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Fuel
Systems
Equipment Standards
FEDERAL LAW
183.540 - Hoses: Standards and markings
(a) “USCG Type A1” hose means
hose that meets the performance requirements of:
(1) SAE Standard J1527 DEC85, Class
1 and the fire test in Sec.183.590;
or
(2) Underwriters’ Laboratories, Inc. (UL) Standard
1114.
(b) “USCG Type A2” hose means
hose that meets the performance requirements of SAE
Standard J1527 DEC85, Class 2 and the fire test in Sec
183.590;
(c) “USCG Type B1” hose means
hose that meets the performance requirements of SAE
Standard J1527 DEC85, Class 1.
(d) “USCG Type B2” hose means hose that
meets the performance requirements of SAE Standard J1527
DEC85 Class 2.
NOTE:
SAE Class 1 hose has
a permeation rating of 100 grams or less fuel loss per
square meter of interior surface in 24 hours.
SAE Class 2 hose has a permeation
rating of 300 grams or less fuel loss per square meter
of interior surface in 24 hours.
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The permeation rating of the hose refers to
the quantity of fuel which will pass through the walls of
the hose out into the boat when the hose is filled with fuel.
You could think of this as a slow leak. Fortunately, the fuel
vapors formed by this low level of permeation are readily
dissipated by the ventilation system.
You may use USCG Type A1 hose for any application.
In some cases, you may find the difference in price between
A1, A2, B1, and B2 does not justify stocking all four types.
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