ISO/TC 197 Update


ISO/TC 197 WG10 is meeting April 15-16, 2008, at the U.S. Fuel Cell Council offices in Washington DC to address comments from the vote of ISO/DIS 16111 Transportable gas storage devices—Hydrogen absorbed in reversible metal hydride. Ned Stetson, DOE, is convenor.

The U.S. TAG for ISO/TC 197 will meet Friday, May 30 at CGA in Chantilly, Virginia beginning at 9 AM. The primary purpose for the TAG meeting is to prepare for the ISO/TC 197 meeting in Brisbane, Australia June 13.

The US voted to disapprove New Work Item Proposal (N391) on Road vehicles—Compressed gaseous hydrogen (CGH2) and hydrogen/methane blends fuel system components. It was felt that CSA and SAE should finish their work in this area before proceeding to an international standard. Results of international voting were not known at the time of publication of this report.

ISO 14687:1999/Cor 2:2008 Hydrogen fuel—Product specification—Technical Corrigendum 2 has been published. This corrigendum removed PEM fuel cells for road vehicles from the scope.

Draft Technical Specification 20012, Gaseous hydrogen—Fuelling stations has been approved to be published. You may recall that this item received a significant number of technical comments during ballot. The ISO/TC 197 Chairman indicated that comments that could be resolved easily would be resolved prior to publication of the Technical Specification. The chairman of the US-TAG (Glenn Scheffler) has noted that only about 1/3 of the U.S. comments were addressed as part of the post-ballot adjustments, leaving 48 pages of unresolved comments. Additionally, it is noted that items such as risk-based setback distances and fault management requirements for the dispenser are some of the items that were not yet addressed. It is anticipated that all remaining comments are to be resolved in the Working Group during the development of the Draft International Standard (DIS).

The following are currently out for vote:

• ISO/DIS 15869.3, Gaseous hydrogen and hydrogen blends—Land vehicle fuel tanks. U.S. TAG votes and comments by May 7. Vote concludes May 26.


• ISO/FDIS 22734-1, Hydrogen generators using water electrolysis process—Part 1: Industrial and commercial applications. U.S. TAG votes and comments by May 9. Vote concludes May 28.

Members of the National Hydrogen Association who are interested in reviewing either of these documents in order to provide input for the NHA vote in the US TAG should contact Karen Hall at hallk@hydrogenassociation.org.