7.
COLOR CODE FOR PIPING SYSTEMS. All pipe and tubing in a hyperbaric
installation must be color coded and labeled to indicate contents, function,
direction of flow and possible hazards.
All lines must be identified and labeled preferably according to MIL-STD-
1247, Markings, Functions, and Hazard Designations of Hose, Pipe, and Tube
Lines for Aircraft, Missile and Space Systems (see Reference (24)), except
for color.
A redundant identification system shall be used to identify each type of
gas and primary hazard, both by color and by word or letter symbol.
COLOR CODE FOR SHORE BASED SYSTEMS
Gas System
Designation
Color Paint
Helium
He
Buff
Oxygen
O
Green
Helium-Oxygen mix
He-O
Buff and Green
N
Light Gray
E
Silver
Air (low pressure)
ALP
Tan
Air (high pressure)
AHP
Dark Gray
Chilled Water
CW
Blue and White
Hot water
HW
Red and White
Potable Water
FW
Blue
The color code for AFLOAT and Portable systems is the same, except that high
and low pressure air are both colored black.
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