UFC 4-390-01
23 July 2003
Helium
HE
Buff
Oxygen
OX
Green
Helium-Oxygen mix
HE-OX
Buff & Green
NIT
Light Gray
EXH
Silver
Air (low pressure)
ALP
Black
Air (high
AHP
Black
pressure)
Chilled Water
CW
Blue & White
Hot Water
HW
Red & White
PW
Blue
FP
Red
Material
Piping system components must have a standardized labeling scheme
throughout, with unique component identifiers that match the
system drawings and system operating and emergency procedures.
Such standardization is important for approval of operating and
emergency procedures, continuity of system manuals and personnel
training.
B.8.3.2 Cleaning and Testing. All cleaning and testing of
piping for unmanned pressure test facilities should be in
accordance with NAVFAC approved procedures. Cleaning of oxygen,
helium, HEOX and NITROX piping systems should meet the
requirements of MIL-STD-1330, Precision Cleaning and Testing of
Shipboard Oxygen, Helium, Helium-Oxygen, and Nitrogen Systems.
All pressure retaining components of the piping system must be
hydrostatically tested for strength and porosity after completion
of the installation and/or after welding or brazing. Individual
components (e.g., valves, pressure regulators, volume tanks,
etc.,) may be tested prior to installation in the system. In gas
systems, pressure-measuring devices, such as gages and sensors,
should not be hydrostatically tested due to the possibility of
component damage.
Additional tests must also be performed to ensure system
tightness and proper operation of components. General testing
requirements are provided in Section 3. Appendix C provides
specific component testing requirements for installation and
repair of components.
Protection devices such as caps, plugs and plastic bags should be
used to prevent entrance of foreign materials whenever the system
integrity is broken and to protect the sealing surfaces of the
components. Both male and female connections should be
protected. Caps, plugs and plastic bags that introduce
particulate contamination from shedding, moisture and tapes that
leave adhesive deposits should not be used for this purpose.
Caps and plugs should be cleaned to the acceptable level of
system cleanliness before each use in accordance with approved
cleaning procedures. When not in use, protection devices should
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