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| Telephone: |
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847-742-7006 |
| FAX: |
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847-742-1315 |
| Postal address: |
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201 N. Spring St., Elgin IL 60120 |
Security specialist and
locksmiths
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The following is an explanation of the
Underwriter’s Laboratories’ fire resistant container testing
procedures on the Class 350°F, one hour and Class 350°F two hour Fire
Labels.
U.L. Label/Class 350°F-one hour and Class 350°F-two hour. The safe
will maintain an interior temperature less than 350°F when exposed to
fire for a period of one hour at 1700°F or for a period of two hours at
1850°F. Safe must successfully undergo all other requirements for the
Fire Endurance Test, Explosion Hazard Test and the Fire/Impact Test as
stated below.
Fire Endurance Test
After heat sensors and paper are placed inside the safe, the unit is
locked and exposed to a uniformly distributed fire. The furnace is
regulated to reach a maximum temperature of 1700°F for a period of one
hour, or 1850°F for two hours, then allowed to cool without opening the
furnace. The interior temperature is recorded throughout the test and
during the cooling period until a definite drop is shown and must never
exceed 350°F.
Once cooled, the unit is opened and examined for usability. The units
locking mechanisms and parts fastenings are examined for security and the
interior examined for visible evidence of undue heat transmission
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Explosion Hazard Test
The safe is locked and placed into a furnace preheated to 2000°F. This
temperature is maintained for 30 minutes (2 hour test is 45 minutes) and
if no explosion results, the unit is allowed to cool without opening the
furnace doors. Once cooled, the unit is opened and examined for usability.
The units locking mechanisms and parts fastenings are examined for
security and the interior examined for visible evidence of undue heat
transmission. |
Fire Impact Test (Manufacturer’s Option)
After the explosion hazard test the safe is removed from the furnace
and within two minutes is dropped 30' onto a riprap of brick on a heavy
concrete base. After impact the unit is examined for deformation, rupture
of parts, damaged insulation and any other openings into the interior of
the unit. Once cooled, the unit is inverted and reheated to 1550°F for a
period of 30 min. (2 hour test: 45 min. at 1638°F).
Once cooled, the unit is opened and examined for usability. The units
locking mechanisms and parts fastenings are examined for security and the
interior examined for visible evidence of undue heat transmission.
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Information courtesy of AMSECUSA. |
