18-06-2012, 11:18 AM
NFPA 704 Hazard Identification System
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INTRODUCTION
NFPA 704
Standard System for the Identification of the Hazards of Materials for Emergency Response
HEALTH HAZARDS
The ability of a material to cause injury to a person through contact or entry to the body via inhalation, ingestion, skin contact or eye contact
Materials that, under emergency conditions, would offer no hazard beyond that of ordinary combustible materials.
FLAMMABILITY HAZARDS
The ability of a material to burn under one set of conditions, but not under others.
The form or condition of the material.
The inherent properties of the material.
Materials that will rapidly or completely vaporize at atmospheric pressure and normal ambient temperature or that are readily dispersed in air and will burn readily.
Liquids and solids that can be ignited under almost all ambient temperature conditions. Materials in this degree produce hazardous atmospheres with air under almost all ambient temperatures or, though unaffected by ambient temperatures, are readily ignited under most all conditions.
Materials that must be moderately heated or exposed to relatively high ambient temperatures before ignition can occur. Materials in this degree would not under normal conditions form hazardous atmospheres with air, but under high ambient temperatures or under moderate heating could release vapor in sufficient quantities to produce hazardous atmospheres with air.
[attachment=24670]
INTRODUCTION
NFPA 704
Standard System for the Identification of the Hazards of Materials for Emergency Response
HEALTH HAZARDS
The ability of a material to cause injury to a person through contact or entry to the body via inhalation, ingestion, skin contact or eye contact
Materials that, under emergency conditions, would offer no hazard beyond that of ordinary combustible materials.
FLAMMABILITY HAZARDS
The ability of a material to burn under one set of conditions, but not under others.
The form or condition of the material.
The inherent properties of the material.
Materials that will rapidly or completely vaporize at atmospheric pressure and normal ambient temperature or that are readily dispersed in air and will burn readily.
Liquids and solids that can be ignited under almost all ambient temperature conditions. Materials in this degree produce hazardous atmospheres with air under almost all ambient temperatures or, though unaffected by ambient temperatures, are readily ignited under most all conditions.
Materials that must be moderately heated or exposed to relatively high ambient temperatures before ignition can occur. Materials in this degree would not under normal conditions form hazardous atmospheres with air, but under high ambient temperatures or under moderate heating could release vapor in sufficient quantities to produce hazardous atmospheres with air.