NEN EN 12284 : 2003

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 List of Symbols
5 General Requirements
6 Materials
7 Design
8 Construction and workmanship
9 Testing
10 Marking and additional information
11 Documentation
Annex A (normative) Procedure for the design of a valve by use of
        a simplified method of calculation
Annex B (normative) Experimental design method for valves
Annex C (normative) Determination of the allowable pressure at
        the maximum operating temperature
Annex D (normative) Determination of the allowable pressure at
        minimum operating temperature (Requirements to avoid
        brittle fracture)
Annex E (informative) Compilation of material characteristics
        of often used materials
Annex F (informative) Justification of the individual methods
Annex ZA (informative) Relationship between this European
         Standard and the Essential Requirements of EU Directive
         97/23/EC
Bibliography

Describes safety requirements, safety factors, test methods, test pressures used and marking of refrigerating valves and other components with similar bodies, hereinafter called valves, for use in refrigerating systems.