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CNG Vehicle Fuel Container Standards
All CNG vehicle fuel containers MUST meet the federal government’s
Federal Motor Vehicle Safety Standard (FMVSS) 304 (49 CFR
571.304), Compressed Natural Gas Fuel Container Integrity.
All CNG vehicle fuel containers SHOULD meet American National
Standards Institute (ANSI)/Canadian Standards Association
(CSA) NGV2, Basic Requirements for Compressed Natural Gas
Vehicle Fuel Containers. This industry standard is more comprehensive
and up-to-date than FMVSS 304.
Label Requirements (S7.4, FMVSS 304)
“Each CNG fuel container shall be permanently labeled
with the information specified in paragraphs (a) through (h)
of this section.” ….“(g) The statement:
‘This 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.’”
Periodic In-Service Inspection Requirements (Sec.
4.1.4, NGV2)
“Each container shall be visually inspected at least
every 36 months, or at the time of any re-installation, for
external damage and deterioration….The inspection shall
be performed by a qualified container inspector in accordance
with (1) the manufacturer’s recommendations and (2)
the inspection procedures provided in Compressed Gas Association
(CGA) pamphlet C-6.4”
Document Availability
CGA Pamphlet C-6.4, Methods for External Visual Inspection
of NGV Fuel Containers and their Installations is a 30-page
document that provides detailed inspection requiremnents and
guidance. It is available for purchase from CGA at 703-788-2700
or visit [here]
ANSI/CSA NGV2 and other related documents may be purchased
from the CSA at 800-463-6727 or by visiting [here]
or contact [ANSI]
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