Module 9: Control Techniques - International Association of Fire ...

Student Text IAFF Training for Hazardous Materials: Technician©
Control Techniques
for Tank Cars
Damage assessment and repair on tank cars (just as on
cargo tanks) should never be attempted by untrained personnel.
The information in this section is provided to help
you understand—not perform—procedures for controlling
tank car leaks.
You must receive additional training in this area before you
attempt to control leaks in tank cars.
Inspecting and Repairing
Damaged Fittings
Most unintentional releases of hazardous materials occur in
non-accident situations as a result of improperly secured
valves, bad gaskets, overfilled cars, other unsecured fittings,
and venting from safety relief devices. Whenever a
release occurs, you must work with the railroad to determine
the material involved, the origin and cause of the
release, and any potential problems. In addition, control
activities should never be taken without proper training and
appropriate personal protective equipment.
Once you identify the product involved, the source of the
release, and the personal protective equipment needed, you
can begin considering control measures. Many releases
associated with fittings can be stopped simply by tightening
a valve or fitting using hand tools that are readily available.
The most basic control measures for stopping releases from
fittings include:
• If open, close it (clockwise to close)
• If loose, tighten it (clockwise to tighten)
• If missing (but available), replace it
The tables on the following pages describe, in more detail,
the likely locations of leaks, probable causes for these
leaks, and basic repair methods.
Module 9: Control Techniques 9-45