Class 2 Gases Criteria The heading of Class 2 covers pure gases, mixtures of gases, mixtures of one or more gases with one or more other substances and articles containing such substances. A gas is a substance which: at 50 °C has a vapour pressure greater than 300 kPa (3 bar); or is completely gaseous at 20° C at the standard pressure of 101.3 kPa. NOTE 1: UN No. 1052 HYDROGEN FLUORIDE, ANHYDROUS is nevertheless classified in Class 8. NOTE 2: A pure gas may contain other components deriving from its production process or added to preserve the stability of the product, provided that the level of these components does not change its classification or its conditions of carriage, such as filling ratio, filling pressure, test pressure. NOTE 3: N.O.S. entries in 2.2.2.3 may cover pure gases as well as mixtures. The substances and articles of Class 2 are subdivided as follows: a gas which when packaged under pressure for carriage is entirely Compressed gas: gaseous at -50 °C; this category includes all gases with a critical temperature less than or equal to -50 °C; a gas which when packaged under pressure for carriage is partially Liquefied gas: liquid at temperatures above -50 °C. A distinction is made between: a gas with a critical temperature above -50 °C and equal High pressure liquefied gas: to or below +65 °C; and a gas with a critical temperature above +65 °C; Low pressure liquefied gas: a gas which when packaged for carriage is made partially Refrigerated liquefied gas: liquid because of its low temperature; a gas which when packaged under pressure for carriage is dissolved in Dissolved gas: a liquid phase solvent; Aerosol dispensers and receptacles, small, containing gas (gas cartridges); Other articles containing gas under pressure; Non-pressurized gases subject to special requirements (gas samples); Chemicals under pressure: liquids, pastes or powders, pressurized with a propellant that meets the definition of a compressed or liquefied gas and mixtures thereof. a gas which when packaged for carriage is adsorbed onto a solid porous Adsorbed gas: material resulting in an internal receptacle pressure of less than 101.3 kPa at 20 C and less than 300 kPa at 50 C.
Class 2 Gases Criteria The heading of Class 2 covers pure gases, mixtures of gases, mixtures of one or more gases with one or more other substances and articles containing such substances. A gas is a substance which: at 50 °C has a vapour pressure greater than 300 kPa (3 bar); or is completely gaseous at 20° C at the standard pressure of 101.3 kPa. NOTE 1: UN No. 1052 HYDROGEN FLUORIDE, ANHYDROUS is nevertheless classified in Class 8. NOTE 2: A pure gas may contain other components deriving from its production process or added to preserve the stability of the product, provided that the level of these components does not change its classification or its conditions of carriage, such as filling ratio, filling pressure, test pressure. NOTE 3: N.O.S. entries in 2.2.2.3 may cover pure gases as well as mixtures. The substances and articles of Class 2 are subdivided as follows: Compressed gas: a gas which when packaged under pressure for carriage is entirely gaseous at -50 °C; this category includes all gases with a critical temperature less than or equal to -50 °C; Liquefied gas: a gas which when packaged under pressure for carriage is partially liquid at temperatures above -50 °C. A distinction is made between: High pressure liquefied gas: a gas with a critical temperature above -50 °C and equal to or below +65 °C; and Low pressure liquefied gas: a gas with a critical temperature above +65 °C; Refrigerated liquefied gas: a gas which when packaged for carriage is made partially liquid because of its low temperature; Dissolved gas: a gas which when packaged under pressure for carriage is dissolved in a liquid phase solvent; Aerosol dispensers and receptacles, small, containing gas (gas cartridges); Other articles containing gas under pressure; Non-pressurized gases subject to special requirements (gas samples); Chemicals under pressure: liquids, pastes or powders, pressurized with a propellant that meets the definition of a compressed or liquefied gas and mixtures thereof. Adsorbed gas: a gas which when packaged for carriage is adsorbed onto a solid porous material resulting in an internal receptacle pressure of less than 101.3 kPa at 20 C and less than 300 kPa at 50 C.
ADN%20vol.II_E.docx