ISO-9300 › Historical Revision Information
Measurement of Gas Flow by Means of Critical Flow Venturi Nozzles

ISO-9300 - 2ND EDITION - SUPERSEDED
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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.

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17.120.10 (Flow in closed conduits Gas meters in buildings, see 91.140.40 Water meters in buildings, see 91.140.60)

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Document Number

ISO 9300:2005

Revision Level

2ND EDITION

Status

Superseded

Publication Date

Aug. 15, 2005

Committee Number

ISO/TC 30/SC 2