Stell Main Catalogue

Plant Labelling | Tank Labelling

NFPA 704 Hazard Diamond Standard System for the Identification of the Hazard of Materials for Emergency Response In case of accidents involving hazardous substances, the hazard diamond helps safety and rescue forces to immediately evaluate possible dangers. The hazard diamond shows four coloured fields: blue for safety hazards, red for flammability, yellow for instable substances and a white field at the bottom for specific warning information.

Health Hazard

0 1 2 3 4 0 1 2 3 4

Poses no health hazard

Minor hazard | breathing apparatus recommended

Dangerous | Wear light protective clothing and breathing apparatus in danger zone Very dangerous | Wear full protective clothing and breathing apparatus in danger zone Can be lethal | Avoid any contact with vapours or liquids without suitable protective equipment

Flammability

Materials will not burn under typical conditions

Materials require considerable preheating before ignition/ combustion can occur

Materials must be moderately heated before ignition can occur Materials can be ignited under almost all ambient temperature

Materials will burn readily at normal temperatures

Instability

0 1

Normally stable

Can become unstable at elevated temperatures | Protection measures required

2 Violent chemical reaction possible; advanced protection measures required; execute fire-fighting only from safe distance 3 Capable of detonation or explosive decomposition when heated or severely shocked; establish a safety zone; execute fire-fighting only from safe distance 4 Readily capable of detonation or explosive decomposition; establish a safety zone; evacuate area in case of fire

(empty) Use water as extinguishing agent W

Do not use water as extinguishing agent Oxidizer, chemicals burn without air supply

OX

ACID ALK COR

Strong acid Strong base

Strong corrosive

BIO

Biological hazard Radioactive hazard

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