UL 1275:2021 free download

UL 1275:2021 free download STANDARD FOR SAFETY Flammable Liquid Storage Cabinets
8.9 The control station is to be 10 ft minimum (3.0 m minimum) from the test enclosure.
8.10 The floor is to be covered with a bed of cerawool ® to protect the concrete. The test sample is to be placed in the test enclosure with the test sample doors facing the long side of the test enclosure wall that has three test burners. The test sample is to be centered in the test enclosure. The sample doors are to be closed and in a locked position. The burners are to be 6 in (152.4 mm) from the cabinet walls. The openings under the enclosure walls are to be blocked with cerawool ® to prevent drafts from affecting the flame and to improve the control of the heat applied to the test sample. NOTE: Cerawool is a registered trademark of Johns-Manville corporation.
8.11 The air temperature 6 in (152.4 mm) from the test sample is to be measured by six No. 20 gauge chromel-alumel ® thermocouples inserted in nominal 3/16 in ID (4.8 mm ID) inconel ® sheaths. The two thermocouples that measure the temperature of the front of the test sample are to be evenly spaced horizontally and at the vertical midpoint of the sample. The thermocouple locations for the back of the sample are to be as described for the front. The thermocouple for each side is to be located in the center of the sample side. NOTE: Alumel is a trademark of concept Alloys, Inc. Inconel is a registered trademark of Special Metals corporation.
8.12 The test time is started with the pilot ignition. The pilot is to remain lit for 2 min while the gas flow from the main burners is started. After 2 min the pilot pipe valves are to be closed. The gas is to continue to flow for 8 min.
8.13 The test enclosure gas supply is to be adjusted so that the fire is well distributed over the exposed surfaces of the test sample and regulated to temperatures in accordance with the standard time- temperature curve for 10 min [1000 °F (538 °C) at 5 min and 1300 °F (704 °C) at 10 minutes] as specified in the Standard for Fire Tests of Door Assemblies, UL 10B, or the Standard Method for Fire Tests of Door Assemblies, CAN/ULC-S104. 8.14 The fire is then extinguished immediately after the 10 min test period by shutting off the gas supply. When shutting off the gas supply does not extinguish the fire, non-destructive suppression methods are to be used, such as halon or carbon dioxide. The test sample is to cool without opening the test enclosure.
9 Sump Leakage Test
9.1 A storage cabinet shall not have external leakage following the spill and drainage portion of this test, 9.2, or during the containment portion of this test, 9.3.
9.2 A representative cabinet with an integral or removable shelf installed shall be placed on a smooth horizontal surface. A quantity of water sufficient to fill the sump to a depth of 2 in (50.8 mm), with a maximum amount of 5 US gal (18.9 liters), is to be used. A container is to be fitted with a 1/4 in (6.4 mm) valve. The water shall be released from a container at any location inside the cabinet and the water shall drain to the sump for 1 h. The cabinet doors are to be closed during this test.
9.3 After evaluating the cabinet for external leakage as indicated in 9.2 the cabinet’s sump is to be filled with heptane to a depth of 2 in (50.8 mm) for 24 h. 10 Cyclic Endurance Test 10.1 The storage cabinet self-closing door mechanism shall be installed in accordance with the manufacturers instructions and shall be tested as described in 10.2 – 10.4. Following endurance cycling of the cabinet doors, the doors shall open and close as intended and the latch shall engage.