Oil and Gas Occupational Safety and Health Regulations (SOR/87-612)

6.2 This Part does not apply to

• (a) a heating boiler that has a heating surface of 3 m² or less;

• (b) a pressure vessel that has a capacity of 40 L or less;

• (c) a pressure vessel that is installed for use at a pressure of 100 kPa or less;

• (d) a pressure vessel that has an internal diameter of 150 mm or less;

• (e) a pressure vessel that has an internal diameter of 600 mm or less and that is used for the storage of hot water;

• (f) a pressure vessel that has an internal diameter of 600 mm or less and that is connected to a water-pumping system containing air that is compressed to serve as a cushion; or

• (g) a refrigeration plant that has a capacity of 18 kW or less of refrigeration.

6.3 Every boiler, pressure vessel and piping system used in a work place shall be constructed, tested and installed by a qualified person.

• 6.4 (1) No person shall use a boiler, pressure vessel or piping system unless it has been inspected by an inspector in accordance with subsection (2).

• (2) Every boiler, pressure vessel and piping system shall be inspected in accordance with sections 6.8 to 6.10

  • (a) after installation; and

  • (b) after any welding, alteration or repair is carried out on it.

6.5 Every boiler, pressure vessel and piping system in use at a work place shall be operated, maintained and repaired by a qualified person.

6.6 No person shall alter, interfere with or render inoperative any fitting attached to a boiler, pressure vessel or piping system except for the purpose of adjusting or testing the fitting.

6.7 Notice of a proposed backfilling over a buried pressure vessel shall be given to the regional safety officer before the backfilling is begun.

• 6.8 (1) Subject to section 6.9, every boiler, pressure vessel and piping system in use in a work place shall be inspected

  • (a) externally, at least once each year; and

  • (b) internally, at least once every five years.

• (2) Paragraph (1)(a) does not apply to a pressure vessel that is buried.

• 6.9 (1) Where a pressure vessel is used to store anhydrous ammonia, a hydrostatic test at a pressure equal to one and one-half times the maximum allowable working pressure shall be conducted at least once every five years.

• (2) The integrity of a pressure vessel that is a part of a motion compensator system or blowout preventer shall be verified at least once every five years by

  • (a) where practicable, an internal inspection; or

  • (b) where an internal inspection is not practicable, by a hydrostatic test or other non-destructive test method.