NEN EN 12186 : 2014

Foreword
1 Scope
2 Normative references
3 Definitions, symbols and abbreviations
      3.1 General
      3.2 Station
      3.3 Pressure, design and testing
      3.4 Pressure control
4 Quality system
5 Layout of the gas pressure regulating station
      5.1 General
      5.2 Layout of the site
      5.3 Site security
6 Housings
      6.1 General
      6.2 Requirements for housings
      6.3 Underground stations
7 Design of the station
      7.1 General
      7.2 Gas pre-heating
      7.3 Filters, separators, scrubbers
      7.4 Noise control
      7.5 Apertures and vent lines
      7.6 Electrical installation
      7.7 Lighting and earthing
      7.8 Cathodic protection and electrical isolation
      7.9 Ancillaries
      7.10 Pipework
      7.11 Welding
      7.12 Instrumentation pipework
      7.13 Stress analysis
      7.14 Isolating valves
8 Pressure control
      8.1 General
      8.2 Pressure regulating system
      8.3 Pressure safety system
      8.4 Non-venting pressure safety devices
      8.5 Venting pressure safety devices
      8.6 Pressure warning system
      8.7 Instrumentation
      7.7 Bypasses
9 Testing
      9.1 General
      9.2 Strength test
      9.3 Tightness test
      9.4 Reporting
10 Commissioning
11 Operation and maintenance
      11.1 General
      11.2 Data
      11.3 Maintenance
      11.4 Training
      11.5 Work undertaken
      11.6 Firefighting
Annex A (informative) Bibliography

Covers the relevant functional requirements for gas pressure regulating stations, which form part of gas transmission or distribution systems. Pertains to the design, materials, construction, testing, operation and maintenance of gas pressure regulating stations.