COATINGS MANUAL
HRSD
6.0
EQUIPMENT AND PIPING COLOR IDENTIFICATION CODE
The objective of this Equipment and Piping Color Identification Code is to provide easy and
rapid identification of the various unit process equipment and piping in a treatment plant. The
large amount of equipment and piping in the treatment plant requires that a simple system be
used to identify and distinguish the equipment and piping.
A.
The Color Shade Code should be used to provide a uniform shade of color when using
various manufacturers and types of coatings (see Color Shade Code). The color should
be based on the U.S. Government Federal Register 595 Paint Color Number.
B.
The Color Selection Code should be used to select the color for all equipment and piping
in the treatment plant. The selected color for individual equipment and piping would be
based on the type of flow involved.
C.
The Equipment and Piping Color Identification Code should be used to identify all
equipment in the treatment plant (see Equipment & Piping Color Identification Code).
The identification for all equipment should include both the proper coating color and the
proper stenciled markings.
D.
1.)
Stenciled marking should be placed on multiple units of equipment to indicate the
unit number, i.e., No. 1, No. 2, etc.
2.)
Stenciled markings should be black or white in color to contrast with the
equipment background color as appropriate.
3.)
Stenciled markings should be 2 ½ inches in size.
The Equipment and Piping Color Identification Code should be used to identify all piping
in the treatment plant. The identification for all piping should include both the proper
coating color and the proper stenciled markings.
1.)
Stenciled markings should include both the proper unit process flow abbreviations
and a directional arrow indicating the proper flow direction as appropriate.
2.)
Stenciled markings should be placed wherever pipes pass thru walls, at the influent
and effluent of pumps or valves, at intersections, and at regular intervals along pipe
runs as appropriate.
3.)
Stenciled markings should be black or white in color to contrast with the pipe
background color as appropriate.
OD/Coatings Manual 2011
Section 6.0
COATINGS MANUAL
HRSD
4.)
Stenciled markings for pipes should be all capital letters sized as follows:
Pipe Size
Up to 1 ½ inch
2 to 6 inches
8 inches and up
E.
½ inch
1 ¼ inch
2 ½ inch
Color Shade Code
Color Shade
Aluminum
Black
Blue
Brown
Gray
Green, Dark
Green, Light
Orange
Red
White
Yellow
F.
Letter Size
U.S. Government Federal Register 595
Paint Color Number
17178
17038
15050
10091
16473
14062
14533
12246
11105
17875
13655
If piping is stainless steel and/or PVC and/or there are other viable reasons not to paint
(piping is already painted and may not be economical to repaint), then the following is
permissible: All piping must be distinctly marked with color-coded bands around the
pipe and labeled. All piping shall be frequently marked with color-coded bands and
labels as stated in item A, B, C, and D above.
OD/Coatings Manual 2011
Section 6.0
COATINGS MANUAL
HRSD
G.
EQUIPMENT AND PIPING COLOR IDENTIFICATION CODE
Equipment and Piping Color Identification Code
Unit Process
Odor Control
Flow
Non Potable Water
Non Potable Well Water
Potable Water
Drain
Drainage Pump Station
Discharge
Electrical Conduit
Fire Protection
Floor Drain
Fuel Oil
Fuel Oil Supply
Fuel Oil Return
Hot Water Supply
Hot Water Return
Hot Water Reverse Return
HVAC
Hydraulic Oil
Hot Potable Water
Lube Oil
Natural Gas
Polymer Dry Air
Process Drain
Propane
Roof Drain
Seal Water
Service Air ( Low
Pressure)
Service Air (High
Pressure)
Sanitary Drain
Sanitary Sewer Force
Main
Spray Water
Steam
Storm Drain
Sump Pump Discharge
Tank Drain
Vacuum
Vent
Odorous Air
Scrubber Blowdown
Scrubber Chemical Feed
OD/Coatings Manual 2011
Section 6.0
6-2
Color
Lt. Green
Lt. Green
Dk. Green
Gray
Gray
Abbreviation
NPW
NPWW
PW
DRAIN
DPSD
Red
Red
Gray
Black
Black
Black
Lt. Green
Lt. Green
Lt. Green
Gray
Black
Dk. Green
Black
Yellow
Blue
Gray
Yellow
Gray
Lt. Green
Blue
FIRE
FD
FO
FOS
FOR
HWS
HWR
HW REV RET
HVAC
HDO
HPW
LO
NAT GAS
DA
DRAIN
LP
RD
SW
LPSA
Blue
HPSA
Gray
Gray
DRAIN
SSFM
Lt. Green
Aluminum
Gray
Gray
Gray
Blue
Gray
Gray
Orange
Orange
SPRAY
STEAM
STORM
SPD
DRAIN
VAC
V
OA
SBD
SCF
COATINGS MANUAL
HRSD
Equipment and Piping Color Identification Code
Unit Process
Preliminary
Treatment
Primary
Treatment
Intermediate
Treatment
Biological
Treatment
Flow
Scrubber Recirculation
Cleaning
Scrubber Recirculation
Discharge
Scrubber Recirculation
Suction
Scrubber Drain
Scrubber Exhaust
Scrubber Intake
Scrubber (vessel)
Cyclone Influent
Cyclone Recycle
Grit
Raw Wastewater Influent
Screened Effluent
Septic Tank Unloading
Primary Clarifier Influent
Primary Clarifier Effluent
Primary Clarifier Solids
Primary Scum
Oxidation Tower Influent
Oxidation Tower Effluent
Intermediate Clarifier
Influent
Intermediate Clarifier
Effluent
Intermediate Biosolids
Intermediate Scum
Aerated Supernatant
Return
Anaerobic Influent
Anaerobic Effluent
Anoxic Influent
Anoxic Effluent
Anoxic Recycle
Aeration Influent
Aeration Effluent
Mixed Liquor
Nitrified Recycle
Secondary Clarifier
Influent
Secondary Clarifier
Effluent
Secondary Scum
Return Activated Solids
OD/Coatings Manual 2011
Section 6.0
6-3
Color
Orange
Abbreviation
SRC
Orange
SRD
Orange
SRS
Gray
Gray
Gray
Gray
Gray
Gray
Gray
Gray
Gray
Gray
Gray
Gray
Brown
Gray
Gray
Gray
Gray
DRAIN
SCRUB EXH
SCRUB INTK
--CYCL INF
CYCL RCY
GRIT
RWI
SE
SEPTIC UNLDG
PCI
PCE
PCS
SCUM
OTI
OTE
ICI
Gray
ICE
Brown
Gray
INS
SCUM
ASR
Gray
Gray
Gray
Gray
Gray
Gray
Gray
Brown
Gray
Gray
ANI
ANE
AXI
AXE
ARCY
ARI
ARE
MLSS
NRCY
SCI
Gray
SCE
Gray
Brown
SCUM
RAS
COATINGS MANUAL
HRSD
Equipment and Piping Color Identification Code
Unit Process
Disinfection
Effluent Pumping
Scum Disposal
Solids
Thickening
Digestion
Solids Holding
Tank
Flow
Waste Activated Solids
Contact Tank Effluent
Contact Tank Scum
Final Effluent
Holding Pond Drain
Feed Scum
Concentrated Scum
Scum Concentrator
Subnatant
Scum
Decant Supernatant Return
Decant Tank Drain
Flotation Thickener Feed
Solids
Flotation Thickener
Recycle
Flotation Thickened Solids
Flotation Thickener
Subnatant
Gravity Belt Thickener
Feed Solids
Gravity Belt Thickener
Filtrate
Gravity Belt Thickened
Solids
Gravity Thickener Feed
Solids
Gravity Thickened Solids
Gravity Thickener
Overflow/Supernatant
Primary Digester Feed
Solids
Primary Digested Solids
Digester Recirculation
Solids
Primary Digester
Supernatant
Primary Digester Transfer
Solids
Secondary Digested Solids
Secondary Digester
Supernatant
Digester Gas
Holding Tank Feed Solids
OD/Coatings Manual 2011
Section 6.0
6-4
Color
Brown
Gray
Gray
Gray
Gray
Gray
Gray
Gray
Abbreviation
WAS
CTE
SCUM
FNE
DRAIN
FD SCUM
CN SCUM
SCB
Gray
Gray
Gray
Brown
SCUM
DSR
DRAIN
FTFS
Gray
FTRCY
Brown
Gray
FTS
FSB
Brown
GBFS
Gray
GBFL
Brown
GBTS
Brown
GTFS
Brown
Gray
GTS
GSP
Brown
PDFS
Brown
Brown
PDS
DRS
Gray
PDSP
Brown
PDXS
Brown
Gray
SDS
SDSP
Yellow
Brown
DGAS
HTFS
COATINGS MANUAL
HRSD
Equipment and Piping Color Identification Code
Unit Process
Solids
Conditioning
Solids
Dewatering
Solids
Incineration
Nitrification
Enhancement
Facility
Chemicals
Chemical Storage
Tanks
Flow
Conditioning Tank Feed
Solids
Centrifuge Feed Solids
Centrifuge Biosolids Cake
Centrifuge Centrate
Centrifuge Thickened
Biosolids
Centrifuge Thickening
Centrate
Foreign Biosolids Loading
Foreign Biosolids
Unloading
Incinerator Feed Cake
Incinerator Ash
Incinerator Scrubber
Water Effluent
Scrubber Intake
Scrubber Exhaust
Nitrification Enhancement
Facility Influent
Nitrification Enhancement
Facility Aeration Effluent
Nitrification Enhancement
Facility Secondary
Effluent
Nitrification Enhancement
Facility Solids
Acid Wash Supply
Acid Wash Return
Alum
Ammonia
Caustic
Caustic Solution
Dry Polymer
Ferric/Ferrous
Hydrogen Peroxide
Liquid Polymer
Muriatic
Polymer Solution
Sodium Bisulfite
Sodium Bisulfite Solution
Sodium Hypochlorite
Sodium Hypochlorite
Solution
Chemical Tanks
OD/Coatings Manual 2011
Section 6.0
6-5
Color
Brown
Abbreviation
CNFS
Brown
Brown
Gray
Brown
CFS
CCK
CCT
CTS
Gray
CTCT
Brown
Brown
FLS
FUS
Brown
Brown
Gray
IFC
ASH
ISE
Gray
Gray
Gray
SI
SE
NEFINF
Brown
NEFARE
Brown
NEFSCE
Brown
NEFS
Orange
Orange
Orange
Orange
Orange
Orange
Orange
Orange
Orange
Orange
Orange
Orange
Purple
Orange
Orange
Orange
AWS
AWR
ALUM
AMMONIA
CAUSTIC
CAUSTIC SOL
DPOLY
FERRIC/FERROUS
PEROXIDE
LPOLY
MURIATIC
POLY SOL
BISULFITE
BISULFITE SOL
HYPO
HYPO SOL
Gray OR
White
(Name of Chemical)
COATINGS MANUAL
HRSD
Equipment and Piping Color Identification Code
Unit Process
Bollards
Water
Reclamation
Misc
Flow
Reclaimed Water Main
Abandoned
Sample
OD/Coatings Manual 2011
Section 6.0
6-6
Color
Yellow
Purple
Unit
Process
Color
Abbreviation
--RWM
ABAND
(Unit Process
Name)/SAMP