APPARATUS FOR DETERMINATION OF CONCENTRATION LIMITS
LFL - Lower Flammable Limit of liquids and gases
UFL - Upper Flammable Limit of liquids and gases
STANDARD REFERENCES:
ASTM E681- Standard test method for concentration limits of flammability of chemicals
ASHRAE 34 - Designation and safety classification of Refrigerants
ISO 817 - Refrigerants - Designation and safety classification
AHRI 700 - Specifications for Refrigerants