99/709737 DC : DRAFT JUNE 1999

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

EN 13648-1