BS 4161-5:1990
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Gas meters Specification for diaphragm meters for working pressures up to 7 bar
Hardcopy , PDF
15-06-1999
English
31-10-1990
Foreword
Committees responsible
Specification
Section one. General
1. Scope
2. Definitions
3. Meter designation and rating
Section two. General requirements
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
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 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. Meter designations and ratings
2. Internal leakage test rates
3. Total mean pressure loss and mechanical pressure loss
4. Strength of connections
Figures
1. Diagrammatic illustration of meter showing
connections and index with tabulated connection and
case dimensions
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. Paint scratch test apparatus
9. Scheme of requirements and associated tests for
corrosion resistance of materials other than
austenitic stainless steel
10. Torsion apparatus
11. Porosity test rig
12. Diagram of a typical test gas mixer apparatus
13. Impact test apparatus
14. Typical hemispherically-tipped strikers used in
impact test
15. Valve grid (diagrammatic only)
16. Diagrammatic layout of shock test apparatus
17. Bubble leak indicator
18. External leakage test apparatus
19. Schematic diagram of typical fire resistance test
apparatus
20 Inclined pressure gauge: 7.5 mbar range
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