NEN EN 13774 : 2013
Current
The latest, up-to-date edition.
VALVES FOR GAS DISTRIBUTION SYSTEMS WITH MAXIMUM OPERATING PRESSURE LESS THAN OR EQUAL TO 16 BAR - PERFORMANCE REQUIREMENTS
12-01-2013
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Requirements and testing
5.1 Type testing
5.2 Materials
5.3 Design
5.4 Dimensions
5.5 Operability and endurance
5.6 Strength of stops
5.7 Resistance of the obturator to static differential
pressure
5.8 Bending resistance
5.9 Shell strength
5.10 External leak tightness
5.11 Internal leak tightness
5.12 Resistance to liquid agents
5.13 Resistance to wear
5.14 Reference flow rate
5.15 Cleanness
5.16 Storage
6 Marking
Annex A (normative) Analysis of the technical file and recording
of the initial conditions
Annex B (normative) Test methods for valves
Annex C (informative) Additional characteristics on request from
the purchaser
Annex D (informative) Resistance to bending moment applied via
the stem or shaft
Annex E (informative) European standards for valves
Bibliography
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