BS EN 1643:2014

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
        test- 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 Directive 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 gas burners and gas
        burning Appliances
Annex J (normative) - Method for the determination
        of a Safety Integrity Level (SIL)
Annex K (normative) - Method for the determination
        of a Performance Level (PL)
Annex L (informative) - Relationship between
        Safety Integrity Level (SIL) and
        Performance Level (PL)
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.

This European Standard specifies safety, constructional and performance requirements of valve-proving systems, hereafter referred to as VPS, intended for use with gas burners and gas-burning appliances. It also describes the test procedures for checking compliance with these requirements and provides information necessary for the purchaser and user.

This European Standard applies to all types of VPS which are used for the automatic detection of leakage in a gas burner section having at least two valves designed in accordance with EN 161 and which give a signal if the leakage of one of the valves exceeds the detection limit.

This European Standard applies to VPSs with a maximum working pressure up to and including 500 kPa for use in systems using fuel gases of the 1^st, 2^nd or 3^rd families.

This European Standard does not apply to VPSs for use in explosive atmospheres.

This European Standard is applicable to AC and DC supplied VPS (for VPS supplied by stand-alone battery system, battery systems for mobile applications or systems which are intended to be connected to DC supply networks VPS see Annex I).

Provisions for production control are not part of this European Standard.