10.1.1 Fluid systems should be constructed and
arranged so as to assure a safe and adequate flow of fluid at a prescribed
flow rate and pressure under all conditions of craft operation. The
probability of a failure or a leakage in any one fluid system causing
damage to the electrical system, a fire or an explosion hazard should
be extremely remote footnote. Attention should be
directed to the avoidance of fuel impingement on hot surfaces in the
event of leakage or fracture of the pipe.
10.1.2 The Administration should consider the
need to provide redundancy in pumping and piping systems in single
engine craft.
10.1.3 The maximum allowable working pressure
in any part of the fluid system should not be greater than the design
pressure acceptable to the Administration, having regard to the allowable
stresses in the materials. Where the maximum allowable working pressure
of a system component, such as a valve or a fitting, is less than
that computed for the pipe or tubing, the system pressure should be
limited to the lowest of the component maximum allowable working pressures.
Every system which may be exposed to pressures higher than the system's
maximum allowable working pressure should be safeguarded by appropriate
relief devices.
10.1.4 Tanks and piping should be pressure tested,
as required by the Administration, to a pressure that will assure
a safety margin in excess of the working pressure of the item. The
test on any storage tank or reservoir should take into account any
possible static head in the overflow condition and the dynamic forces
arising from craft motions.
10.1.5 Materials used in piping systems should
be compatible with the fluid conveyed and due regard given to the
risk of fire. Non-metallic piping material may be permitted in certain
systems at the discretion of the Administration provided precautions
are taken to maintain the integrity of the hull and watertight decks
and bulkheads where necessary. Concerning materials and the use of
flexible hoses in flammable fluid systems, reference is made to the
fire safety requirements in 7.3.4 and 7.3.5.