PREN ISO 15848-1 : DRAFT 2003
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
INDUSTRIAL VALVES - FUGITIVE EMISSIONS - MEASUREMENT TEST AND QUALIFICATION PROCEDURES - PART 1: CLASSIFICATION SYSTEM AND QUALIFICATION PROCEDURES FOR TYPE TEST OF VALVE ASSEMBLIES
01-01-2006
12-01-2013
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Type test
4.1 Test conditions
4.2 Test procedures
5 Performance classes
5.1 Classification criteria
5.2 Tightness classes
5.3 Endurance classes
5.4 Temperature classes
5.5 Example of class designation
5.6 Marking
6 Reporting
7 Extension of qualification to untested valves
Annex A (normative) Total leak rate measurement
A.1 Vacuum method (helium only)
A.2 Flushing method (helium or methane)
Annex B (normative) Leak measurement using the sniffing method
B.1 Use of helium as test fluid
B.2 Methane as test fluid
Annex C (informative) Derivation and graphs relating the stem
diameter to leak rate
C.1 Stem seal helium leakage rate comparison for fugitive
emission testing in helium
C.2 Stem seal methane leakage rate comparison for fugitive
emission testing in methane
Bibliography
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