Defence Standard 00-970 PART 1 SECTION 9 - MILITARY SPECIFIC SYSTEMS
9.5.15 Fuel pipes shall not run through:
a. passenger,
b. crew,
c. cargo or
d. baggage compartments,
nor in hazardous proximity to:
e. hot air ducts,
f. electrical wiring and
g. electrically operated equipment contained in bays
unless they are without couplings and adequately
protected against potential sources of ignition and
damage.
Any space between a pipe and its protection shall be adequately vented and drained.
Such protection would involve the use of a design that contains the fuel in the event of leakage from the fuel pipes,however caused, and subsequently vents the fuel into a
suitable drain system.
Typical examples of such a design are double-skinned/walled, jacketed or shrouded.
Whenever lagging is used in compartments in which pipes,tanks or equipment containing flammable fluids are installed, suitable precautions shall be taken to prevent the wetting of the lagging by flammable fluids as a result of normal operation, damage, failures of the equipment or leakages from joints or unions.