PRICES include / exclude VAT
Sponsored link
immediate downloadReleased: 2022-08-20
BS EN ISO 9300:2022 Measurement of gas flow by means of critical flow nozzles

BS EN ISO 9300:2022

Measurement of gas flow by means of critical flow nozzles

Format
Availability
Price and currency
English Secure PDF
Immediate download
486.20 USD
English Hardcopy
In stock
486.20 USD
Standard number:BS EN ISO 9300:2022
Pages:132
Released:2022-08-20
ISBN:978 0 539 13213 7
Status:Standard
DESCRIPTION

BS EN ISO 9300:2022


This standard BS EN ISO 9300:2022 Measurement of gas flow by means of critical flow nozzles is classified in these ICS categories:
  • 17.120.10 Flow in closed conduits
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.