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Table 10. Color Coding Criteria for Piping Systems at Wastewater Facilities1

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MIL-HDBK-1005/9A
Table 10
Color Coding Criteria for Piping Systems at Wastewater
Facilities1
Pipe System
Color Code
Compressed air
Green with white bands
Potable and service water
Green
Waterline for heating digester
Blue with red band
(anaerobic)
Nonpotable water
Blue with white bands
Firefighting
Red
Natural gas
Orange with black bands and legend
Sludge gas (anaerobic digester)
Orange with white bands and legend
Raw sludge (any sludge)
Brown with black bands and flow
direction
Sludge recirculation suction
Brown with yellow bands and flow
direction
Sludge recirculation discharge
Brown with flow direction
Sludge drawoff
Brown with orange bands and flow
direction
Raw domestic wastewater
Gray with flow direction
Chlorine gas
Yellow with legend
Sulfur dioxide gas
Yellow with black bands and legend
Ammonia gas
Yellow with red bands and legend
Caustic soda and lime slurry
Orange with black bands, legend, and
flow direction
Concentrated acid (H2SO4, HCl)
Orange with red bands, legend, and
flow direction
Hydrogen peroxide feed
Orange with blue bands, legend, and
flow direction
Orange with flow direction2
Cyanide phenol and mixed wastewater
1
Does not apply to piping at pier, wharf, and drydock facilities.
Refer to MIL-HDBK-1005/8, paragraph 3.4.13 for pier, wharf, and
drydock facilities.
2
Further color coding of segregated wastes is not practical since
they are usually cross contaminated and require joint
treatment.
f)  Waste treatment from plating operations should
provide sufficient onsite storage capacity to allow for a
minimum of 8 hours of plating operation during waste treatment
shutdown periods.
79

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