PART IGeneral Requirements (continued)
Ventilation of Hazardous Areas
(2) The ventilation systems fitted on an offshore installation for the purpose of subsection (1) shall be capable of replacing the air in the hazardous area at the rate of once every five minutes.
(3) Where a mechanical ventilation system is used for the purpose of subsection (1), the air in the enclosed hazardous area shall be maintained at a pressure that is lower than the pressure of each adjacent hazardous area that is classified as less hazardous.
(4) All air let into an enclosed hazardous area shall be taken from a non-hazardous area, and where the inlet duct passes through a hazardous area classified as more hazardous than the one to which the duct leads, the air in the inlet duct shall be maintained at a pressure that is higher than the pressure of the air in the hazardous area through which it passes.
(5) All air let out of an enclosed hazardous area shall be let into an outdoor area that would be classified as the same as or less hazardous than the enclosed hazardous area if it did not receive the air from the enclosed hazardous area.
(6) The ventilation system for every non-hazardous area shall be separate from the ventilation system for every hazardous area, and the ventilation fan inlets and outlets shall be arranged to prevent the air from a hazardous area from moving, as a result of the operation of any fan or the wind, into an area classified as less hazardous.
(7) Every ventilation outlet duct leading from a non-hazardous area where drilling or production operations are conducted to a Class I, Division 2, hazardous area shall be equipped with self-closing shutters and a gas detector.
(8) A differential pressure gauge shall be installed to monitor any loss of ventilation pressure differential required by subsection (3) or (4) or maintained under section 9, and to activate audible and visual alarms at the appropriate control point after a suitable period of delay not exceeding 30 seconds if a loss occurs.
(9) The control station and all accommodation areas on an installation shall
(10) The power for a mechanical ventilation system provided in accommodation areas, working areas, flammable liquid storage areas and other hazardous locations of an installation shall be capable of being shut off from the control station and from a position that is outside the area being served by the ventilation system and that will remain accessible during any fire that may occur within the area being ventilated.
(11) The main inlets and outlets of all ventilation systems shall be capable of being closed from a position that is outside the area being served by the ventilation system and that will remain accessible during any fire that may occur within the area being ventilated.
General Electrical Standards
11 (1) Subject to subsections (2) to (4), all electric motors, lighting fixtures, electric wiring and other electrical equipment on an installation shall be designed, installed and maintained in accordance with
(a) in the case of an onshore installation, Canadian Standards Association Standard C22.l-l990, Canadian Electrical Code Part I, Safety Standard for Electrical Installations; and
(b) in the case of an offshore installation, American Petroleum Institute RP l4F, Recommended Practice for Design and Installation of Electrical Systems for Offshore Production Platforms.
(2) Electrical wiring on an offshore installation shall be
(a) designed in accordance with International Electrotechnical Commission Publication 92-3, Electrical Installations in Ships, Part 3: Cables (construction, testing and installations) and tested for Category A in accordance with International Electrotechnical Commission Publication 332-3, Tests on electrical cables under fire conditions, Part 3: Tests on bunched wires or cables; and
(b) tested for impact at -35°C and bending at -40°C in accordance with Canadian Standards Association Standard C22.2 No. 0.3-M1985, Test Methods for Electrical Wires and Cables.
(3) Where a primary or secondary distribution system for power, heating or lighting, with no connection to earth, is used on an offshore installation, a device capable of continuously monitoring the insulation level to earth and of giving an audible or visual indication of abnormally low insulation values shall be provided.
(4) The primary source of electrical power on every offshore installation shall
(a) include at least two power plants;
(b) be capable of supporting all normal operations without recourse to the emergency source of electrical power required by section 12; and
(c) if one of the power plants is out of operation, be capable of supporting all operations except drilling and production operations.
(5) The primary circuits from the power plant serving an installation shall be equipped with at least two manual shut-off switches, each at a different location.
Emergency Electrical Power
12 (1) Every offshore installation shall have an emergency source of electrical power that is independent of the primary source of electrical power and that is capable of supplying electrical power sufficient to operate, for at least twenty-four hours, the following equipment:
(a) all lights referred to in subsection (2);
(b) all gas detection and alarm systems;
(c) all fire detection and alarm systems;
(d) all firefighting systems except any fire pump that is driven by a liquid fuelled combustion engine;
(e) the general alarm system and all internal communication systems;
(f) the emergency shut down system referred to in section 18;
(g) all lifesaving systems;
(h) all navigation lights, sound signal systems and illuminated markings, that are required by section 21;
(i) all radio communication equipment necessary to comply with the contingency plans referred to in section 44;
(j) on a mobile offshore platform, the main ballast control system, one ballast pump for each individual ballast system and one bilge pump for each individual bilge system;
(k) on a column-stabilized mobile offshore platform, the secondary ballast control system;
(l) all equipment necessary to secure the production or drilling operations in progress at any one time in a safe manner, including a well disconnect system;
(m) if a pumping system is required under paragraph (l), one pump that is not driven by an internal combustion engine that has sufficient capacity to kill any well on the installation;
(n) any blow-out prevention system; and
(o) any manned diving equipment dependent on an electrical supply.
(2) Every offshore installation shall be equipped with lights supplied by the emergency source of power described in subsection (1), in the following locations:
(a) every embarkation station on deck and over sides;
(b) every escape route and area containing escape route markings;
(c) all service corridors and corridors in accommodation areas, and all stairways, exits and personnel lift cars;
(d) all machinery spaces and main generating stations;
(e) the control station and all control points;
(f) all spaces from which the drilling and production operations are controlled and at which controls of machinery essential for the performance of those operations and devices for the emergency shut-down of the power plant are located;
(g) the stowage positions for firefighting equipment;
(h) each sprinkler pump and fire pump and each ballast and bilge pump, referred to in paragraph (1)(j), and the starting position for each pump;
(i) every helicopter landing deck and every obstacle marker on that deck; and
(j) the radio room.
(3) Where the emergency source of electrical power required by subsection (1) is a mechanically driven generator, the offshore installation shall be provided with
(a) a transitional source of electrical power, unless the generator will automatically start and supply the power required by subsection (1) in less than 45 seconds from the time the primary source of electrical power fails; and
(b) a self-contained battery system designed to supply sufficient power, automatically on failure or shutdown of both the primary and the emergency sources of electrical power, to operate, for a period of at least one hour the equipment described in subparagraphs (i) and (ii) and, for a period of at least four days, the equipment described in subparagraph (iii):
(i) the lights located in every emergency exit route, at every escape route, in every machinery space, the control station and every emergency assembly room and at every launching station of the lifesaving system,
(ii) the internal communication system and the general alarm system, and
(iii) the navigation lights, sound signal systems and illuminated markings referred to in section 21.
(4) The battery system referred to in paragraph (3)(b) shall be capable of returning to the trickle charge state on restoration of the primary or emergency source of electrical power.
(5) The emergency source of electrical power required by subsection (1) shall, for a floating platform, be designed to function at full rated power when the installation is upright and when it is at any inclination up to a maximum angle of
(a) 22½ degrees about the longitudinal axis and 10 degrees about the transverse axis, in the case of a surface mobile offshore platform;
(b) 25 degrees in any direction, in the case of a column- stabilized mobile offshore platform; and
(c) 15 degrees in any direction, in the case of a self-elevating platform.
(6) The location of the emergency source of electrical power and associated fuel storage, the transitional source of power, if any, and the emergency switchboard on an offshore installation shall be
(a) readily accessible from an open deck space;
(b) segregated by class A-60 divisions, as defined in subsection 23(1), from any space containing the main source of electrical power or the internal combustion engines;
(c) outside any hazardous area; and
(d) for a floating platform, located above the waterline that would exist if the platform were in a damaged condition and in a space outside any part of the platform if it were in that damaged condition.
(7) Every onshore drilling rig except a drilling rig located on an ice platform shall have an emergency source of electrical power that is independent of the primary source of electrical power and that is capable of supplying electrical power sufficient to operate, for at least twenty-four hours, the following equipment:
(a) all warning systems;
(b) all emergency lighting;
(c) the general alarm system and internal communication system;
(d) all fire extinguishing systems, except any fire pump that is driven by an internal combustion engine that is liquid fuelled; and
(e) all equipment necessary to secure production or drilling operations in progress at any one time in a safe manner, including a well control system.
(8) Every drilling rig that is located on an ice platform shall have an emergency source of electrical power that is
(9) The emergency source of electrical power required by subsection (1), (7) or (8) shall be designed to supply electrical power automatically, on failure of the primary source of electrical power, to a switchboard that is designed to direct the power to the equipment listed in that subsection.
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