Hazardous Products Regulations
7.2.1 (1) Any product that is classified in a category of the hazard class “Flammable Aerosols” need not be classified in any category of this hazard class.
(2) A flammable gas is classified in a category of this hazard class in accordance with the following table:
Item Column 1 Column 2 Category Criteria 1 Flammable Gases — Category 1
A gas that
(a) is ignitable when mixed with air at a concentration ≤ 13.0% by volume; or
(b) has a flammable range when mixed with air ≥ 12 percentage points, regardless of the lower flammable limit
2 Flammable Gases — Category 2 A gas that is not classified in the category “Flammable Gases — Category 1” and has a flammable range when mixed with air
Marginal note:Calculation method
(3) Test data have priority over data obtained using a calculation method. If a calculation method is used to establish whether a gas is classified in a category of this hazard class, the calculation method set out in the International Organization for Standardization standard ISO 10156:2010 entitled Gases and gas mixtures — Determination of fire potential and oxidizing ability for the selection of cylinder valve outlets, as amended from time to time, or any other calculation method that is a scientifically validated method, must be used.
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