Ram Trucks 2013 3500 - CNG Supplement - Manual (Page 56)

MAINTENANCE PROCEDURES
Container Inspection And Testing
Inspection
It is recommended that the fuel system components be
inspected periodically for leaks and/or excessive wear.
Container Retest Requirements (United States)
Each CNG fuel container must 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, in accordance with the Federal Motor Vehicle
Safety Standard number 304 compressed natural gas fuel
containers.
The inspection shall be performed only by a qualified
person in accordance with the container manufacturers
established re-inspection criteria and the appropriate
Compressed Gas Association, Inc. guideline. Retest dates
must be marked on a label securely affixed to the
container and overcoated 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 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 identi-
fied on the container label.
54 MAINTAINING YOUR VEHICLE