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  • BSI
    BS EN ISO 9300:2022 - TC Tracked Changes. Measurement of gas flow by means of critical flow nozzles
    Edition: 2022
    $798.15
    / user per year

Description of BS EN ISO 9300:2022 - TC 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 - TC
TitleTracked Changes. Measurement of gas flow by means of critical flow nozzles
StatusRevision Underway
Publication Date2022-12-01
DescriptorsDesign, Nozzle flowmeters, Error analysis, Reynolds number, Gas flow, Venturi meters, Mathematical calculations, Flow rates, Channel flow, Installation, Flowmeters, Differential-pressure flowmeters, Dimensions, Test equipment, Flow, Flow measurement, Temperature
ICS17.120.10 Flow in closed conduits
CommitteeCPI/30/2
ISBN978 0 539 23463 3
PublisherBSI
Pages296

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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