From Recommended Standards for Water Works and Recommended Standards for Wastewater Facilities (The "Ten States Standards") |
WATER
TREATMENT PLANT COLOR CODING
TYPE
OF PIPE
|
USE
OF PIPE
|
COLOR
OF PIPE
|
Water Lines: | Raw
water |
Olive Green |
Settled or clarified water | Aqua | |
Finished or potable water | Dark Blue | |
Chemical Lines: | Alum or primary coagulant | Orange |
Ammonia | White | |
Carbon slurry | Black | |
Caustic | Yellow w/ green band | |
Chlorine gas or solution | Yellow | |
Fluoride | Light blue w/ red band | |
Lime slurry | Light green | |
Ozone | Yellow w/ orange band | |
Phosphate compounds |
Light green w/ red band |
|
Polymers or coagulant aids | Orange w/ green band | |
Potassium permanganate | Violet | |
Soda ash | Light green w/ orange band | |
Sulfuric Acid | Yellow w/ red band | |
Sulfur Dioxide | Light green w/ yellow band | |
Waste Lines: | Backwash waste | Light Brown |
Sludge | Dark Brown | |
Sewer (sanitary or other) | Dark Gray | |
Other Lines: | Compressed Air | Dark Green |
Gas | Red | |
Other Pipes | Light Gray |
Wastewater Treatment Plant Color Coding
TYPE
OF PIPE
|
USE
OF PIPE
|
COLOR
OF PIPE
|
Sludge Lines: | Raw Sludge | Brown w/ black bands |
Sludge recirculation or suction | Brown w/ yellow bands | |
Sludge drw off | Brown w/ orange bands | |
Sludge recirculation discharge | Brown | |
Gas Lines: | Sludge Gas | Orange (or Red) |
Natural Gas | Orange (or Red) w/ Black bands | |
Water Lines: | Nonpotable Water | Blue w/ black bands |
Potable Water | Blue | |
Water for heating digestors or buildings | Blue with a 6 in. (150mm) red band space 30 in. (760mm) apart | |
Other Lines: | Chlorine | Yellow |
Sulfur Dioxide | Yellow w/ Red bands | |
Sewage (wastewater) | Gray | |
Compressed Air | Green |
It is also suggested that the direction of flow and name of the contents be noted on all lines...