Hazmat Flashcards
The term LP refers to Liquefied Petroleum Gases, which are stored as a liquid under pressure but vaporize into a gas when the pressure is released. They are
also referred to as “LPG” or “Bottled Gas”. They are generally composed of propane, butane or some combination thereof.
NON TOXIC
NON POISONOUS
ODORLESS
FLAMMABLE
-presents a hazard to HIGHLY VOLATILE FLAMMABLE LIQUID WITH MORE RAPID VAPORIZATION
HEAVY THEN AIR (1.5 to 2 times heavier)
Whenever possible, approach the fire or leak from up-wind. Keep nozzle low and aim it upward to disperse gases or flaming vapors.
Clear all Persons out of the vapor cloud area, evacuate areas in the path of the vapor cloud immediately. Shut off all sources of ignition at the same time. Keep
in mind that LP gas is heavier than air
Keep everyone, not actually engaged in operations, at least 1000 feet from the front and rear of the tank and 500 feet from the sides.
PORTABLE DRY CHEM IS EFFECTIVE ON LPG AND CO2 WILL WORK
1000 feet from and rear
500 from sides
-Do not extinguish the fire until the leak has been stopped, except under extremely
unusual conditions-
If the only valve that can be used to stop the flow of gas is involved in fire or is exposed to heat or flame, consider the possibility of using a heavy fog stream to
protect member while they shut off the valve. Proceed slowly to prevent flashback which may entrap the member in flames. Members involved should
wear masks and protective fire clothing
Tank surfaces that are exposed to heat, either from auto exposure or fire from another source, can be protected by supplying large quantities of water on them. Approach the tank from the sides, applying water to all exposed surfaces as well as piping and valves
Where escaping gas is on fire and the flow cannot be shut off, application of large quantities of water on the tank and piping will permit controlled burning, allowing
the fire to consume the contents of the tank without the danger of tank or pipe failure. Make certain that fire is NOT extinguished
Tank failure usually occurs in …
VAPOR AREA.
-Sometimes a frost line can show liquid level
BEFORE tank failure occurs…
-Rise in pressure in tank that shows increased volume of fire or increased noise level or bubble/blistering….WITHDRAW TO SAFE AREA.
Ordinarily no attempt should be made to move a tank involved in a fire. Usually little would be gained in reducing the hazard.
However, if specific conditions
develop that make it desirable to move the tank, it should be moved in an UPRIGHT position.
LEAKING GAS/NO FIRE
Water spray is effective in dispersing LP gas vapor. It should be used as soon as possible, directing the spray stream across the normal vapor path and dispersing
the vapor to a safe location.
If water spray is not effective in dispersing the LP gas vapor, then heavy streams of water should be used from a safe distance.
f the tank area is involved in a fire, immediately locate where the tank relief valve discharges and keep clear of this area. Should the relief valve function and discharge gas, the resulting discharge and possible fire could harm
personnel. Direct water fog on the tank’s outer surface to keep it cool from the heat or flame impingement
The discharge point of the relief valve on passenger cars are positioned within 45 degrees of vertical. This could be located on top of the trunk or in the rear quarter panel or possibly off the rear bumper
-If you cannot find the discharge point of the relief valve on the exterior of the vehicle, under cover of water fog open the trunk to get at the fuel tank, then turn off the supply valve and apply water to the container.
CNG CYLINDER..
CNG CANNOT BLEVE (NOT LIQUID)
CAN’T STOP FLOW OF GAS (LET IT BURN)
-cooling may cause relief valve to NOT ACTIVATE
UPS AND SANITATION USE….
CNG VEHICLES
EVERY vehicle POWERED BY CNG REQUIRING FD PERMIT…
WARNING PLACARD FROM AND REAR BUMPER
“1971”
LPG (1075 PLACARD)
CNG CYLINDERS..
PRESSURED TO 3000 LBS
-FUSIBLE PLUG PRESSURE RELIEF DEVICE (NOT A VALVE WE CAN SHUT…BUT A PLUG)
SUBJECT TO FAILURE NOT BLEVE
LEAK IN CNG…
-emergency shutoff (sign/ 1/4 turn)
-each cylinder turn clockwise
FIRE IN CNG…
-extinguish STOP FLOW OF GAS
**UNABLE to close shutoff or cylinders……flow of gas cannot be stopped…DO NOT EXTINGUISH FIRE AND DO NOT APPLY WATER…COOLING RELIEF DEVICE WILL RENDER INACTIVE **
-CONTROLLED BURN
MAY TAKE 10-15 MINUTES for high pressure relief valve to subside…30 minutes full…
-minimum safe perimeter 100 FEET AROUND VEHICLE
-PRD on both ends VENT UP AND SIDEWAYS
-additional l PRDS ON BOTTOM OF REGULATOR
-ALWAYS APPROACH ON 45 DEGREE ANGLE
-DO not approach front or sides
NO PLACARDS…
TRANSPORTER NAME /LICENSE/STATE
SAME FOR RAILROADS.
-substance by name…relay phonetically to dispatch
DOT requires placards only on trucks transporting
OVER 1000 pounds
Do not use water on any substance
FUMING until identified
DERAILED TANK CAR..
CALL HAZMAT, IN ALL CASES
ASBESTOS…
–not a hazard UNLESS MATERIAL IS FRIABLE
-INHALATION MAJOR ISSUE
ALL GOOD LT. STANDARD OPERATION PROCEDURE REQUIRES CAREFUL MANAGEMENT
-ALKALINES
-COMPRESSED GASES
-FLAMMABLE LIQUIDS
-FLAMMABLE SOLIDS
-OXIDIZERS
-POISONS
-RADIOACTIVE
-CORROSIVES
-
CO..
-colorless/odorless/tasteless
-NON IRRITATING
-TOXIC
-FLAMMABLE GAS
-AUTO IGNITION 1128 FARENHEIT
-LOWER EXPLOSIVE 12.5 %
- UPPER EXPLOSIVE 74 %
(natural gas 5 %- 15 %)
-CO SLIGHTLY LIGHTER THEN AIR …disperse evenly through the room (natural gas..significantly lighter )
TWO METERS…each battalion /ladder/engine
–AFFIXED TO HT on radio strap ABOVE REMOTE MIC
-LADDER COMPANY –recommended 2nd meter to OV
-ENGINE - AFFIXED TO O2 BAG
BATTAION 2ND METER –AIDE
REPLACEMENT CO METER…
CONTACT HAZMAT OPS (not Battalion )
