Government of Canada / Gouvernement du Canada
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Nova Scotia Offshore Petroleum Installations Regulations (SOR/95-191)

Regulations are current to 2021-06-28 and last amended on 2020-10-06. Previous Versions

PART IGeneral Requirements (continued)

Mechanical Equipment

  •  (1) Every internal combustion engine on an installation shall be installed, maintained and operated in accordance with American Petroleum Institute RP 7C-llF, Recommended Practice for Installation, Maintenance and Operation of Internal-Combustion Engines.

  • (2) Combustion air for every internal combustion engine and fired vessel shall be taken from non-hazardous areas.

  • (3) Exhaust gas from every internal combustion engine and fired vessel shall be discharged to non-hazardous areas.

  • (4) The air induction system of every diesel engine operating in a hazardous area shall be equipped with

    • (a) a flame arrester in the induction system;

    • (b) a shut-off valve that is located between the engine air inlet filter and the induction system flame arrester and that is capable of being closed automatically by the engine overspeeding device and manually;

    • (c) a flame arrester in the exhaust system; and

    • (d) a spark arrester in the exhaust system, downstream of the flame arrester.

  • (5) Subject to subsection (13), the fuel supply system for every diesel engine shall be equipped with a manual shut-off device and, except for the emergency source of electrical power required by section 12, with a device that will automatically shut off the fuel supply if any of the following occur:

    • (a) overspeeding;

    • (b) high exhaust temperature;

    • (c) high cooling water temperature; or

    • (d) low lubricating oil pressure.

  • (6) The engine crankcase breather pipe on every diesel engine shall

    • (a) be equipped with a flame arrester; and

    • (b) in the case of an engine in an enclosed Class I, Division 2, hazardous area, lead to the atmosphere outside the installation.

  • (7) Basic operating instructions for every diesel engine shall give details of stop, start and emergency procedures and be permanently attached to the engine.

  • (8) The layout of every gas turbine, including the location of the control points, shall take into account the ability of the control point closest to the turbine to withstand pressure waves in the event of an explosion in the gas turbine exhaust duct or gas turbine hall and the effects of the failure of a gas turbine rotor where the fragments cannot be contained.

  • (9) Every gas turbine shall have, in addition to the speed governor, a separate overspeed device, arranged and adjusted so that the manufacturer’s overspeed limitations for the turbine cannot be exceeded by more than 15 per cent.

  • (10) The air intakes and exhaust for every gas turbine shall be arranged to prevent, to the extent practicable, reingestion of combustion gases.

  • (11) Every multi-engine gas turbine shall have a separate air intake and exhaust, arranged so as to prevent induced circulation through a stopped turbine.

  • (12) All machinery, components and systems essential to the operation of a floating platform shall be designed to function at full rated power at any inclination, up to a maximum angle of

    • (a) in the case of a surface mobile platform,

      • (i) 15 degrees in any direction under static conditions,

      • (ii) 22½ degrees in any direction under rolling dynamic conditions, and

      • (iii) 7½ degrees by bow or stern under rolling dynamic conditions;

    • (b) for a column-stabilized mobile platform, 15 degrees in any direction; and

    • (c) for a self-elevating platform, 10 degrees in any direction.

  • (13) The automatic shut-off device referred to in subsection (5) shall shut off the fuel supply to engines associated with fire pump systems only where overspeeding occurs.

  • (14) Jacking mechanisms for self-elevating platforms shall, where possible, be arranged with redundancy so that a single failure of any component does not cause an uncontrolled descent of the platform.


  •  (1) Every installation shall be designed, constructed, equipped and insulated to ensure that, at the minimum air temperature that may occur at the drill site or production site during operations, based on an annual probability of exceedance of 10-2,

    • (a) in the case of a production installation, the production equipment and other associated equipment will operate in a safe and efficient manner;

    • (b) the emergency shutdown system referred to in section 18 will perform its intended functions;

    • (c) drilling safety systems and associated equipment will operate safely and in accordance with the manufacturer’s specifications;

    • (d) the fluids in the following systems and components will not freeze, namely,

      • (i) fresh water tanks and the associated piping,

      • (ii) vent pipes,

      • (iii) components of the drainage system,

      • (iv) the hydraulic system and its components, including operators and cylinders, and

      • (v) the firefighting system, including pump drives and fuel supply lines, fire pumps and associated piping, fire hydrants, fire hoses and nozzles;

    • (e) every pneumatic control system will remain fully operational at all times;

    • (f) the lifesaving appliances and associated devices will remain operational; and

    • (g) in the case of a mobile platform,

      • (i) the fluid in an operating ballast system, including the pumps, control systems and associated piping and valves, is protected against freezing,

      • (ii) the proper functioning of any thrusters is not impaired and the hydraulic fluid and lubricants for the thrusters have properties designed for such a temperature, and

      • (iii) the mooring winches and, where the platform is so equipped, the quick disconnect system will remain fully operational.

  • (2) Every installation shall be equipped with steam-generating equipment, or an equivalent means, that will keep the locations mentioned in subsection (3) free of ice and snow and lines thawed so as to permit drilling, production and maintenance operations to be conducted safely.

  • (3) Every installation that is equipped with steam-generating equipment, or an equivalent means, required by subsection (2) shall include outlets, hoses and hose clamps capable of being used in the following locations:

    • (a) work areas;

    • (b) walkways; and

    • (c) the helicopter deck and the lifeboat embarkation stations.

  • (4) Where temperatures below -20°C may occur, based on an annual probability of exceedance of 10-2, at the drill site or production site more than one day per year and where the installation is equipped with steam-generating equipment, or an equivalent means, required by subsection (2),

    • (a) that equipment shall meet the requirements set out in subsection (2) when operating at 75 per cent capacity; and

    • (b) the installation shall be equipped with a second set of steam-generating equipment or another means of providing equivalent protection against ice, snow and freezing.

  • SOR/2009-317, s. 100

Corrosion Protection

  •  (1) All structural elements that are part of an installation and the failure of which as a result of corrosion would cause a safety hazard shall be protected or constructed with extra material so as to prevent the degree of corrosion that may cause that structural element to fail and shall be protected against corrosion in accordance with section 4.15 of Canadian Standards Association CAN/CSA-S471-92, General Requirements, Design Criteria, the Environment, and Loads.

  • (2) Corrosion protection systems for installations shall be designed, installed and maintained in accordance with

    • (a) section 15 of Canadian Standards Association CAN/CSA-S473-92, Steel Structures, Offshore Structures, in the case of steel platforms; and

    • (b) sections 4.9.5, 5.1.1, 5.3, 5.4.2, 5.6, 5.10 and 11.19 of Canadian Standards Association Preliminary Standard S474-M1989, Concrete Structures, in the case of concrete platforms.

  • (3) All corrosion protection systems on an installation shall be designed so that adjustment, repair or replacement can be done on site, except where

    • (a) dry dock surveys are possible and are scheduled at a frequency of five years or less; or

    • (b) the corrosion protection system is a cathodic protection system that has a design life exceeding that of the installation.

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