once in each compartment. Various other information
is also applied to the lines.
In most instances, lines are marked by the use of
tape or decals. On lines 4 inches and larger in diameter,
steel tags may be used in place of tape or decals. On
lines in engine compartments, where there is a
possibility of tapes, decals, or tags being drawn into the
engine intake, paint is usually used.
Identification tape codes indicate the function,
contents, hazards, direction of flow, and pressure in the
fluid line. These tapes are applied according to
MIL-STD-1247. This Military Standard was issued to
standardize fluid line identification throughout the
Department of Defense. Figure 12-13 shows the
application of these tapes as specified by this standard.
The function of a line is identified by the use of a
tape. The tape is approximately 1-inch wide, where
words, colors, and geometric symbols are printed.
Functional identification markings, as shown in
MIL-STD-1247, are the subject of international
standardization agreement. The function of the line is
printed in English across the colored portion of the
tape. Three-fourths of the total width on the left side of
the tape has a code color.
Non-English-speaking
people can troubleshoot or maintain the aircraft if they
know the color code.
The right-hand, one-fourth of the functional
identification tape contains a geometric symbol that is
different for every function. This symbol ensures that
all
technicians,
whether
colorblind
or
non-English-speaking will be able to identify the line
function. Figure 12-14 is a listing of functions and their
associated colors and identification markings as used
on tapes.
12-17
FUNCTION
COLOR
SYMBOL
FUEL
RED
ROCKET OXIDIZER
GREEN, GRAY
ROCKET FUEL
RED, GRAY
WATER INJECTION
RED, GRAY, RED
LUBRICATION
YELLOW
HYDRAULIC
BLUE. YELLOW
SOLVENT
BLUE, BROWN
PNEUMATIC
ORANGE, BLUE
INSTRUMENT AIR
ORANGE, GRAY
COOLANT
BLUE
BREATHING OXYGEN
GREEN
AIR CONDITIONING
BROWN, GRAY
MONOPROPELLANT
YELLOW, ORANGE
FIRE PROTECTION
BROWN
DE-ICING
GRAY
ROCKET CATALYST
YELLOW, GREEN
COMPRESSED GAS
ORANGE
ELECTRICAL CONDUIT
BROWN, ORANGE
INERTING
ORANGE, GREEN
ANf1214
Figure 12-14.—Functional identification tape data.
