Canada Oil and Gas Installations Regulations (SOR/96-118)

32 (1) Every offshore installation shall be equipped with a gas detection system that is capable of detecting, in every part of the installation in which hydrogen sulphide or any type of hydrocarbon gas may accumulate, the presence of those gases.

(2) The gas detection system required by subsection (1) shall, on detection of gas, activate automatically

• (a) an audible and visual signal on the fire and gas indicator panel in the control station of a manned installation; and

• (b) an audible alarm that has a tone different from any other alarm in any part of the installation.

(3) Every offshore installation shall be equipped with

• (a) at least two portable gas detectors capable of

  • (i) measuring the concentration of oxygen in any space, and

  • (ii) detecting hydrogen sulphide and any type of hydrocarbon gas in any space; and

• (b) a means of testing the portable gas detectors described in paragraph (a).

(4) A gas detector shall be provided

• (a) at every ventilation inlet duct leading to a non-hazardous area on every installation;

• (b) in every Class I, Division 1, hazardous area on every onshore installation; and

• (c) in every enclosed hazardous area on every offshore installation.

(5) Every gas detector provided in accordance with subsection (3) shall be appropriate for the area and installed and operated in accordance with

• (a) Appendix C of American Petroleum Institute RP 14C, Recommended Practice for Analysis, Design, Installation and Testing of Basic Surface Safety Systems for Offshore Production Platforms; and

• (b) section 9.2 of American Petroleum Institute RP 14F, Recommended Practice for Design and Installation of Electrical Systems for Offshore Production Platforms.