5- HazMat- Identify Potential Hazards- Containers Flashcards
There are FOUR major types of containers:
-Pressure Containers
-Cryogenic Containers
-Liquid-Holding Containers
-Solids-Holding Containers
Per NFPA definitions, low pressure storage tanks have operation pressures from __ to __ psi. Pressure vessels (including many large cryogenic liquid storage tanks) have pressures of __ psi or greater.
Low Pressure = 0.5 to 15 psi
Pressure Vessels = 15 psi or greater
Pressure containers can experience any type of breach, although releases from _______ and/or damaged fittings are most common.
Pressure Relief Devices
Pressure relief devices are typically set to activate at ___% of the tank’s TEST PRESSURE.
75% of tank’s TEST PRESSURE
_____ is a function of some cryogenic containers and may not indicate a system failure.
Venting
Cryogenic containers can experience any type of breach, although releases from ______ and/or damaged fittings are most common.
Pressure Relief Devices
Cryogenic containers release cold liquids or vapors that rapidly ____ into expanding gases.
Boil
Most solids-holding containers will be damaged via mechanical stressors rather than the physical properties of the materials contained in them. EXCEPTIONS include:
*2 answers
-Reactive Materials (oxidizers, peroxides, explosives)
-Water Reactive Materials
Cryogenic liquid storage tanks (bulk facility) may have pressures of __ psi or greater, with capacities from ___ to ____ gallons.
15 psi or greater
Capacities from 300 to 400,000 gallons
*some new LNG tanks have a capacity of 30 to 60 millions gallons
Low pressure storage tanks (bulk facility) have operating pressures from ___ to ___ psi.
Types of low pressure storage tanks include the following 3:
0.5 to 15 psi
Types include: Dome Roof Tanks, Spheroid Tanks, Noded Spheroid Tanks
Low pressure storage tanks (bulk facility) typically contain flammable and combustible liquids with low vapor pressures, such a solvents. A first priority at incidents involving these containers is:
Eliminating ignition sources
The maximum pressure under which an atmospheric tank (bulk facility) is capable of holding its contents is ___ psi.
0.5 psi
_____ tanks (bulk facility) typically hold liquids, most often hydrocarbons.
Nonpressure/atmospheric
Treat interiors of bulk nonpressure/atmospheric tanks as:
Confined spaces.
_____ storage tanks are typically constructed of steel, fiberglass, or steel with a fiberglass coating. They also usually contain liquids (typically gasoline) and are classified as low pressure or nonpressure/atmospheric.
Underground
Features of underground storage tanks include more than __ % of their surface areas being underground.
More than 10%
Even highway vehicles without placards may be carrying quantities of hazardous materials, such as fuel in _______.
Saddle Tanks
Cargo tank specification and name plates provide information about the standards to which the container/tank was built. These plates are usually found on the ____ side of the tank, between the ____ and the _____.
Roadside/Driver’s side
Between the front edge of the tank and the dolly leg (landing gear).
When it comes to cargo tank trucks, there are two specifications in use, the _____ standards and the ____ standards. Each is then designated by a 3 digit number identifying the specification.
Motor Carrier (MC) standards and DOT/TC standards
Nonpressure cargo tank trucks are also known as MC___ or DOT/TC___ cargo tanks depending on the specifications to which they were built.
MC-306 or DOT/TC-406
Nonpressure cargo tank trucks (MC-306 or DOT/TC-406) typically have a pressure of less than __ psi.
The maximum capacity of these tanks is _____ gallons in the US, with a typical capacity range between 1,500 to 10,000 gallons.
They almost always carry flammable/combustible liquids.
Typically tanks pressure is less than 4 psi
Maximum capacity is 14,000 gallons
Low pressure chemical tank trucks are also known as MC ___ or DOT/TC ___ cargo tanks depending on the specifications to which they were built.
These tanks trucks typically have a pressure of __ to __ psi, with typical capacities of ____ to ____ gallons.
They carry liquids (including flammable/combustible liquids), mild corrosives, and some toxics/poisons.
MC-307 or DOT/TC-407
Typical pressure of 25 to 35 psi
Typical capacities of 5,500 to 7,000 gallons
Corrosive liquid tank trucks are also known as MC ___ or DOT/TC ____ cargo tank trucks depending on the specifications to which they were built.
These tank trucks typically have a pressure range of __ to __ psi and may have a much higher maximum allowable working pressure (MAWP).
Typically tank capacities are from ___ to ___ gallons.
Usually they only have ONE compartment.
MC-312 or DOT/TC-412
Typical pressure range of 35 to 55 psi
Typical capacities of 3,300 to 6,300 gallons
High pressure tank trucks are also known as MC ___ or TC ___.
These tank trucks have pressures typically between ___ to ___ psi.
They have typical capacities between ___ and ___ gallons.
They have a single steel compartment and transport liquefied gases, high pressure vapor liquids, and highly hazardous materials.
MC-331 or TC-331
Pressures typically between 100 to 500 psi
Capacities typically between 3,000 to 11,000 gallons
MC-331 or TC-331 cargo tank trucks (high pressure) have emergency shutoffs in the ____ and ____ of the truck.
Left front AND right rear
Per the ERG, if an MC-331 (high pressure) is involved in a fire, the INITIAL evacuation distance is ____ in all directions because they may BLEVE.
One Mile
Cryogenic tank trucks are also known as MC ___, TC ___, or TC ____ cargo tanks.
They can have pressures less than __ psi and up to ___ psi.
They can have capacities of ____ to ____ gallons.
MC-338, TC-338, or TC-341
Pressures can be less than 25 psi and more than 500 psi
Capacities of 8,000 to 10,000 gallons
MC-338, TC-338, or TC-341 (cryogenic tank trucks) have emergency shutoffs in the ____ and the ____ of the trucks.
Per the ERG, if they are involved in a fire, the INITIAL evacuation distance is ____ in all directions because they may BLEVE.
Emergency shutoffs in the left front and right rear
Initial evacuation distance is 1 mile in all directions