, linings and ceilings may have combustible veneers provided that the thickness of such veneers is not to exceed 2 mm within any space other than corridors, stairway enclosures and control stations where the thickness is not to exceed l.5 mm . Alternately, thicker veneers of low calorific value not exceeding 45 MJ m will be considered.
(11) Primary deck coverings, if applied, are to be of approved materials by the Society which will not readily ignite, or give rise to toxic or explosive hazards at elevated temperatures.
(12) Paints, varnishes and other finishes used on exposed interior surfaces are not to offer an un- due fire hazard in the judgement of the Society and are not to be capable of producing ex-
cessive quantities of smoke or toxic fumes.
(13) Ventilation ducts are to be of steel or equivalent material. However, short ducts, not generally
exceeding 2 m in length and with a free cross-sectional area not exceeding 0.02 m , need not be steel or equivalent subject to the following conditions :
(A) subject to (B), the ducts are made of a material which has low flame spread characteristics;
(B) the ducts are ot be made of heat resisting non-combustible material, which may be faced in- ternally and externally with membranes having low flame-spread characteristics and, in each case, a calorific value not exceeding 45 MJ m of their surface area for the thickness used;
(C) the ducts are only used at the end of the ventilation device; and
(D) the ducts are not situated less than 600 mm , measured along the duct, from an opening in
an "A" or "B" class division including continuous "B" class ceiling.
(14) Where a thin plated duct with a free cross-sectional area equal to, or less than, 0.02 m pass- es through "A" class bulkheads or decks, the opening shall be lined with a steel sheet sleeve having a thickness of at least 3 mm and a length of at least 200 mm , divided
100 mm on each side of the bulkhead or, in the case of the deck, wholly laid on the lower side of the decks pierced. Where ventilation ducts with a free cross-sectional area exceeding
0.02 m pass through "A" class bulkheads or decks, the opening is to be lined with a steel sheet sleeve. However, where such ducts are of steel construction and pass through a
deck or bulkhead, the ducts and sleeves are to comply with the following:
(A) The sleeves are to have a thickness of at least 3 mm and a length of at least 900 mm .
When passing through bulkheads, this length is to be divided preferably into 450 mm on each side of the bulkhead. These ducts, or sleeves lining such ducts, are to be provided with fire insulation. The insulation is to have at least the same fire integrity as the bulk- head or deck through which the duct passes; and
(B) Ducts with a free cross-sectional area exceeding 0.075 m shall be fitted with fire dampers in addition to the requirements of paragraph (A). The fire damper is to operate automati- cally, but is also to be capable of being closed manually from both sides of the bulkhead or deck. The damper shall be provided with an indicator which shows whether the damper is open or closed. Fire dampers are not required, however, where ducts pass through spaces surrounded by "A" class divisions, without serving those spaces, provided those ducts have the same fire integrity as the divisions which they pierce. Fire dampers are to be easily accessible. Where they are placed behind ceilings or linings, these ceilings or linings are to be provided with an inspection door on which a plate reporting the identification number of the fire damper is provided. The fire damper identification number is also to be placed on any remote controls required.
(15) Ducts provided for ventilation of machinery spaces of Category A, galleys and hazardous areas are not to pass through accommodation or service spaces or control stations. However, ducts provided for ventilation of machinery spaces of Category A and galleys, excluding hazardous areas, may pass through accommodation or service spaces or control stations where they comply with the conditions specified in paragraphs (A) to (D) or (E) and (F) below:
(A) the ducts are constructed of steel having a thickness of at least 3 mm and 5 mm for ducts the widths or diameters of which are up to and including 300 mm and 760 mm and over respectively and, in the case of such ducts, the widths or diameters of which are between 300 mm and 760 mm having a thickness obtained by interpolation;
(B) the ducts are suitably supported and stiffened;
(C) the ducts are fitted with automatic fire dampers close to the boundaries penetrated; and
(D) the ducts are insulated to "A-60" class standard from the machinery spaces, galleys, vehicle
spaces, ro-ro spaces or special category spaces to a point at least 5 m beyond each fire damper; or
(E) the ducts are constructed of steel in accordance with paragraphs (A) and (B); and
(F) the ducts are insulated to "A-60" class standard throughout the accommodation spaces, serv- ice spaces or control stations.
(16) Ducts provided for ventilation of accommodation, service spaces or control stations are not to
pass through machinery spaces of Category A, galleys and hazardous areas. However, ducts pro- vided for ventilation to accommodation spaces, service spaces or control stations may pass through machinery spaces of category A and galleys excluding hazardous areas where they com- ply with the conditions specified in paragraphs (A) to (C) or (D) and (E) below:
(A) the ducts where they pass through a machinery space of category A and galley are con- structed of steel in accordance with paragraphs (11) (A) and (11) (B);
(B) automatic fire dampers are fitted close to the boundaries penetrated; and
(C) the integrity of the machinery space and galley boundaries is maintained at the penetrations; or
(D) the ducts where they pass through a machinery space of category A and galley are con-
structed of steel in accordance with paragraphs (11) (A) and (11) (B); and
(E) the ducts are insulated to "A-60" standard within the machinery space and galley.
(17) Ventilation ducts with a free cross-sectional area exceeding 0.02 m passing through "B" class bulkheads are to be lined with steel sheet sleeves of 900 mm in length divided preferably into 450 mm on each side of the bulkheads unless the duct is of steel for this length.
(18) Where they pass through accommodation spaces or spaces containing combustible materials, the exhaust ducts from galley ranges should be of equivalent fire integrity to "A" class divisions
and each galley exhaust duct should be fitted with:
(A) a grease trap readily removable for cleaning;
(B) a fire damper located in the galley end of the duct which is automatically and remotely op-
erated and, in addition a remotely operated fire damper located in the exhaust end of the duct;
(C) arrangements, operable from within the galley, for shutting off the exhaust fans; and
(D) fixed means for extinguishing a fire within the duct.
(19) The main inlets and outlets of all ventilation systems shall be capable of being closed from outside the spaces being ventilated.
(20) Power ventilation of accommodation spaces, service spaces, cargo spaces, control stations and machinery spaces shall be capable of being stopped from an easily accessible position outside
the space being served. The accessibility of this position in the event of a fire in the spaces
served is to be specially considered. The means provided for stopping the power ventilation serving machinery spaces or hazardous areas are to be entirely separate from the means pro- vided for stopping ventilation of other spaces.
(21) Windows and sidescuttles in the boundaries which are required to meet an "A-60" standard which face the drill floor area are to be constructed to an "A-60" standard or fitted with inside covers of steel or other material equivalent thereto. Such shutters may be replaced by a wa- ter-curtain, which provide a discharge rate of 6.0 m -min , protecting those windows and side- scuttles on the exposed wall.
(22) The ventilation of the accommodation spaces and control stations is to be arranged in such a way as to prevent the ingress of flammable, toxic or noxious gases, or smokes from surround- ing areas.
202. Means of escape
1. Within the accommodation spaces, service spaces and control stations, the means of escape speci- fied in the following (1) to (4) are to be provided.
(1) In every general area which is likely to be regularly manned or in which personnel are accom- modated, at least two separate escape routes are to be provided, situated as far apart as practi- cable, to allow ready means of escape to the open decks and embarkation stations. Where, how- ever, deemed appropriate by the Society in consideration of the nature and location of spaces and the number of persons who might normally be accommodated or employed there, one of these means of escape may be dispensed with.
(2) Stairways are normally to be used for means of vertical escape. Where, however, the installation of a stairway is shown to be impracticable, a vertical ladder may be used for one of the means of escape.
(3) Every escape
route is to be readily accessible and unobstructed. All exit doors along the route
are to be readily operable. Dead-end corridors exceeding 7 m in length are not to be provided.
(4) In addition to the emergency lighting, the means of escape in accommodation areas, including stairways and exits, is to be marked by lighting or photoluminescent strip indicators placed not more than 300 mm above the deck at all points of the escape route, including angles and intersections. The marking is to enable personnel to identify the routes of escape and readily identify the escape exits. If electric illumination is used, it should be supplied by the emergency source of power and it is to be so arranged that the failure of any single light or cut in a lighting strip will not result in the marking being ineffective. Additionally, escape route signs and fire equipment location markings should be of photoluminescent material or marked by lighting. The Society is to ensure that such lighting or photoluminescent equipment has been evaluated, tested and applied in accordance with the FSS Code.
2. Two means of escape are to be provided from every machinery space of Category A by either one of the following (1) or (2). Where, however, deemed appropriate by the Society in consideration of the nature and location of spaces and the number of persons who might normally be employed there, one of these means of escape may be dispensed with.
(1) Two sets of steel ladders, as widely separated as possible, leading to doors in the upper part of the space similarly separated and from which access is provided to the open deck. In general, one of these ladders is to provide continuous fire shelter from the lower part of the space to a safe position outside the space. This shelter is to be of steel insulated to the satisfaction of the Society and be provided with a self-closing steel door at the lower end. However, in cases where a safe escape route from the lower part of this space is provided due to special arrange- ments or dimension of machinery space, the shelter may be dispensed with at the discretion of the Society.
(2) One steel ladder leading to a door in the upper part of the space from which access is pro- vided to the open deck and additionally, in the lower part of the space and in a position well separated from the ladder referred to, a steel door capable of being operated from each side and which provides access to a safe escape route from the lower part of the space to the open deck.
3. From machinery spaces other than those of Category A, escape routes are to be provided to the satisfaction of the Society, having regard to the nature and location of the space and whether per- sons are normally employed in that space.
4. Lifts are not to be considered as forming one of the required means of escape.
5. Consideration is to be given to the site of superstructures and deckhouses such that in the event of fire at the drill floor at least one escape route to the embarkation position and survival craft is protected against radiation effects of that fire as far as practicable.
6. Stairways and corridors used as a means of escape are to meet the provisions of paragraph 13.3 of the FSS Code.
7. Emergency escape breathing devices are to comply with the following requirements.
(1) Emergency escape breathing devices are to comply with the Fire Safety Systems Code. Spare emergency escape breathing devices shall be kept onboard.
(2) In machinery spaces of category A containing internal combustion machinery used for main pulsion, EEBDs are to be positioned as follows:
(A) one (1) EEBD in the engine control room, if located within the machinery space;
(B) one (1) EEBD in workshop areas. If there is, however, a direct access to an escape from the workshop, an EEBD is not required; and
(C) one (1) EEBD on each deck or platform level near the escape ladder constituting the
pro-
way sec-
ond means of escape from the machinery space (the other means being an enclosed escape trunk or watertight door at the lower level of the space).
(D) Alternatively, a different number or location may be determined by the Society taking into
consideration the layout and dimensions or the normal manning of the space.
(3) For machinery spaces of category A other than those containing internal combustion machinery
used for main propulsion, one (1) EEBD is to, as a
platform level near the escape ladder constituting the
minimum, be provided on each deck or
second means of escape from the space
(the other means being an enclosed escape trunk or watertight door at the lower level of the space).
(4) For other machinery spaces, the number and location of EEBDs are to be determined by the
Society.