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

This European Standard specifies 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.It describes the procedure to be followed when designing (by calculation or by an experimental design method) valve parts subjected to pressure as well as the criteria to be used in the selection of materials.The standard describes methods by which reduced impact values at low temperatures may be taken into account in a safe manner.This standard applies to the design of bodies and bonnets for pressure relief devices, including bursting disc devices, with respect to pressure containment but it does not apply to any other aspects of the design or application of pressure relief devices.