IDENTIFICATION OF PIPE BY COLOR
COLOR CODING OF PIPING
NATIONAL BUILDING CODE (Rule X – Mechanical Regulations) pp196
NBC Amended Rules and Regulation (PD 1096)
Rule XIII Electrical and Mechanical Regulations
COLOR
RED
ORANGE
YELLOW
GREEN
MATERIAL PIPED
PIPE IDENTIFICATION
Carbon Dioxide
Water (Fire Service)
Carbon Dioxide
Fire Service Water
Acetylene
Blast Furnace Gas
Gasoline
Grease
Hydrogen
Oxygen
Oil
Tar
Producer Gas
Liquid Petroleum Gas
Oil and Water
Vacuum-High
Acetylene
B.F. Gas
Gasoline
Grease
Hydrogen
Oxygen
Oil
Tar
Producer Gas
LPG
Oil and Water
High Vacuum
Acid
Air-High Pressure
Ammonia
Steam-High Pressure
Steam-Low Pressure
Water-Boiler Feed
Water-Hot
Water-High Pressure
Acid
H.P. Air
Ammonia
H.P. Steam
L.P. Steam
Boiler Feed Water
Hot Water
H.P. Water
Air-Low Pressure
Argon-Low Pressure
Helium-Low Pressure
Nitrogen-Low Pressure
Water-Cold
Water-Distilled
Water-Low Pressure
Water-Treated
Oil and Water
L.P. Air
L.P. Argon
L.P. Helium
L.P. Nitrogen
Cold Water
Distilled Water
L.P. Water
Treated Water
Oil and Water
DIVISION
DESIGNATION
COLOR
Steam
High Pressure
Exhaust System
WHITE
BUFF
Water
H.P. & L.P. Fresh Water
Salt Water
BLUE
GREEN
Oil
Delivery
Discharge
BRASS BRONZE
YELLOW
Pneumatic
All Piping
GRAY
Gas
Fuel Oil
Refrigeration
All Piping
All Piping
Pipes and Fittings
BLACK