NS EN 12279 : 2000 AMD 1 2005

Foreword
1. Scope
2. Normative references
3. Definitions, symbols and abbreviations
   3.1 General
   3.2 Installation
   3.3 Pressure, design and testing
   3.4 Pressure regulating and safety system
4. Quality assurance
   4.1 General
   4.2 Quality assurance during design, construction,
       operation and maintenance
5. Layout of the gas pressure regulating installation
   5.1 General
   5.2 Location of the gas pressure regulating
       installation
   5.3 Security of the gas pressure regulating
       installation
6. Requirements for housings
   6.1 General
   6.2 Specific requirements for maximum upstream operating
       pressures greater than 5 bar
7. Design of the gas pressure regulating installation
   7.1 General
   7.2 Filtration
   7.3 Noise control
   7.4 Apertures and vent lines
   7.5 Electrical installation
   7.6 Equipotential bonding
   7.7 Corrosion protection
   7.8 Pipework
   7.9 Instrumentation pipework
   7.10 Design pressure
   7.11 Design factor
   7.12 Inlet and outlet valves
8. Pressure regulating and safety system
   8.1 Pressure regulating system
   8.2 Pressure safety systems
   8.3 Bypass
9. Testing
   9.1 General
   9.2 Strength or combined test
   9.3 Tightness test
10. Commissioning
11. Reporting and documentation
12. Operation and maintenance
Annex A (normative) Locations of gas pressure regulating
        installations
Annex B (informative) Bibliography

Contains functional requirement that are relevant for gas pressure regulating installation forming a part of the service lines in gas supply systems. Applicable to the design, construction, materials, testing, operation and maintenance of gas pressure regulating installations which form a part of the service line for the supply of residential, high rise, public access, commercial and mixed use buildings (see EN 1775) and for which the maximum upstream operating pressure is equal to or less than 16 bar and the design flow rate is equal to or less than 200 m[3]/h (normal m[3]/h).