ISO 9300:2005 specifies the geometry and method of use (installation in a system and operating conditions) of critical flow Venturi nozzles (CFVN) used to determine the mass flow-rate of a gas flowing through a system. It also gives the information necessary for calculating the flow-rate and its associated uncertainty. It is applicable to Venturi nozzles in which the gas flow accelerates to the critical velocity at the throat (this being equal to the local sonic velocity), and only where there is steady flow of single-phase gases.
WITHDRAWN
EN ISO 9300:1995
WITHDRAWN
EN ISO 9300:2005
99.60
Withdrawal effective
Jun 29, 2022
PUBLISHED
EN ISO 9300:2022