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Utilitiesman Volume 01 - Manual for electric, plumbing, water and other utilities | Next
Table 1-3.—Cylinder Color Chart |
Titles should be stenciled or lettered on pipe (or
covering) where the view is unobstructed, such as on
the lower quarters. Lettering in this position is unlikely
to be obscured by dust collection or mechanical
damage. Titles should be in black or white ONLY and
be clearly visible from operating positions, especially
those next to control valves.
Use stencils with standard-size letters, as shown in
table 1-2. For pipelines smaller than three quarters of
an inch in diameter, use securely fastened metal tags
with lettering etched or filled in with enamel. Apply
titles with uppercase letters and Arabic numerals
whenever applicable.
PRIMARY COLOR WARNINGS should be a
single color, applied as a BAND (or BANDS), that
completely encircle(s) the piping system. They are
located on the piping system immediately next to all
operating accessories, such as valves, regulators,
strainers, and vents. The bands should be painted
throughout the system at convenient intervals where
branch lines join the system, where the system passes
underground or through walls, and at any other
conspicuous place where warnings are required. All
piping and covering of an entire system, excluding
straps, hangers, and supports, may be painted with the
primary color warning. When this is done, DO NOT
paint color bands of any kind on the system.
A colored ARROW should be used next to each
primary color warning applied to a piping system to
indicate the normal direction of flow of the material in
the system. A double-headed arrow is used on lines
subject to reverse flow. The color of arrows can be the
same as the primary warning when bands are
Table 1-2.—Size of Stencil Letters
Outside diameter of pipe or
covering
Inches
Under 1 ½
1 ½ to 3 ½
3 ½ to 6
6 to 9
9 to 13
Over 13
Size of Stencil
Letters
Inches
1/2
3/4
1 1/4
2
3
3 ½
used—black or white. (Refer to fig. 1-17 for
identification of piping systems.)
MARKING COMPRESSED GAS
CYLINDERS
Compressed gas cylinders used throughout the
Department of Defense are of a standard color code.
The material within is shown by a written title in two
locations diametrically opposite and parallel to the
longitudinal axis of the cylinder. Cylinders having a
background color of yellow, orange, or buff have the
title painted black. Cylinders having a background
color of red, brown, black, blue, gray, or green have the
title painted white.
A primary color warning relates to the primary
hazard of the material. These colors appear as a
circular band on piping systems and as main body, top,
or band colors on compressed gas cylinders.
Figure 1-17.—Identification of piping system.
1-19
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