Standard
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AS 4747.2:2025
[Current]Metering systems for non-urban water supply, Part 2: Technical requirements for closed conduit meters fully charged
AS 4747.2:2025 sets out the technical requirements for non-urban metering systems in closed conduit, fully charged applications.
Published: 27/06/2025
Pages: 30
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Introduction
1 Scope and general
1.1 Scope
1.2 Normative references
1.3 Terms and definitions
1.4 Symbols and abbreviated terms
1.5 Evaluation of product conformity
2 Materials
2.1 General
2.2 Resistance to corrosion
2.2.1 General
2.2.2 Corrosion-resistant materials
2.3 Material durability tests
2.3.1 Ultraviolet exposure test
2.3.2 Polymer-bodied durability test
3 Design
3.1 Dimensions and connections
3.1.1 Dimensions
3.1.2 Threaded end connections
3.1.3 Flanged end connections
3.1.4 Other end connections
3.1.5 Other connections
3.2 Output
3.2.1 General
3.2.2 Flow rate
3.2.3 Volume
3.2.4 Other data output
3.3 Electronic data storage
3.4 Sampling rate
3.5 Frost protection
3.6 Bypass
3.7 Torque resistance of threaded end connections
4 Performance requirements
4.1 General
4.2 Rated operating conditions
4.3 Measurement of performance
4.3.1 General
4.3.2 Direct volumetric comparison
5 Product documentation
Appendix A
Appendix B
B.1 General
B.2 Nature of errors
B.3 Worked example of an uncertainty calculation
B.3.1 Introduction
B.3.2 Example
B.3.3 Step 1: Calculate the water velocity through the pipe
B.3.4 Step 2: Calculate the standard uncertainty of velocity measurement
B.3.5 Step 3: Calculate standard uncertainty on pipe area
B.3.6 Step 4: Calculate combined standard uncertainty
Appendix C
C.1 Scope
C.2 Testing sequence
C.3 Initial static pressure and baseline accuracy tests
C.3.1 Initial static pressure
C.3.2 Initial baseline accuracy
C.4 Cyclic temperature test
C.4.1 General
C.4.2 Apparatus and testing conditions
C.4.3 Procedure
C.5 Interim assessment
C.6 Cyclic pressure test
C.6.1 General
C.6.2 Apparatus
C.6.3 Procedure
C.6.3.1 Test cycle
C.6.3.2 Test procedure
C.7 Final accuracy test
C.8 Comparison of results
C.9 Acceptance criteria
C.10 Test report
Bibliography
Cited references in this standard
Content history
[Superseded]
[Superseded]
[Superseded]
DR AS 4747.2:2024