RAM TRUCK 2500 2017 Owner's Manual Supplement page 25

The fuel containers expire and must be removed from
service fifteen years from the date of manufacture. A label
on the CNG tank states the first container inspection date
and container expiration date.
If there is a question about the proper re-inspection of the
CNG fuel container, contact the manufacturer as identified
on the container label.
Container Retest Requirements (Canada)
Each container must be re-qualified by inspection or testing
after a motor vehicle accident and at least every 36 months
or 57,000 km whichever comes first, or at the time of any
reinstallation in accordance with Canadian Standards
Association B51–97, Part 2.
Retest dates must be marked on a label securely affixed to
the container and over-coated with epoxy near the original
test date. Reheat treatment or repair of rejected containers
is not authorized.
The fuel containers expire and must be removed from
service fifteen years from the date of manufacture. A label
on the fuel container states the first container inspection
date and container expiration date.
If there is a question about the proper re-inspection of the
CNG fuel container, contact the manufacturer as identified
on the container label.
MAINTAINING YOUR VEHICLE 23
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