Cold and Hard Facts Refrigerants Q & A- June 15, 2023

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A: A3 Refrigerants (e.g., propane) have high flame speeds and HOC

A3 refrigerants are classified as highly flammable refrigerants, which means they have a higher risk of fire or explosion than A2L or A2 refrigerants. They have a flame propagation speed of greater than 10 cm/s and a heat of combustion of greater than 19 MJ/kg. Examples of A3 refrigerants include propane and propylene.

Due to their high flammability, A3 refrigerants require special precautions and safety measures when handling, storing, and using them in refrigeration systems. These safety measures may include explosion-proof equipment, ventilation, and training on safe handling procedures.

In some cases, A3 refrigerants may not be suitable for use in certain types of refrigeration systems or applications where the risk of fire or explosion is particularly high. It's important to carefully consider the safety risks associated with A3 refrigerants and to ensure that appropriate safety measures are in place before using them in any refrigeration system.

Overall, the classification of refrigerants based on their safety properties is an important consideration when selecting and using refrigerants in any application. It helps ensure that appropriate safety measures are in place to protect people and property from potential risks associated with refrigerants.


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