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Tank Vehicles CDL

Tank endorsement for CDL
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Checking a Tank before driving
check the body and shell for dents or leaks
check the intake,discharge, and cut-off valves..
Make sure valves are in the correct position before loading, unloading, or moving the vehicle.
checks pipes connections and hoses especially around joints
check manhole covers and vents --make surethe covers have gaskets and they close correctly
Keep the vents clear so they work correctly
Check Special Purpose Equipment
Vapor recovery kits
Grounding and bonding cables
Emergency shut off systems
Built in Fire Extinguisher
Never drive a tank vehicle with .....
open valves or manhole covers
How to take curves with Top Heavy Tankers
Slow, well below the posted speed limit
Danger of Surge
Results from a partially filled tank...movement can have bad effects on handling
Bulkheads
Some tanks are divided into several smaller tanks, when loading and unloading the smaller tanks...pay attention to weight distribution Dont put too much weight on the front or rear of the vehicle
Baffled Tanks
Baffled Tanks have bulkheads with holes to let the liquid flow through. Helps to control the forward and backward surge. Side to Side surge can still occur and cause rollover
Un-baffled Tanks
AKA "smooth bore" tankers...have nothing inside to control flow of liquid...usually for transporting food,,,milk for example
Outage
Never haul liquids completely full..Liquids expand when they get warm and each liquid expands differently this is called outage...know the outage requirement for the liquid your hauling
Full Tanks
full tanks of a dense liquid such as some acids may exceed legal weight limiits to know the legal amount to haul you must know
amount the liquid will expand in transit
weight of the liquid
legal weight limits
Controlling Surge in Emergency
Use controlled or stab braking
Stopping Distance
Wet roads double the normal stopping distance
Empty Tanks vehicles take longer to stop than full ones