This standard applies to laboratory and field liquid flow measurement for testing heating@ ventilating@ air-conditioning@ and refrigerating systems and components. This standard is restricted to applications where the entire flow stream of liquid enters and exits the liquid flowmeter in a liquid-only state during data recording with the following exception: a. This standard does not apply to liquid-phase refrigerant mass flow measurements where the liquid flow includes circulating lubricant. Those measurements are within the scope of ASHRAE Standard 41.10. This standard prescribes methods for liquid flow measurement.