Oil and Gas Occupational Safety and Health Regulations

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.