BS 4161-3:1989
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Gas meters Specification for diaphragm meters of 6 cubic metres (or 212 cubic feet) per hour rating for working pressures up to 50 mbar
Hardcopy , PDF
15-06-1999
English
30-11-1989
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Foreword
Committees responsible
Section one. General
1. Scope
2. Definitions
3. Meter designation and rating
Section two. General requirements for credit and
prepayment diaphragm meters
4. Materials and finish
5. Design and dimensions
6. Assembly and workmanship
7. Connections
8. Soundness
9. Performance
10. Type tests
11. Transit and storage protection
12. Marking
Section three. Additional requirements for prepayment
meters
13. Visibility
14. Design and dimensions
15. Performance
16. Marking
Appendices
A. Information to be supplied by the purchaser
B. Coated surfaces: test of scratch resistance
C. Decorative finish: test for resistance to humidity
D. Scheme of requirements and associated tests for
corrosion resistance of materials other than
austenitic stainless steel
E. Corrosion resistant surfaces: tests
F. Synthetic diaphragm: Williamson torsion test of
stiffness
G. Synthetic diaphragm porosity test
H. Synthetic diaphragm: preparation and use of treated
gas for the vapour phase test
J. Tests on seals and sealing glands
K. Impact test on assembled meter
L. Method of calculating the resistance power factor
M. Shock test
N. Test for external soundness
P. Test for accuracy of registration
Q. Tests for total mean pressure loss and mechanical
pressure loss
R. Endurance test
S. Ambient temperature tests
T. Test of fire resistance
U. Inclined pressure gauge
Tables
1. Coin dimensions
2. Coinplate setting increments and ranges
Figures
1. Credit and prepayment meters
2. Pressure test nipple
3. Pressure test point positions
4. Meter index (cubic metres)
5. Meter index (cubic feet)
6. Method of testing connections
7. Non-fire-resistant meter badge
8. Hasp for external padlock
9. Internal lock for prepayment meter
10. Paint scratch test apparatus
11. Scheme of requirements and associated tests for
corrosion resistance of materials other than
austenitic stainless steel
12. Torsion apparatus
13. Porosity test rig
14. Diagram of a typical test gas mixer apparatus
15. Impact test apparatus
16. Typical hemispherically-tipped strikers used in
impact test
17. Valve grid
18. Diagrammatic layout of shock test apparatus
19. Bubble leak indicator
20. External soundness test apparatus
21. Schematic diagram of typical fire resistance test
apparatus
22. Inclined pressure gauge: 7.5 mbar range
Construction, performance and marking of credit and prepayment meters.
| Committee |
GSE/25
|
| DevelopmentNote |
BS DRAFT 95/704357 DC REFERS TO AMD
|
| DocumentType |
Standard
|
| Pages |
44
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| BS 2782-1:Method 140E:1982 | Methods of testing plastics. Thermal properties Flammability of a small, inclined test piece exposed to an alcohol flame (laboratory method) |
| BS 4161-2:1967 | Gas meters Meters of plate construction above 1000 cubic feet (28 cubic metres) per hour rating |
| BS 4161-7:1973 | Gas meters Mechanical volume correctors |
| BS 4161-8:1987 | Gas meters Specification for electronic volume correctors |
| BS 4161-4:1970 | Gas meters Plate constructed positive displacement diaphragm meters for a pressure of 350 mbar (5 lbf/in<sup>2</sup>) and up to 170 cubic meters (6000 cubic feet) per hour rating |
| BS 3900-F2:1973 | Methods of test for paint. Durability tests on paint films Determination of resistance to humidity (cyclic condensation) |
| BS 3900-F4:1968 | Methods of test for paints Resistance to continuous salt spray |
| BS 3900-E6:1974 | Methods of test for paints Cross-cut test |
| BS 4161-1:1967 | Gas meters Meters of plate construction up to 1000 cubic feet per hour rating |
| BS 476-8:1972 | Fire tests on building materials and structures Test methods and criteria for the fire resistance of elements of building construction |
| BS 4161-5:1977 | Specification for gas meters Positive displacement diaphragm meters for pressures up to 7 bar |
| BS 5345-1:1976 | Code of practice for the selection, installation and maintenance of electrical apparatus for use in potentially explosive atmospheres (other than mining applications or explosive processing and manufacture) Basic requirements for all Parts of the code |
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