Foreword

1 Scope

2 Normative references

3 Terms, symbols, units and abbreviations

3.1 Hydrogen

3.2 Hydrogenated natural gas

3.3 Hydrogen injection plant

3.4 Grid connection

3.5 Service point

3.6 Experts

3.7 Competent persons

3.8 Persons qualified for testing protections against electrical hazards

3.9 Persons qualified for explosion protection testing

4 General requirements

4.1 Coordination and definition of interfaces

4.2 Requirements on the properties of hydrogen for injection into gas supply grids

4.3 Hydrogen injection requirements for injection into gas supply grids in respect of grid gas properties

4.4 Hydrogen injection plant – manufacture

4.5 Plant overview at the installation site

4.6 Explosion protection

5 Plant interfaces

6 Material selection

7 Requirements on hydrogen injection plants

7.1 General

7.2 Monitoring of ambient atmosphere

7.3 Metrological requirements

8 Requirements on buried pipelines

8.1 General requirements

9 Testing and commissioning

10 Operation

Annex A (informative): Gas metering and gas billing: Recommendations for handling hydrogen and hydrogenated natural gases

Bibliography