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Colors as Safety Signals

The American National Standards Institute schedule of safety colors for marking physical hazards.

for 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
X Ray, Medical equipment
Reactors, Nuclear Plants

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 OF:
FIRST AID DISPENSERS
FIRST AID KITS
GAS MASKS
STRETCHER
SAFETY SHOWERS
OTHER SAFETY EQUIPMENT
SAFETY INSTRUCTION SIGNS

for Pipe Identification

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.

BLUE - PROTECTIVE MATERIALS FOR PREVENTING OR REDUCING HAZARDS OF HazMats
INCLUDES SPECIAL GASES TO COUNTERACT OR NEUTRALIZE POISONOUS FUMES, WHICH ARE PIPED FOR RELEASING IN EVENT OF DANGEROUS PROTECTIVE MATERIAL OTHER THAN FIRE PROTECTION

GREEN - MATERIALS LOW IN TEMPERATURES AND PRESSURES: NON-POISONOUS NON-FLAMMABLE
WATER, SYRUPS, GLYCOLS

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