CARGO TANK MOTOR VEHICLES

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CARGO TANK MOTOR VEHICLES
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DOT Definition

• A tank intended primarily for the carriage of
  liquids or gases
• A tank that is permanently attached to or forms
  any part of any motor vehicle
• Is loaded of unloaded without being removed from
  a motor vehicle
• Is not fabricated under a specification for
  cylinders, portable tanks, tank cars, or
  multiunit tank car

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MC vs. DOT

• MC 306 Certified before August 31, 1995 and will
  have spec. plate
• DOT 406 Certified on August 31, 1995 or later
  will have certification plate

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Specification Plate and Certification Plates

• Helps with the identification of tank type by
  providing specific information.
• Spec. Plates located on passenger side front of
  tank.
• Certification Plates located on drivers side
  front of tank.

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VEHICLE MFG.
DALLAS TANK TRUCK CO.
1/97
DATE MFR.
BBH 04677
MFG. S/N
306 AL
1/97
DOT MC
CERT.
0
180
DESIGN PRES.
PSIG AT
oF MAX
5
TEST PRES.
PSIG
3
DATE
5454-0
5454-H32
HEAD MATL
SHELL MATL
3400-2000-1100
CAP. BY COMPT. F/R
U.S. GAL.
9200
2700
TOTAL
7.5
64,000
MAX. LOAD
LBS
AT
LBS./GAL. MAX
1.5
0.5
LMT. LD
PSIG
UNLD
PSIG
GPM
GPM
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Multipurpose Plates

• Is in addition to spec. or certification plate
• Is color coded along with fittings
• MC-306/DOT-406Red
• MC-307/DOT407Green
• MC-312/DOT-412Yellow
• Non-specification cargo tankBlue
• Identifies the specification under which the
  cargo tank is operated
• Common multipurpose configurations are
• MC-306/DOT-406 / MC-307/DOT-407
• MC-307/DOT-407/MC-312/DOT-412 (Nalco uses this)

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MC-306/DOT-406

• Most oval cross section
• Non pressurized - less than 3 psi (406 -5 psig)
• Usually single shell aluminum construction
• Some older tanks may be constructed of steel

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MC-306/DOT-406
Generally 9,000 gallons Maximum capacity
Products And Hazard Class
Gasoline Class 3 Diesel Class 3
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Emergency shut-off

• Air
• Manual
• Fusible links (fail at a maximum of 250oF)

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MC-307/DOT-407

• Circular cross section
• Low pressure (up to 40 psi)
• Double shell construction with insulation is most
  common
• Some insulated tanks may not appear circular

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MC-307/DOT-407

• Usually one to two compartments
• Spec. plate identifies number of compartment
• Overturn protection
• Generally 6,000 to 7,000 gallons maximum capacity

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MC-307/DOT-407

• Products And Hazard Class
• Flammable Combustible Liquids 3
• Mild Corrosives 8
• Poisons 6

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MC-307/DOT-407
Horseshoe shape
Single Work Platform
Single Outlet Piping
?40 psig Vapor Pressure
NFPA Objective 4-2.3.2
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MC-307/DOT-407
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MC-312/DOT-412

• Circular cross section
• Smaller diameter than DOT 407
• External reinforcement ribs
• May be found in double shell construction
• Usually single compartment

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MC-312/DOT-412

• Overturn protection and splash protection at dome
  cover/valve location
• Generally 5,000 to 6,000 gallons capacity

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MC-312/DOT-412

• Products and Hazard Class
• Corrosive and High Density Liquids
• Sulfuric Acid (15.34 lb.) Class 8
• Nitric Acid (12.54 lb.) Class 8
• Sodium Hydroxide (17.76 lb.) Class 8
• Poison Class 6

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MC 312(DOT 412)
Rounded Ends
Small DiameterCigar Shape
Exterior Stiffner Rings
35 - 50 psig Working Pressure
NFPA Objective 4-2.3.2
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MC 331High Pressure Gas

• Circular cross section
• Rounded heads
• Design pressure 100 to 500 psi
• Single shell, non-insulated tank
• Upper 2/3 painted white or highly reflective color

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MC 331High Pressure Gas

• Capacity
• Bobtail
• 2,500 gallons
• Cargo Tank
• 11,500 gallons

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MC 331High Pressure Gas

• Products And Hazard Class
• LPG Class 2
• Anhydrous ammonia Class 2
• Chlorine 2 - 5.1

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MC 331
Bolted Manway
Large Hemisphere Ends
Up to 11,500 gal
Cage Around Piping
100 to 500 psig
NFPA Objective 4-2.3.2
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MC 338Cryogenic Liquid

• Well insulated thermos bottle design with flat
  tank ends
• Double shell tank with relief protection
• Often have vapors discharging from relief valve

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MC 338Cryogenic Liquid

• Product And Hazard Class
• Oxygen 5.1 (2)
• Hydrogen 2
• Helium 2
• Nitrogen 2
• Cryogenics exist as a liquid at - 130oF and below

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MC 338
Ends Normally Flat
5000 to 14,000 gal
Loading (Sometimes Located Here)
Loading/Unloading Station at Rear
23.5 to 500 psig design pressure
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Tube Trailer

• 2 to 20 Cylinders
• Cylinders 9 to 48
• Pressure 3,000 - 5,000 psi
• Maximum Capacity 180,000 cu ft.
• Max. Capacity in Canada 200,000 cu ft.

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Tube Trailer

• Product And Hazard Class
• Helium Class 2
• Hydrogen Class 2
• Oxygen Class 2

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Dry Bulk Carriers

• Capacity up to 1,500 cubic feet
• Carry Very Heavy Loads centrifugal
• force cause of many rollovers
• Uses air pressure for product transfer
• Static charges are a common hazard

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Dry Bulk Carriers

• Products And Hazard Class
• Ammonium Nitrate Fertilizer Class 5.1
• Cement Class 9
• Dry Caustic Soda Class 8

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Dry Bulk Carriers
Compressor Unit
Pneumatically Unloaded
Large Sloping V or W Shaped Bottom
Up to 1500 cu. ft.
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V or W Shape