compounds hazardous to life and property.
rigid line identification throughout the Depart-
However, t h e y do not normally produce
ment of Defense (fig. 6-76).
dangerous quantities of fumes or vapors.
The function of the line is identified by a
4. Physically dangerous materials (PHDAN).
1-inch-wide tape that contains printed word(s),
PHDAN marks a line carrying material that is not
color(s), and geometric symbols. Functional
dangerous within itself. However, the material is
identification markings (see MIL-STD-1247) are
asphyxiating in confined areas or is generally
the subject of an international standardization
handled in a dangerous physical state of pressure
agreement. Three-fourths of the total width on
or temperature.
the left side of the tape is a color or color code.
This code shows one function only per color or
Table 6-3 lists some of the fluids that you may
colors. The function of the line is printed in
work with and the hazards associated with each.
English across the colored portion of the tape. A
non-English-speaking person can troubleshoot or
maintain the aircraft if he/she knows the color
Table 6-3.-Hazards Associated With Various Fluids
code. The right-hand one-fourth of the functional
identification tape contains a geometric symbol.
This symbol is different for every function. This
allows a colorblind person to identify the line
function by means of the geometric design rather
than by the color. Look at figure 6-77. Here, you
see a listing of the functions and their associated
identification media as used on the tapes.
The identification-of-hazards tape shows the
hazard associated with the contents of the line.
Tapes that show hazards are one-half inch wide,
with the abbreviation of the hazard printed across
the tape. There are four general classes of hazards
found with fluid lines.
1. Flammable material (FLAM). The hazard
marking FLAM identifies all materials ordinarily
known as flammable or combustibles.
2. Toxic and poisonous materials (TOXIC).
TOXIC identifies lines containing materials that
are extremely hazardous to life or health.
3. Anesthetics and harmful materials (AAHM).
AAHM identifies all materials producing
anesthetic vapors and all liquid chemicals and
Figure 6-76.-Electrical line identification application.
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