UL 72:2015 free download

UL 72:2015 free download Tests for Fire Resistance of Record Protection Equipment
5 General
5.1 The descriptions of certain tests include reference to ″the usability of the contents.″ Contents employed in tests of record protection equipment as specified herein are to be of material considered common newsprint and coated and uncoated magazine paper. The uncoated paper is to have a surface pH of less than 7.0.
5.2 The contents of record protection equipment shall not be adversely affected by temperature, humidity, or chemical off-gasing that could cause them to be unusable. The contents are considered to be usable after tests if able to withstand ordinary handling; that is,
a) They do not crumble or fall apart or adhere to one another (stick together) such that they are incapable of being separated without defacing or rendering papers useless during removal and examination and
b) They are legible without the use of supplemental devices or aides of any kind. 5.3 Insulation used in record protection devices shall be of material that retains its heat-insulating properties.
6 Fire Endurance Test 6.1 General
6.1 .1 Class 350 record protection equipment shall withstand the fire endurance test for the classification period desired by preventing the interior temperature from exceeding the rated temperature during the period of fire exposure and during the cooling period after the fire exposure; without destroying the usability of the contents; and without developing conditions indicating disintegration of parts or materials likely to affect the tightness of closure or the insulation.
6.1 .2 Class 1 25 and 1 50 record protection equipment shall withstand the fire endurance test for the classification period desired by preventing the interior temperature from exceeding the rated temperature during the period of fire exposure and during the cooling period after the fire exposure, and without developing conditions indicating disintegration of parts or materials likely to affect the tightness of closure or the insulation. In addition, the interior relative humidity shall not exceed 85 percent for Class 1 50 equipment and shall not exceed 80 percent for Class 1 25 equipment during both the fire-exposure period and during the cooling period until the interior temperature has decreased to 1 20°F (49°C) or a temperature decrease of 4°F (2°C) has occurred if the interior temperature remains at less than 1 20°F for the duration of the test.
6.1 .3 Representative samples of each line of equipment are to be selected for test.
6.1 .4 For fire safe, if a given line of equipment differs only in size, and not in such details as wall thickness, hinge construction, latch bolts and number of doors, the largest size is to be selected for test. Intermediate sizes may be selected for test if the line includes a relatively large number of sizes or if the interior dimensions vary from those of the largest unit to result in the reduction of the volume by more than 50 percent.