|
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...