G 221 (M)
Guideline for the Application of the DVGW Codes of Practice to the Pipline Bound Supply of the General Public with Hydrogen-containing Fuel Gases and Hydrogen
Leitfaden zur Anwendung des DVGW-Regelwerks auf die leitungsgebundene Versorgung der Allgemeinheit mit wasserstoffhaltigen Gasen und Wasserstoff
Brief description
This Code of Practice is an overarching regulatory document for gas infrastructure operated with hydrogen-containing methane-rich gases (2nd gas family) or hydrogen (5th gas family). It supplements the existing DVGW technical regulations with the aim of being able to continue operating existing gas infrastructures largely with the established technologies and protective measures and offers transitional solutions for the construction of new gas infrastructures as well as the conversion and operation of existing gas infrastructures with hydrogen. In addition, the Code of Practice ensures the short-term applicability of the DVGW regulations to hydrogen networks that fall under the legal framework of the Energy Industry Act (EnWG) and is to be applied together with the existing DVGW regulations. It supplements the individual subject-specific regulatory documents where the requirements contained therein do not yet cover the particular hazards posed by hydrogen-containing methane-rich gases (2nd gas family) or hydrogen (5th gas family). DVGW regulations that include the hydrogen-specific hazards in their scope of application take precedence over the application of this Code of Practice. This Code of Practice provides supplementary information and recommendations for the planning, manufacture, construction, testing, commissioning, conversion and operation of energy systems that are operated to supply the general public with hydrogen-containing methane-rich gases (2nd gas family) or hydrogen (5th gas family) in accordance with DVGW Code of Practice G 260. The Code of Practice can also be applied mutatis mutandis to gas infrastructures that are operated with gases whose gas compositions and properties deviate from the limits permitted by DVGW Code of Practice G 260.
