Right To Know

Understanding Flammables and Combustibles

Learning Objectives Meaning of terms “Flammable”

and “Combustible Difference between:

Flammable Aerosols Flammable Gases Flammable Liquids Combustible Liquids Flammable Solids

Learning Objectives (cont)

Flammables and Combustibles in Your Area Physical Hazards Health Hazards Methods of Detection Emergency and Handling Procedures First Aid Procedures

Overview

Awareness Remember MSDS’s

Toluene (etc)

Definitions For a fire to occur there must be:

Fuel (the Flammable/Combustible substance) Heat Oxygen or an Oxidizer Chemical or Chain Reaction

Flammable – a material that is easily ignited and burns rapidly. In addition to the fire hazard, exposure to vapors from flammables can have serious health effects. Common Flammable: Gasoline

Combustible – a substance capable of fueling a fire, but will not burn as readily as a flammable. Common Combustible: Wood

Types of Flammables and Combustibles Types of Flammables

Aerosols Gases Liquids Solids

Types of Combustibles Many materials are combustibles, but

there is a special category og combustible liquids

Flammable Aerosols An Aerosol that yields a flame

projection for more then 18” at full valve opening, or a flashback (a flame extending back to the valve) at any degree of valve opening

In your Area MSDS’s

Incidents or Concerns

Flammable Gases A Compressed Gas with:

Lower Explosive Limit (LEL) at or below 13% by volume

Flammability Range greater than 12% regardless of the Lower Limit

LEL and other flammability information is determined by the chemical manufacturer, and can be found on the MSDS

Any terms like “LEL” can be found in the Glossary of the MSDS ( or MSDSonline System)

MSDS

Flammable Gases: Physical Properties and Hazards Properties

Expand to several times their volume when released May be Heavier than Air (Butane, Propane) and will

settle in low places May be Lighter than Air (Hydrogen, Methane)

Vapor Density will tell you whether it is Lighter or Heavier. Heavier = VD > 1.0, Lighter = VD <1.0

Does not always have an Odor Often Colorless Dangerous if cylinders are damaged. A damaged

valve may cause the cylinder to “Rocket” In Your Area

MSDS’s

Flammable Gases: Health Hazards All flammable gases are Simple

Asphyxiants. This means they will displace oxygen to a level below that needed for normal body functions

Some may also have Toxic effects, like Hydrogen Sulfide, that can result in Death

In your Area MSDS’s

Flammable Gases: Methods of Detection Odors are often added to flammable gases to

aid detection and, therefore, prevent injury. CAUTION: Some gases will quickly deaden the sense

of smell Large volumes escaping often make a hissing

sound Soap Solution can be used to find leaks Air Monitoring equipment is available to

identify leaks of flammable gases in your area Operators are first line of defense, but we can

assist with Air Monitoring and Hazard Analyses

Flammable Gases: Emergency Handling and Procedures Always

Transport and Store cylinders with valve cap on Never drag or roll cylinders, use carts Secure with straps or chains Keep Cylinder Upright Keep hose connections tight and leak-free Store Oxygen and Flammable Gas cylinders

separately If gas leaks: Ventilate and use respiratory protection;

turn off ignition valve; shut off the main cylinder valve Emergency Procedures in your Area Issues

Flammable Gases: First Aid General Procedures for overexposure

Inhalation: move victim to fresh air. If unconscious, maintain an open airway. Restore breathing if necessary. Seek medical attention.

Eyes: Hold eyelids open and flush for 15 minutes with large quantities of water. Seek medical attention.

Skin: Wash with large quantities of water. Seek medical attention

MSDS Information

Flammable Liquids

A substance with a Flash Point below 100°F. Flash Point – the minimum

temperature at which enough vapors are given off to support flame when an ignition source is present.

MSDS’s

Flammable Liquids: Physical Properties and Hazards Properties:

Vaporize quickly at room temperature Some are soluble in water (alcohols) Some are soluble in organic solvents or acids Variety of Odors (acetone smells sweet) Variety of colors, but are often clear Most have a specific gravity less than 1; this

means they will float on top of water Vapors are heavier than air and may settle in

low areas React violently with Oxidizers and Halogen

Gases (chlorine, fluorene) In Your Area

Flammable Liquids: Health Hazards

In addition to flammability the following Health symptoms are often present: Skin contact – may cause reddening

or drying Inhalation – may cause dizziness,

nausea or headaches, or may irritate respiratory tract

Flammable Liquids: Health Hazards (cont) In addition to the General symptoms:

Alcohols (end in -ol) mild irritants. Methanol when swallowed may cause blindness

Ketones (end in -one) slightly more toxic than alcohols

Aliphatic Hydrocarbons (end in -ane) may cause excitement, stupor, confusion

Amines (end in -amine, -amid, or -nitro) can cause liver, lung and kidney damage

Ethers (end in -ether, or -futan) may cause unconsciousness, pneumonia, and death

Aromatics (end in -ene) may cause convulsions, coma and death. Some are suspected carcinogens

In Your Area

Flammable Liquids:Methods of Detection All Flammable Liquids:

Have detectable Odors, although sense of smell may quickly become deadened

May cause tearing or redness of the eye May be felt on skin as an initial splash of liquid

Air Monitoring equipment is available to identify leaks of flammable gases in your area

Operators are first line of defense, but we can assist with Air Monitoring and Hazard Analyses

MSDS’s

Flammable Liquids:Personal Protective Equipment When working with Flammable Liquids

Wear approved respirator if ventilation is inadequate Wear splash goggles and a full face shield, where

necessary Wear solvent resistant gloves as prescribed in the

MSDS Wear a rubber apron, or, for large quantities a splash

suit when working with open containers of flammable liquids

PPE Recommended in Your Area MSDS’s

Flammable Liquids: Emergency and Handling Procedures Remember:

Always remove all sources of ignition Be certain area is well ventilated Never pour or wash flammable liquids into

sewers or drains When transferring flammable liquids,

ground containers. Not only must you ground the container you are pouring into, You Must ground the container you are pouring from to the container you are pouring to.

Issues

Flammable Liquids:First Aid Procedures In the event of overexposure:

Inhalation: move victim to fresh air. Rescuers should be equipped with proper PPE before attempting rescue. If unconscious maintain an open airway. Seek medical attention immediately.

Eyes: hold open eyelids and flush with water for 15 minutes. Seek medical attention immediately.

Skin: immediately wash with soap and water, or waterless cleanser. Remove contaminated clothing

MSDS’s

Combustible Liquids

Have a higher flashpoint then Flammable Liquids, meaning they will not burn as easily as flammables. Flash Point at or above 100°F, but below 200°F. Remember Flash Point for Flammable

Liquids was below 100°F.

Flammable Solids Any solid, other than explosives, that

can cause a fire by self-igniting through: Friction Spontaneous chemical changes Retained heat from manufacturing process Reactivity with air or water

In Your Area MSDS

Flammable Solids:Physical Properties and Hazards

Flammable Solids: Burn readily and persistent May generate chemical products that

are corrosive, poisonous, or flammable Require special extinguishing agents in

a fire In Your Area

MSDS

Flammable Solids:Health Hazards All Flammable Solids have potentially

severe health effects: Alkali Metals: react with moisture on body to

cause severe burns to skin, eyes, nose, and throat.

White Phosphorous: reacts with air to form phosphoric acid, which is corrosive to eyes, skin, nose, and throat. May affect the lungs.

Azides: many are toxic, causing a drop in blood pressure; inhibit enzyme action. May decompose explosively. Sensitive to heat, shock and friction

In Your Area

Flammable Solids:Methods of Detection

If material begins to ignite, fume or bubble when exposed to air or water, evacuate to a safe distance immediately and notify emergency personnel.

Flammable Solids: Emergency and Handling Procedures

For Emergency: For Spills: if air or water reactive,

evacuate personnel immediately, and notify emergency personnel.

For Fire: Notify emergency personnel and evacuate.

Always follow Safety Procedures

Flammable Solids:First Aid Procedures In the event of overexposure:

Inhalation: move victim to fresh air. Restore breathing if necessary. Seek medical attention immediately

Eyes: hold eyelids open and flush eyes with water for 15 minutes. Seek medical attention immediately.

Skin: immediately wash area with large quantities of cold water. Keep affected area cold. Seek medical attention immediately.

Ingestion (swallowing): seek medical attention immediately.

In Your Area MSDS

Summary Definitions:

Flammable - a material that is easily ignited and burns rapidly.

Combustible - a substance capable of fueling a fire, but will not burn as readily as a flammable

Types: Aerosols Gases Liquids Solids

In Your Area: Physical Properties

and Hazards Health Hazards Methods of Detection Emergency and

Handling Procedures First Aid Procedures