I.S. EN ISO 6145-6:2017
Current
The latest, up-to-date edition.
GAS ANALYSIS - PREPARATION OF CALIBRATION GAS MIXTURES USING DYNAMIC METHODS - PART 6: CRITICAL FLOW ORIFICES (ISO 6145-6:2017)
Hardcopy , PDF
English
01-01-2017
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
Dates of withdrawal of national standards are available from NSAI.
National Foreword
European foreword
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Principle
6 Calculation of mass flow rate and volume flow rate
7 Calculation of amount of substance fraction and
volume fraction and associated uncertainty
evaluation
8 Application to the preparation of gas mixtures
9 Calibration and verification
Annex A (informative) - Example of calculation of
isentropic coefficient, viscosity and critical
flow coefficient
Annex B (informative) - Calculation of mass and
volume flow rates under real conditions
Annex C (informative) - Example of flow calculation
for toroidal critical flow orifices under ideal and
real conditions
Annex D (informative) - Calculation of mass flow rate
using flow calibration with pure nitrogen: examples
Bibliography
Important note : Users cannot be edited or removed once added to your Multi user PDF.Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.