I.S. EN 88:1992
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
PRESSURE GOVERNORS FOR GAS APPLIANCES FOR INLET PRESSURES UP TO 200 MBAR
Hardcopy , PDF
21-12-2007
English
01-01-1992
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.
Cooperating organizations
National foreword
Foreword
1. General
1.1 Object and field of application
1.2 References
1.3 Definitions
1.4 Classification
1.5 Measuring ratio
2. Construction requirements
2.1 General
2.2 Materials
2.3 Connections
2.4 Seals for glands for moving parts
2.5 Pressure test nipples
3. Performance requirements
3.1 General
3.2 Putting the governor out of action
3.3 External leak-tightness
3.4 Torsion and bending
3.5 Durability
3.6 Governor performance
3.7 text deleted
3.8 Durability of performance
3.9 Lock-up pressure
4. Test methods
4.1 General
4.2 Putting the governor out of action
4.3 External leak-tightness
4.4 Torsion and bending
4.5 Durability
4.6 Governor performance
4.7 text deleted
4.8 Durability of performance
4.9 Lock-up pressure
5. Marking, installation and operating instructions
5.1 Marking
5.2 Installation, operating and servicing instructions
5.3 Warning notice
Annexes
A. Characteristics of combustible gases
B. Typical governors and governor parts
C. Use of ISO 7-1: 1982 and ISO 228-1: 1982 threads
for gas connections
D. Leak-tightness test - volumetric method
E. Leak-tightness test - pressure loss method
F. Conversion of pressure loss into leakage rate
G. Summary of requirements and test conditions
Tables
1. Connection sizes
2. Maximum external leakage rates
3. Torque and bending moment
4. Gas pressure at inlet to the governor
5. Outlet pressure variation from the outlet setting
pressure
6. Sequence of testing
7. Tightening torque for flange bolts to ISO 7005-2:
1988
Figures
1. Arrangement for torsion test
2. Arrangement for bending test
3. Paint scratch test apparatus
4. Governor performance test rig
5. Graph of performance using inlet pressure variation
6. Graph of performance using flow rate variation
7. Types of constant pressure governor (diagrammatic)
8. Apparatus for testing leak-tightness (volumetric
method)
9. Apparatus for testing leak-tightness (pressure loss
method)
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