August 2004
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Mixed Results for International Standards for Hydrogen Tanks
by Karen Hall
Vice President, Technical Operations of the
National Hydrogen Association

ISO TC 197 has reported the results of voting on ISO/DIS 15869 Gaseous hydrogen and hydrogen blends —Land vehicle fuel tanks. This is a five-part standard, with each part voted separately. The results of the voting are shown below:

Document Results of Voting
ISO/DIS 15869-1 Gaseous hydrogen and hydrogen blends —Land vehicle fuel tanks — Part 1: General requirements P-Members voting: 9 in favor out of 13 = 69.23% (requirement >= 66.66%)
(P-Members having abstained are not counted in this vote.)
Member bodies voting: 5 negative votes out of 14 = 35.71% (requirement <= 25%)
Disapproved
ISO/DIS 15869-2 Gaseous hydrogen and hydrogen blends — Land vehicle fuel tanks — Part 2: Particular requirements for metal tanks P-Members voting: 10 in favor out of 12 = 83.33% (requirement >= 66.66%)
(P-Members having abstained are not counted in this vote.)
Member bodies voting: 3 negative votes out of 13 = 23.07% (requirement <= 25%)
Approved
ISO/DIS 15869-3 Gaseous hydrogen and hydrogen blends — Land vehicle fuel tanks — Part 3: Particular requirements for hoop wrapped composite tanks with a metal liner P-Members voting: 10 in favor out of 12 = 83.33% (requirement >= 66.66%)
(P-Members having abstained are not counted in this vote.)
Member bodies voting: 3 negative votes out of 13 = 23.07% (requirement <= 25%)
Approved
ISO/DIS 15869-4 Gaseous hydrogen and hydrogen blends — Land vehicle fuel tanks — Part 4: Particular requirements for fully wrapped composite tanks with a metal liner P-Members voting: 10 in favor out of 12 = 83.33% (requirement >= 66.66%)
(P-Members having abstained are not counted in this vote.)
Member bodies voting: 3 negative votes out of 13 = 23.07% (requirement <= 25%)
Approved
ISO/DIS 15869-5 Gaseous hydrogen and hydrogen blends — Land vehicle fuel tanks — Part 5: Particular requirements for fully wrapped composite tanks with a non-metallic liner P-Members voting: 9 in favor out of 12 = 75% (requirement >= 66.66%)
(P-Members having abstained are not counted in this vote.)
Member bodies voting: 4 negative votes out of 13 = 30.76% (requirement <= 25%)
Disapproved

The comments received by all member countries for all five parts will be returned to the joint ISO/TC 197, ISO/TC 58 SC3 and ISO/TC 22 working group for its consideration.