Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviations
5 Type test
  5.1 Test conditions
  5.2 Test procedures
6 Performances classes
  6.1 Classification criteria
  6.2 Tightness classes
  6.3 Endurance classes
  6.4 Temperature classes
  6.5 Examples of class designation
  6.6 Marking
7 Reporting
8 Extension of qualification to untested valves
Annex A (normative) Total leak rate measurement
Annex B (normative) Leak measurement using the sniffing
        method
Annex C (informative) Derivation and graphs relating the
        stem diameter to leak rate
Bibliography