PREN ISO 4126-1 : DRAFT 2009

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Design
6 Production testing
7 Type testing
8 Determination of safety valve performance
9 Sizing of safety valves
10 Marking and sealing
Annex A (informative) - Examples of sizing calculations for
                        various fluids
Annex ZA (informative) - Relationship between this European
                         Standard and the Essential
                         Requirements of EU Directive
                         97/23/EC (PED)

Describes general requirements for safety valves irrespective of the fluid for which they are designed.