iPlanners and Estimators Handbook, NAVFAC
P-405. There is a big need in the Navy for petty officers
who are skilled supervisors. Consider the role of
supervisor as a big challenge and endeavor to become
proficient in all areas of the supervisors job.
What are the two benefits for the Navy when a
project is planned properly?
Q13. As a supervisor, what is the first thing you should
do once planning is complete?
COLORS FOR SAFETY
LEARNING OBJECTIVE: Recognize piping, gas
cylinders, and general safety color coding.
Color warnings provide for marking physical
hazards, for indicating the location of safety
equipment, and for identifying fire and other protective
equipment. As a Utilitiesman, you may often be
concerned with uniform colors used for marking
pipelines carrying hazardous materials, compressed
gas cylinders, and fire- protection equipment.
CLASSES OF MATERIALS AND
THEIR COLOR CODES
Five classes of materials have been selected to
represent the general hazards for all dangerous
materials, while a sixth class has been reserved for fire-
protection materials. A standard color represents each
of these classes, as shown in table 1-1.
In some instances, piping systems that do not
require warning colors may be painted to match
surroundings; in other instances, such systems may be
painted aluminum, black, or remain unpainted.
MARKING PIPING SYSTEMS
In addition to color warnings, WRITTEN
TITLES should be used to identify hazardous or
dangerous materials conveyed in piping systems.
Table 1-1.Warning Colors
Class of Material
Yellow, number 13655
FLAMMABLE MATERIALS. All materials known
Brown, number 10080
Blue, number 15102
Green, No 14260
ordinarily as flammables or combustibles. Of the
chromatic colors, yellow has the highest coefficient of
reflection under white light and can be recognized
under the poorest conditions of illumination.
TOXIC AND POISONOUS MATERIALS. All
materials extremely hazardous to life or health under
normal conditions as toxics or poisons.
ANESTHETICS AND HARMFUL MATERIALS.
All materials productive of anesthetic vapors and all
liquid chemicals and compounds hazardous to life and
property but not normally productive of dangerous
quantities of fumes or vapors.
OXIDIZING MATERIALS. All materials which
readily furnish oxygen for combustion and fire
producers which react explosively or with the
evolution of heat in contact with many other materials.
Gray, number 16187
Red, No. 11105
PHYSICALLY DANGEROUS MATERIALS. All
materials not dangerous in themselves, which are
asphyxiating inconfined areas or which are generally
handled in a dangerous physical state of pressure or
FIRE PROTECTION MATERIALS. All materials
provided inpiping systems or in compressed-gas
cylinders exclusively for use in fire protection.