Fuel Tank build

[Scott]

I'm not sure I understand ....

Bobby .... feel like we are ganging up on ya with the questions... but the pressure testing ... is 1 "lb" (psi I assume) appropriate ?? I ask only because of what the Federal Regulation states (or at least how I read it) ....plus I know the tank builders around here all mention and build to the CG/Federal standards and they typically test to 5 psi …even mentioned on their websites

Does the 1 psi pressure test fit within the Federal requirements ? Is the caveat in #2 below ?

Maybe I don’t understand the methods of testing or the numbers being thrown around here….or maybe it has to do with the malleability of Aluminum vs Stainless?


Quote from Boatbuilder handbook
Title 33 CFR, Sections 183.501–183.590
FUEL SYSTEMS
Revised November, 2003

“FEDERAL LAW:
183.542 Fuel systems.
(a) Each fuel system in a boat must have been tested by the boat
manufacturer and not leak when subjected to the greater of the
following pressures:
(1) Three pounds per square inch; or
(2) One and one-half times the pressure created in the lowest part of the
fuel system when it is filled to the level of overflow with fuel.
(b) The test pressure shall be obtained with air or inert gas.”