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What is the Potential Hazard of the Compressed Gas?
Posted Date:2016/7/8 1
Compressed gas means a gas which when packaged under pressure is entirely gaseous at -50 °C; including all gases with a critical temperature ≤ -50 °C.
In China, Hazard Chemical Contents contains compressed gas material up to 140, including perfluorinated - 2 – butane, perfluorinated propane, eight fluorine cyclobutane, eight fluorine isobutylene, allene (stability), the mixture of methyl acetylene and allene, propane and so on.
Definition of Gases under Pressure
Gases under pressure are gases which are contained in a receptacle at a pressure of 200 kPa (gauge) or more at 20 °C, or which are liquefied or liquefied and refrigerated.
Classification of Gases under Pressure
Gases under pressure are classified, according to their physical state when packaged, in one of four groups in the following table:
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Group
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Criteria
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Compressed gas
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A gas which when packaged under pressure is entirely gaseous at -50 °C; including all gases with a critical temperature ≤ -50 °C.
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Liquefied gas
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A gas which when packaged under pressure, is partially liquid at temperatures above -50 °C. A distinction is made between:
(a) High pressure liquefied gas: a gas with a critical temperature between -50°C and +65°C; and
(b) Low pressure liquefied gas: a gas with a critical temperature above +65°C.
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Refrigerated liquefied gas
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A gas which when packaged is made partially liquid because of its low temperature.
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Dissolved gas
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A gas which when packaged under pressure is dissolved in a liquid phase solvent.
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Note: Although compressed gas is classified into four groups, it only has two hazard statement codes:
(1)H280: Contains gas under pressure; may explode if heated, including compressed gas, liquefied gas and dissolved gas;
(2)H281: Contains refrigerated gas; may cause cryogenic burns or injury, including refrigerated liquefied gas.
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