Module 9: Control Techniques - International Association of Fire ...
Module 9: Control Techniques - International Association of Fire ...
Module 9: Control Techniques - International Association of Fire ...
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IAFF Training for Hazardous Materials: Technician©<br />
Student Text<br />
Corrective Action for Cargo Tank Fittings<br />
Location <strong>of</strong> Leak Probable Cause Basic Repair Methods<br />
MANHOLE COVER<br />
Liquid or vapor leak around<br />
manhole cover<br />
FILL HOLE COVER<br />
Liquid or vapor leak around<br />
fill hole cover<br />
TOP MOUNTED<br />
SHUTOFF VALVE<br />
Liquid or vapor valve leaking<br />
Liquid or vapor valve leaking<br />
at tank outlet<br />
BOTTOM OUTLET<br />
VALVES (internal or<br />
external)<br />
Liquid leak at flange between<br />
tank and valve<br />
Liquid leak at end <strong>of</strong> <strong>of</strong>floading<br />
pipe (s)<br />
Loose clamp ring<br />
Defective gasket<br />
Not securely closed<br />
Defective gasket<br />
Valve not completely closed<br />
Valve not seated<br />
Defective seat or threads on valve<br />
Loose flange bolts/nuts<br />
Defective gasket<br />
Internal valve not properly seated<br />
Broken internal valve<br />
Tighten bolt<br />
To be handled by a cargo tank<br />
specialist<br />
Check for zero pressure, then<br />
open and re-close (do not if the<br />
tank is on its side); or<br />
Tighten wing nuts or apply cover<br />
clamp<br />
To be handled by cargo tank<br />
specialist<br />
Close valve<br />
Tighten valve<br />
To be handled by cargo tank<br />
specialist<br />
Tighten valve bolts/nuts<br />
To be handled by cargo tank<br />
specialist<br />
Open and re-close valve<br />
To be handled by cargo tank<br />
specialist<br />
9-36 <strong>Module</strong> 9: <strong>Control</strong> <strong>Techniques</strong>
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