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December 11, 2017 3:00 PM, EST
NGVAmerica Releases CNG Fuel System Inspection Guidance
CNG Station Rich Clement/Bloomberg News

NGVAmerica, a national trade association advocating use of natural gas fuel in transportation, released its recommended Compressed Natural Gas Fuel System Inspection Guidance document after two years of discussion and review.

The guidance breaks down suggested CNG fuel system inspection into four tiers: pre-service, cursory, general and detailed.

“This four-tiered approach means that the entire fuel system will be inspected more frequently through cursory reviews,” Dan Bowerson, NGVA director of technology and development, said in a statement.

“Full detailed inspections should be reserved for annual inspection or if cursory reviews uncover signs that a more detailed inspection is needed. Furthermore, this guidance recommends that reviews and inspections expand to cover the entire fuel system and not just the CNG storage system as currently stated in federal law,” he said.

In its statement, the group noted current federal inspection requirements state, “This [CNG] container should be visually inspected after a motor vehicle accident or fire and at least every 36 months or 36,000 miles; whichever comes first, for damage and deterioration.”

Washington-based NGVA has petitioned the Department of Transportation to remove the mileage requirement and change 36 months to 12 months. DOT is moving on NGVA’s petition, but has not yet released a request for public input, according to the group.