"This document is intended to provide guidance on the design and operation of hydrogen transmission and distribution systems.
The document contains a summary of the current industrial practices and is not intended to be a mandatory standard or code. It is based upon the experience, and practices of members companies from Regional Gas Associations.
The document has been reaffirmed and this revised edition only contains changes to references and no technical changes.
The publication is part of the programme to develop Globally Harmonised publications amongst Regional Gas Associations.
The document is intended for those involved in the design and operation of hydrogen transmission and distribution systems."