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Pipe Identification Table

NOTES:

1) The list of application in the third column and exclusions in the fourth column may not be exhaustive.

2) Services containing materials for human consumption have a supplementary colour (see clause 8.1)

PIPE IDENTIFICATION COLOURS AND THEIR USES

 

Colour name and basic identification

Colour

Applications (See Note 1 above)

Exclusions (See Note 1 above)

Green
- Water

 

Drinking water (see note 2)
Waste water
Cooling water, including:
seawater
Heating water
Storm water
Hydraulic power supply
Recycled water

Sewage and other dangerously polluted waste water

Silver-grey
- Steam

 

Live steam
Process steam
Exhaust steam
Space heating steam

 

 

 

Brown
- oils, flammable and combustible liquids

 

Fuel and lubricating oils
Animal and vegetable oils for food processing (see Note 2)
Petrol, diesel and other light fraction fuels
Other flammable or
combustible liquid substances

Liquefied gases under pressure

Yellow-ochre
- gases

 

Fuel gases
Process gases
Liquefied gases under
Pressure
Pneumatic transport of
particulate solids
Exhaust gases and fumes
Medical gases (see Note 2)

 

Air
Highly acid or alkaline gases

Violet
-acids and alkalis

 

All corrosive liquids and gases

 

Light Blue
- air

 

Compressed air
Instrument air
Vacuum
Ventilation
Pneumatic conveyor

 

Black
- other liquids

 

Chemical mixtures in water or organic solvent
Liquid foodstuffs (see Note 2)
Sewage, organic waste
Chemical and process wastes

Corrosive materials
Flammable or combustible material

Red
- fire services

 

Dedicated water, foam, other fire extinguishing supply lines

Electrical suppy
Communication circuits

Orange
- electric power

 

Electricity supply circuits

Extra-low voltage
circuits

White
- communication

 

Telephone and other
communication circuits
Extra-low voltage supply