Classification of Refrigerants According to Safety

Classification of Refrigerants According to Safety Points : classification of refrigerants according to safety Refrigerants have been classified by two different national organizations. They are: the National Refrigeration Safety Code. U.S.A. and The National Board of Fire Underwriters, U.S.A.. The National Refrigeration Safety Code, U.S.A. catalogues all the refrigerants into three groups. Some of these are: Group One — (Safest of the Refrigerants) R-113, R-11, R-21, R-114. R-12. R-30, R-22, R-744, R-502, R-13, R-14, R-500, R-134a. Group Two — (Toxic and somewhat (inflammable Refrigerants) R-1130, R-611, R-160, R-764, R-40, R-717 Group Three — (inflammable Refrigerants) R-600, R-601, R-290, R-170, R1150, R-50.