99/709737 DC : DRAFT JUNE 1999
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
07-03-2002
11-23-2012
Foreword
1 Scope
2 Normative references
3 Definitions and symbols
4 Requirements
4.1 General
4.2 Design
4.2.1 Design temperature
4.2.2 Drainage
4.2.3 Stem guiding
4.2.4 Inserts 5
4.2.5 Sublimating cryogens
4.3 Materials
4.3.1 Metallic materials
4.3.2 Corrosion resistance
4.3.3 Oxygen compatibility
4.3.4 Acetylene compatibility
4.3.5 Non-metallic materials
5 Testing
5.1 Production testing
5.2 Sample valve test
5.2.1 Operating and flow characteristics test
5.2.2 Test of the repeatability of leak tightness at
re-seat
5.2.3 Cryogenic tests
6 Determination of the certified derated coefficient of
discharge (K[dr])
7 Cleanliness
8 Marking
9 Sealing
Annex ZA (informative) Clauses of this European Standard
addressing essential requirements or other
provisions of EU directives
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