Safety Signals - recommended Colors

American National Standards Institutes schedule for safety colors marking physical hazards

Recommended use of colors with additional information about piping, duct-work, etc.

PLANT EQUIPMENT
RED = FIRE PROTECTION	ALARM BOXES
	BLANKET BOXES
	BUCKETS
	EXTINGUISHERS
	HOSE LOCATIONS PUMPS
	HYDRANTS
	SIRENS
	EXIT SIGNS
	SAFETY CANS AND CONTAINERS FOR FLAMMABLE LIQUIDS
YELLOW = CAUTION	FRONT ENDS OF LOCOMOTIVES
	HAND RAILS
	BULLDOZERS
	TRACTORS
	EXPOSED EDGES OF PLATFORMS AND CURBING
	GUARDRAILS
	PILLARS & POSTS
	COLUMNS
	FORK LIFTS
	DOORWAY PROJECTIONS
	LOW BEAMS
	PULLEY BLOCKS AND CRANES
	CONVEYORS
	CAUTION SIGNS
PURPLE = RADIATION HAZARDS
ORANGE = DANGEROUS MACHINERY PARTS (WHICH MAY CUT, CRUSH OR SHOCK)	EXPOSED PARTS OF PULLEYS
	GEARS
	ROLLERS
	CUTTING DEVICES
	POWER JAWS
	SAFETY STARTING BUTTONS
	INSIDE OF MOVABLE GUARDS
	ELECTRICAL SWITCH BOXES
	FUSE BOXES
BLUE = WARNING AGAINST STARTING, OR MOVING EQUIPMENT UNDER REPAIRS	LADDERS
	SCAFFOLDING
	ELECTRICAL CONTROLS
	ELEVATOR STARTING CONTROLS
	BOILERS
	DRYERS
	MACHINERY, ETC.
GREEN = SAFETY DESIGNATES LOCATION	FIRST AID DISPENSERS
	FIRST AID KITS
	GAS MASKS
	STRETCHER
	SAFETY SHOWERS
	OTHER SAFETY EQUIPMENT
	SAFETY INSTRUCTION SIGNS
IDENTIFICATION OF PIPES
RED = FIRE PROTECTION AND SPRINKLER PIPING	POST INDICATOR VALVES FOR SPRINKLER SYSTEMS
YELLOW OR ORANGE - DANGEROUS MATERIALS	FLAMMABLE LIQUIDS GASOLINE, NAPHTHA, FUEL OIL, ETC.
	POISONOUS GASES CHLORINE GAS, AMMONIA, SULPHUR DIOXIDE, ETC.
	CORROSIVE LIQUIDS ACIDS, ALKALIS
	STEAM, WATER, OR AIR AT HIGH TEMPERATURES AND PRESSURES
GREEN = MATERIALS LOW IN TEMPERATURES AND PRESSURES: NON-POISONOUS NON-FLAMMABLE	FIRST AID DISPENSERS
	FIRST AID KITS
	GAS MASKS
	STRETCHER
	SAFETY SHOWERS
	OTHER SAFETY EQUIPMENT
	SAFETY INSTRUCTION SIGNS
BLUE = PROTECTIVE MATERIALS FOR PREVENTING OR REDUCING HAZARDS OF DANGEROUS MATERIALS	INCLUDES SPECIAL GASES TO COUNTERACT OR NEUTRALIZE POISONOUS FUMES, WHICH ARE PIPED FOR RELEASING IN EVENT OF DANGEROUS PROTECTIVE MATERIAL OTHER THAN FIRE PROTECTION

Standards

• ANSI Z535.1 American National Standard for Safety Colors
• ISO 3864 Graphical symbols -- Safety colors and safety sig