Fireproof Safes

When a person is thinking about purchasing a safe or filing equipment, this person knows pretty much on what they want to store. Sometimes especially in the home people do not realize all what they would want to put away and save in case of a disaster.

Disasters meaning fire, tornado, and burglary, or whatever the case may be. There are when talking about safes there are 5 different classes of safes. These classes are as follows.

Class A Safes (this is used in a business, and also a home environment)= To qualify for the Underwriters’ Laboratories, Inc. “A” label, the safe must pass these tests. Fire Exposure Test, Drop or Impact Test, and Explosion Hazard Test.

Fire exposure test: A sp Fireecimen safe containing papers, records, etc., placed in a specially constructed testing furnace, must withstand four-hour exposure to heat reaching 2,000 degrees F. During this four-hour test the temperature within the safe cannot exceed 350 degrees F.

Another test takes place at the conclusion of the four-hour period. The fire is extinguished, and with the furnace still closed, the safe is allowed to absorb the intense heat of the refractory lining of the furnace until the entire mass eventually cools. The inside temperature of the safe is observed and recorded throughout the test by use of temperature-measuring devices. During this period the temperature inside the safe cannot exceed 350 degrees F. When the safe is opened, after cooling to normal temperature, the contents must not be charred, and must be entirely legible. This additional test – in which a safe may fail, due to improper quality or quantity of insulation, or to structural weakness – simulates a safe lying in the intense heat of the debris of a fire.

Drop or impact and explosion hazard test: A second safe of the same model is then subjected to sudden and intense heat for 30 minutes in a furnace preheated to 2,000 degrees F. If dangerous gases accumulate from the insulation during this period, they will explode, destroying the safe and its contents. If no explosion occurs, the furnace temperature is reduced to 1,550 degrees F. The safe remains in the furnace for an additional 30 minutes, during which time the furnace temperature is gradually increased to 1,700 degrees F. At the end of this one-hour period, the safe is removed, and, while red hot, is dropped 30 feet on a bed of broken rock, etc. Two minutes elapse between the time the safe is removed from the furnace and the time it is dropped. The safe is placed back in the furnace, regardless of its condition, bottom side up, and reheated for one hour at temperatures reaching 1,700 degrees F. The fire is then cut off, and the safe allowed to cool to normal temperature in the closed furnace, after which it is removed, opened and inspected. To pass the test, all papers inside the safe must be entirely legible and uncharred.

Class B Safes (this is used in a business, and also a home environment)= To qualify for the Underwrites’ Laboratories, Inc. “B” label, the safe must pass these tests: Fire Exposure Test, Drop or Impact Test, and Explosion Hazard Test.

Fire exposure test: A specimen safe containing papers, records, etc., placed in a specially constructed testing furnace, must withstand two-hour exposure to heat reaching 1,850 degrees F. During this two-hour test the temperature within the safe cannot exceed 350 degrees F.

Another test takes place at the conclusion of the two-hour period. The fire is extinguished, and with the furnace still closed, the safe is allowed to absorb the intense heat of the refractory lining of the furnace until the entire mass eventually cools. The inside temperature of the safe is observed and recorded throughout the test by use of temperature-measuring devices. During this period the temperature inside the safe cannot exceed 350 degrees F. When the safe is opened, after cooling to normal temperature, the contents must not be charred, and must be entirely legible. This additional test – in which a safe may fail, due to improper quality or quantity of insulation, or to structural weakness – simulates a safe lying in the intense heat of the debris of a fire.

Drop or impact and explosion hazard test: A second safe of the same model is then subjected to sudden and intense heat for 30 minutes in a furnace preheated to 2,000 degrees F. If dangerous gases accumulate from the insulation during this period, they will explode, destroying the safe and its contents. If no explosion occurs, the furnace temperature is reduced to 1,550 degrees F. The safe remains in the furnace for an additional 15 minutes, during which time the furnace temperature is gradually increases to 1,640 degrees F. At the end of this 3/4-hour period, the safe is removed, and, while red hot, is dropped 30 feet on a bed of broken rock, etc. Two minutes elapse between the time the safe is removed from the furnace and the time it is dropped. The safe is placed back in the furnace regardless of its condition, bottom side up, and reheated for on hour at temperatures reaching 1,700 degrees F. The fire is then cut off, and the safe allowed to cool to normal temperature in the closed furnace, after which it is removed, opened and inspected. To pass the test, all papers inside the safe must be entirely legible and uncharred.

Class C Safes (this is used in a business, and also a home environment)= To qualify for the Underwriters’ Laboratories Inc., “C” label, the safe must pass these tests: Fire Exposure Test, Drop or Impact Test, and Explosion Hazard Test.

Fire exposure test: A specimen safe containing papers, records, etc., placed in a specially constructed testing furnace, must successfully withstand one-hour exposure to heat reaching 1,700 degrees F. During this one-hour test, the temperature inside the safe must remain within the limit of 350 degrees F.

A further severe test takes place at the conclusion of the one-hour period, when the fire is extinguished, andwith the furnace still closed, the safe is allowed to absorb the intense heat from the refractory lining of the furnace until the entire mass eventually cools. Inside temperatures of the safe must remain within the limit of 350 degrees F. When the safe is opened, after cooling to normal temperature, the contents must not be charred, and must be entirely legible. This additional test – in which a safe may fail, due to improper quality or quantity of insulation, or to structural weakness – simulates a safe lying in the intense heat of the debris of a fire.

Drop or impact and explosion hazard test: A second safe of the same model is then subjected to sudden and intense heat for 30 minutes in a furnace preheated for 30 minutes in a furnace preheated to 2,000 degrees F. If dangerous gases accumulate from the insulation during this period, they will explode, wrecking the safe. If no explosion occurs, the safe is removed, and, while red hot, is dropped 30 feet on a bed of broken rock, etc. Two minutes elapse between the time the safe is removed from the furnace and the time it is dropped. Regardless of its condition, the safe is placed back in the furnace, bottom side up, and reheated for one-hour at temperatures reaching 1,550 degrees F. The fire is then cut off, and the safe allowed to cool to normal temperature in the closed furnace, after which it is removed and opened. The papers inside the safe must be entirely legible and uncharred.

Class D Safes (this is used in a business, and also a home environment)= Insulated safes bearing the class “D” label are capable of withstanding (1) a severe fire test for one-hour with temperatures reaching 1,700 degrees F while the interior temperature does not exceed 350 degrees F during or after exposure; (2) A sudden heating without producing and explosion.

Class 125 (this is used in a business, and also a home environment)= This is to store data, computer software, microfilm, and old home movies on reel to reel. You take the class “A” rating and add the 125 rating. The 125 rating is a safe that maintains an interior temperature less than 125 degrees F and an interior relative humidity less than 80%, when exposed to fire as per the Standard Time Temperature Curve for 2 hours to 1,850 degrees F. Successfully undergo all other requirements for the Fire Endurance Test, the Explosion Hazard Test, the Humidity Test and the Fire and Impact Test.