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Safety Level of All Popular Use Refrigerant Gases

Views: 10     Author: Site Editor     Publish Time: 2021-01-07      Origin: Site

Safety Level of All Popular Use Refrigerant Gases

Compared with the traditional R22 refrigerant, the flammability of R290 refrigerant is its "bad temper", and it is also a difficult problem we encounter in practical application. According to the relevant standards, the safety level of R290 refrigerant belongs to the A3 category, which means that it is a highly flammable substance. It is a big problem to ensure safety during use.


Following we list the refrigerant safety classification of the common use refrigerant gas types.



Property Index
R290R32R22R410aR134a
Lower Flammable Limitvol%2.113.5NANANA
kg/m30.0380.306NANANA
Autoignition temperature470648635N.D.743
Minimum Ignition EnergymJ0.3130-100NANANA
Burning Velocitycm/s466.7NANANA
Heat of CombustionMJ/kg50.39.42.2-4.44.2
Occupational   Exposure LimitPPMv10001000100010001000
Safety Level  (ASHRAE34)A3A2A1A1A1

Lower Flammable Limit (LFL): refers to the minimum flammable concentration (evenly mixed with air) at 23°C and 101.3kPa.

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