NGV2/HGV2 Update
Julie Cairns, CSA America, Inc.


The NGV2/HGV2 TAG met by teleconference on June 28 and July 26.

Highlights of note include:

• Revisions to NGV2 (Natural Gas Vehicle (NGV) Fuel Containers) were recommended to the Automotive Technical Committee for inclusion in the NGV2 standard (Natural Gas Vehicle (NGV) Fuel Containers) at its March 29-31, 2004 meeting and the March 8 and 10, 2005 Teleconference Meetings. Revisions include:
  
  
• revised to make terminology and units consistent with international and industry standards
  
  
• revised to clarify language and test requirements
  
  
  
• Revisions to NGV2 (Natural Gas Vehicle (NGV) Fuel Containers) have been adopted by the TAG for distribution for public review and comment. The review and comment will include revisions adopted at the March 29-31, 2004 meeting and the March 8 and 10, June 28 and July 26, 2005 Teleconference Meetings.
  
  
• revised cycle life requirements: minimum 10 years/maximum 25 years
  
  
• using ratios, rather than percentages, throughout the document
  
  
  
• Draft HGV2 (Hydrogen Gas Vehicle Fuel Conatiners)
• Life Cycle Working Group working with OEMs and tank manufacturers on life cycles for hydrogen tanks. The working group is reviewing draft ISO requirements.
  
  
• TAG reviewing draft for consistentency with international terminology and units, and clarity of language
  
  
• TAG working with ASME Hydrogen Steering Committee on issues of possible hydrogen embrittlement
  
  
• TAG working to ensure technical consistency throughout the document and documenting rationale