NEN EN 1775 : 2007

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
      3.1 Definitions relating to pressures
      3.2 Definitions relating to the gas installation
      3.3 Definitions relating to means of isolation
      3.4 Definitions relating to jointing methods
      3.5 Definitions relating to fittings
      3.6 Definitions relating to tests
      3.7 Definitions relating to commissioning,
            operation and maintenance
      3.8 Definitions relating to assembling process for
            metallic materials
4 Design
      4.1 General
      4.2 Protection in case of fire
      4.3 Elements of pipework
      4.4 Installation
5 Construction
      5.1 Installation
      5.2 Pipework elements and jointing methods
      5.3 Entries through walls and floors
      5.4 Corrosion
      5.5 Means of isolation
      5.6 Regulators and meters
      5.7 Flexible appliance connectors
6 Testing
      6.1 General recommendations
      6.2 Recommendations relating to the safety of persons
            and property during testing
      6.3 Test fluids
      6.4 Test conditions
      6.5 Strength testing
      6.6 Tightness testing
      6.7 Additional tests during the admission of gas
7 Commissioning
      7.1 General
      7.2 Admission of gas
8 Operation and maintenance
      8.1 General
      8.2 Maintenance
      8.3 Abnormal situations
      8.4 Leak detection
      8.5 Work on operating pipework
      8.6 Purging from gas
Annex A (informative) Resistance to high temperatures
A.1 General
A.2 Procedure A
A.3 Procedure B
Annex B (informative) Construction of welded, brazed,
                       soldered joints and polyethylene
                       fusion joints
B.1 General
B.2 Welding of steel
B.3 Brazing and soldering of copper and copper alloys
B.4 Fusion jointing of polyethylene
Bibliography

Describes general recommendations for the design, construction, testing, commissioning, operation and maintenance of installation pipework; pipework between the delivery point of the gas and the inlet connection to the gas appliance.