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  • BSI
    BS EN ISO 9300:2022 Measurement of gas flow by means of critical flow nozzles
    Edition: 2022
    $569.57
    / user per year

Description of BS EN ISO 9300:2022 2022

This document specifies the geometry and method of use (installation in a system and operating conditions) of critical flow nozzles (CFNs) used to determine the mass flow rate of a gas flowing through a system basically without the need to calibrate the CFN. It also gives the information necessary for calculating the flow rate and its associated uncertainty. This document is applicable to nozzles in which the gas flow accelerates to the critical velocity at the minimum flowing section, and only where there is steady flow of single-phase gas. When the critical velocity is attained in the nozzle, the mass flow rate of the gas flowing through the nozzle is the maximum possible for the existing inlet condition, while the CFN can only be used within specified limits, e.g. the CFN throat to inlet diameter ratio and Reynolds number. This document deals with the toroidal- and cylindrical-throat CFNs for which direct calibration experiments have been made in sufficient number to enable the resulting coefficients to be used with certain predictable limits of uncertainty.

Standard NumberBS EN ISO 9300:2022
TitleMeasurement of gas flow by means of critical flow nozzles
StatusRevision Underway
Publication Date2022-08-20
ReplacesBS EN ISO 9300:2005
Identical National Standard OfEN ISO 9300, ISO 9300
DescriptorsReynolds number, Flow measurement, Differential-pressure flowmeters, Venturi meters, Temperature, Design, Nozzle flowmeters, Flow, Error analysis, Channel flow, Flowmeters, Gas flow, Installation, Dimensions, Flow rates, Test equipment, Mathematical calculations
ICS17.120.10 Flow in closed conduits
CommitteeCPI/30/2
ISBN978 0 539 13213 7
PublisherBSI
Pages132

The following editions for this book are also available...

Format Year Publisher Type Title Annual Price
2022
BSI
Standards
 $798.15 Buy

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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