Color Coding and Indexing

Indexing Table
Visual Indexing Guide

Indexing Table

Service	Service Class	Symbol	Handle Color	Ring Color	Disc Color
Cooling tower / sprinkling water	Water	WCS	Green	Green	Yellow
Potable water, hot	Water	WPH	Green	Green	Red
Potable water, cold	Water	WPC	Green	Green	Blue
Spring water	Water	WSP	Green	Yellow	Yellow
Non-potable water, hot	Water	WNH	Green	Yellow	Red
Non-potable water, cold	Water	WNC	Green	Yellow	Blue
Steam	Water	WST	Green	Red	Red
Condensate	Water	WCO	Green	Red	Blue
Super-clean water, hot	Water	WCH	Green	Red	White
Super-clean water, cold	Water	WCC	Green	Blue	White
Coolant water return	Water	WCR	Green	Blue	Red
Coolant water feed	Water	WCF	Green	Blue	Blue
Surface water, hot	Water	WSH	Green	Black	Red
Surface water, cold	Water	WSC	Green	Black	Blue
Deionised water, hot	Water	WDH	Green	Gray	Red
Deionised water, cold	Water	WDC	Green	Gray	Blue
River water, hot	Water	WRH	Green	White	Red
River water, cold	Water	WRC	Green	White	Blue
Distilled water	Water	WDI	Green	White	White
Natural gas	Flammable Gaseous Hydrocarbons	G	Yellow	Yellow	Yellow
Propane/butane (liquefied gases)	Flammable Gaseous Hydrocarbons	LPG	Yellow	Red	Yellow
Methane	Flammable Gaseous Hydrocarbons	CH4	Yellow	Blue	Yellow
Propane	Flammable Gaseous Hydrocarbons	C3H8	Yellow	Blue	Red
Butane	Flammable Gaseous Hydrocarbons	C4H10	Yellow	Blue	Blue
Ethene	Flammable Gaseous Hydrocarbons	C2H4	Yellow	Black	Green
Propene	Flammable Gaseous Hydrocarbons	C3H6	Yellow	Black	Red
Butene	Flammable Gaseous Hydrocarbons	C4H8	Yellow	Black	Blue
Acetylene	Flammable Gaseous Hydrocarbons	C2H2	Yellow	White	Green
Argon/methane	Other Combustible Gases and Gas Mixtures	AR/CH4	Red	Yellow	Gray
Hydrogen/nitrogen	Other Combustible Gases and Gas Mixtures	H2/N2	Red	Red	Green
Hydrogen	Other Combustible Gases and Gas Mixtures	H2/N2	Red	Red	Red
Silane	Other Combustible Gases and Gas Mixtures	SiH4	Red	Red	Black
Hydrogen/helium	Other Combustible Gases and Gas Mixtures	H2/He	Red	Red	Gray
Deuterium	Other Combustible Gases and Gas Mixtures	D2	Red	Red	White
Nitrogen	Non-Flammable Gases, Combustion-Enhancing Gases	N2	Blue	Green	Green
Dinitrogen monoxide	Non-Flammable Gases, Combustion-Enhancing Gases	N20	Blue	Green	Blue
Air, synthetic, 80/20	Non-Flammable Gases, Combustion-Enhancing Gases	SA	Blue	Blue	Green
Compressed air	Non-Flammable Gases, Combustion-Enhancing Gases	CA	Blue	Blue	Yellow
Oxygen	Non-Flammable Gases, Combustion-Enhancing Gases	O2	Blue	Blue	Blue
Carbon dioxide	Non-Flammable Gases, Combustion-Enhancing Gases	CO2	Blue	Blue	Black
Regulated air	Non-Flammable Gases, Combustion-Enhancing Gases	RA	Blue	Blue	Gray
Breathing air	Non-Flammable Gases, Combustion-Enhancing Gases	BA	Blue	Blue	White
Carbogen (CO2 + O2)	Non-Flammable Gases, Combustion-Enhancing Gases	CB	Blue	Black	Blue
Krypton	Non-Flammable Gases, Combustion-Enhancing Gases	Kr	Blue	Gray	Yellow
Xenon	Non-Flammable Gases, Combustion-Enhancing Gases	Xe	Blue	Gray	Red
Neon	Non-Flammable Gases, Combustion-Enhancing Gases	Ne	Blue	Gray	Black
Argon	Non-Flammable Gases, Combustion-Enhancing Gases	Ar	Blue	Gray	Gray
Helium	Non-Flammable Gases, Combustion-Enhancing Gases	He	Blue	Gray	White
Ammonia	Toxic Gases	NH3	Black	Green	Red
Nitrogen dioxide	Toxic Gases	NO2	Black	Green	Blue
Nitrogen monoxide	Toxic Gases	NO	Black	Green	Black
Hydrogen sulphide	Toxic Gases	H2S	Black	Red	Yellow
Arsine	Toxic Gases	AsH3	Black	Red	Black
Phosphine	Toxic Gases	PH3	Black	Red	Gray
Hydrogen chloride	Toxic Gases	HCl	Black	Red	White
Sulphur dioxide	Toxic Gases	SO2	Black	Blue	Yellow
Carbon monoxide	Toxic Gases	CO	Black	Blue	Black
Phosgene	Toxic Gases	COCl2	Black	Black	White
Chlorine	Toxic Gases	Cl2	Black	White	White
Low vacuum(1000 - 1mbar)	Vacuum	V	Gray	Gray	Black
Fine vacuum	Vacuum	VF	Gray	Gray	Gray
High vacuum	Vacuum	VH	Gray	Gray	White
Formaldehyde solution	Miscellaneous	CH2O	White	Red	Green
Propanol	Miscellaneous	C3H8O	White	Red	Yellow
Methanol	Miscellaneous	CH4O	White	Red	Blue
Acetone	Miscellaneous	C3H6O	White	Red	Gray
Trichloroethylene	Miscellaneous	C2HCl3	White	Red	White
Perchloric acid	Miscellaneous	HClO4	White	White	Red

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Indexing Table

Visual Indexing Guide

Indexing Table

Visual Indexing Guide