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Fuel
Systems
Equipment Standards
FEDERAL LAW
183.512 - Fuel tanks: Prohibited materials
(c) A fuel tank encased in cellular plastic
or in fiber reinforced plastic must not be constructed
from a ferrous alloy.
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A ferrous alloy is a metal containing the chemical
element iron as one of its major components. Materials such
as black iron, carbon steel, galvanized steel, aluminized
steel, terneplate and stainless steel are all examples of
ferrous alloys.
Cellular plastic (foam) and/or fiber-reinforced
plastic (fiberglass) may not be used to coat or encase ferrous
alloy tanks.
TO COMPLY WITH THE LAW
Is the tank constructed of a ferrous
alloy?
- If YES, it may not be encased in foam
or fiberglass.
- If NO, you may encase it with foam
or fiberglass, so long as you comply with Section
183.552 which requires
that water must not be held or trapped next to the
metallic tank surfaces.
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