BS ISO 23551-5:2014

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Classes of control
5 Test conditions
6 Construction
7 Performance
8 EMC/Electrical requirements
9 Marking, installation and operating instructions
Annex A (informative) - Leak-tightness test -
        Volumetric method
Annex B (informative) - Leak-tightness test -
        Pressure-loss method
Annex C (normative) - Conversion of pressure
        loss into leakage rate
Annex D (normative) - Test for immunity to
        power-frequency magnetic fields
Annex E (normative) - Specific regional requirements
        in European countries
Annex F (normative) - Specific regional requirements
        in Canada and USA
Annex G (normative) - Specific regional requirements
        in Japan
Annex AA (informative) - Examples of manual gas
         shut-off valves
Bibliography

Defines safety, constructional and performance requirements for manual gas valves intended for use with gas burners and gas-burning appliances, hereafter referred to as 'valves', unless otherwise specified.

This part of ISO23551 specifies safety, constructional and performance requirements for manual gas valves intended for use with gas burners and gas-burning appliances, hereafter referred to as ‘valves’, unless otherwise specified.

This International Standard applies to following types of manual gas valves:

• manual gas shut-off valve;

• gas burner valve;

• appliance connector valve;

• “delta C?? valve.

This part of ISO23551 applies to valves for gas burners and gas-burning appliances of nominal connection size up to and including DN 100 that can be used and tested independently of these appliances using fuel gases, as natural gas, manufactured gas or liquefied petroleum gas (LPG) at inlet pressures up to and including 500kPa. It is not applicable to corrosive and waste gases.

This International Standard covers type testing only.