Standard
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AS 4323.1:2021
[Current]Stationary source emissions, Method 1: Selection of sampling positions and measurement of velocity in stacks
AS 4323.1:2021 specifies a method for the selection of sampling positions for obtaining representative samples of pollutants emitted from stacks (including exhaust ducts and other similar outlets), together with a description of the apparatus, procedures and calculations used to measure gas velocity and flowrate.
Published: 24/09/2021
Pages: 38
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope
2 Normative references
3 Terms and definitions
4 Sampling plane selection
4.1 Location
4.2 Ideal, non-ideal and non-conforming sampling planes
4.2.1 General
4.2.2 Ideal sampling plane
4.2.3 Non-ideal sampling plane
4.2.4 Non-conforming sampling plane
5 Number and location of sampling points
5.1 General
5.2 Number of sampling points
5.3 Location of sampling points
5.3.1 General
5.3.2 Circular sampling planes
5.3.3 Rectangular sampling planes
6 Sampling access holes
7 Work platform requirements
7.1 Work platform
7.2 Access to platform
7.3 Services
8 Measurement of velocity and volume flowrate
8.1 General
8.2 Apparatus
8.2.1 General
8.2.2 Type L pitot tube
8.2.3 Type S pitot tube
8.2.4 Ancillary equipment
8.3 Pitot tube calibration factor
8.4 Test procedure
9 Calculations
10 Measurement uncertainty
11 Test report
Appendix A
A.1 Scope
A.2 Temporary test sections
A.2.1 General
A.2.2 Vertical test sections
A.2.3 Horizontal test sections
Appendix B
B.1 Non-ideal sampling plane
B.2 Number of sampling points
B.3 Access holes
Appendix C
C.1 Scope
C.2 Procedure
C.2.1 General
C.2.2 Traverse points
C.2.3 Method
C.2.4 Equipment calibration
C.2.5 Reporting
C.3 Calculations and data analysis
Appendix D
D.1 Sampling planes
D.2 Stratification testing
Appendix E
E.1 Scope
E.2 Calibration flow system
E.3 Calibration procedure
E.4 Special considerations
Bibliography
Cited references in this standard
[Current]
Fixed platforms, walkways, stairways and ladders — Design, construction and installation
[Current]
General requirements for the competence of testing and calibration laboratories
[Current]
Measurement of fluid flow in closed conduits — Velocity area method using Pitot static tubes
[Pending Revision]
Industrial fall-arrest systems and devices, Part 2: Horizontal lifeline and rail systems
[Current]
Industrial fall-arrest systems and devices, Part 4: Selection, use and maintenance
Content history
[Available Superseded]
[Superseded]
DR AS 4323.1:2020
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