ISO/TC 197 Update
Randy Dey, Convenor of ISO/TC 197 WGs 8 and 11
Two ISO/TC 197 working groups, and one task group met in early November in The Hague to advance work items pertaining to electrolyzers for domestic applications and hydrogen refueling stations.
Working Group 8 met on November 6 to advance document ISO/DIS 22734-2.2: Hydrogen generators using water electrolysis process – Part 2: Residential applications. The working group reviewed comments received from circulation of the draft earlier this year and a report from the task group working mainly on improving the test requirement section. The working group is planning to continue efforts to resolve outstanding items in order to finalize a Draft International Standard for circulation. Items under discussion include oxygen venting, hydrogen venting indoors, access panels, leak detection methods and threshold levels.
Working Group 11 met on November 7 to work toward an International Standard for hydrogen refueling stations. The Technical Specification (TS) was approved for publication earlier this year. The WG is continuing its work towards the publication of the international standard. A special effort has been made to get a broader group of stakeholders involved in the development of this international standard.
The WG formed two task groups in June. Task Group 1 is addressing safety distances and hazardous areas. This task group met on November 5 to exchange information on methodolgies developed for determining separation distances. Members of TG1 agreed to define an approach that would allow system designers to account for mitigations such as safety protection systems and interlocks as part of defining necessary separation distances. TG 1 agreed to work by teleconference to develop a new work plan and further develop the approach.
Task Group 2 is addressing dispensing systems. Recent efforts have been on resolving comments raised during the last ballot. Future efforts will include a risk analysis of the dispenser to ensure that necessary safety protections and interlocks are defined. TG 2 will also continue its work by teleconference.
During the meeting on November 7, an additional task force was created by WG 11 to provide input on the comments that have not yet been resolved.
An additional 4 months was provided to complete this work.
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