PREN 1643 : DRAFT 2012

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Units of measurement and test conditions
6 Construction requirements
7 Performance
8 EMC/Electrical requirements
9 Marking, installation and operating instructions
Annex A (informative) - Gas connections in common
        use in the various countries
Annex B (informative) - Leak-tightness test -
        Volumetric method
Annex C (informative) - Leak-tightness - Pressure
        loss method
Annex D (normative) - Conversion of pressure loss
        into leakage rate
Annex E (normative) - Electrical/electronic component
        fault modes
Annex F (normative) - Additional requirements for safety
        accessories and pressure accessories as
        defined in EU 97/23/EC
Annex G (normative) - Materials for pressurized parts
Annex H (informative) - Additional materials for pressurized
        parts
Annex I (normative) - Requirements for controls used in
        DC supplied fuel burners and fuel burning
        appliances
Annex AA (informative) - Application Guidance
Annex ZA (informative) - Relationship between this European
         Standard and the Essential Requirements of
         EU Directive 2009/142/EC relating to
         appliances burning gaseous fuels
Bibliography

Defines safety, constructional and performance requirements of valve-proving systems, hereafter referred to as VPS, intended for use with gas burners and gas-burning appliances.