UL 2080:2000 pdf download – Fire Resistant Tanks for Flammable and Combustible Liquids.
8 Spill Containers
8.1 Spill containers, when provided, shall comply with applicable instaiiation requirements. When these accessories are to be installed in the field, each fill opening shall be marked as indicated in 31.1(i).
8.2 Spill containers shall have a minimum 5 gallon (20 I) capacity.
8.3 Spill containers shall be constructed o( non-combustible material.
8.4 A drain valve, or other means to keep the spill container empty, shall be provided.
8.5 A lid shall be provided for each spill container. The lid shall be constructed to prevent rain and debris
from entering the container.
9 Supports
9.1 When provided, tank supports shall be constructed in accordance with the applicable requirements in the Standard for Steel Aboveground Tanks for Flammable and Combustible bquids, UL 142. Tanks that are not provided with integral supports shall be marked as specified in 31.3.
10 GroundIng
10.1 A means shall be provided for the attachment of at least two grounding conductors sized in accordance with Installation of bghtning Protection Systems, NFPA 780.
10.2 Instructions as specified in 33.1 shall be provided to detail all proper grounding connections.
11 Samples and Test Selection
11.1 General
11.1.1 Unless otherwise indicated, samples subjected to the following tests shall be empty and shall include construction features, materials, and workmanship that are representative of those used in tanks produced at the manufacturer’s facility.
11.1.2 A single tank sample as described in 11.2.1 — 11.2.8 shall be subtected to all of the following tests in Sections 12— 15.
11.1.3 At the conclusion of the tests specified in 11.1.2, the same sample, when determined to be usable, may be subjected to the remaining tests in Sections 17 —21, 23, and 24. If not, a new sample shall be used br the remaining tests. Tests specified in the Vehicle Impact Test. Section 19, and the Projectile
Test, Section 20, are optional.
11.1.4 The following tests are riot required for tanks that use a minimum of six inches of concrete as the insulation or an external steel wall that provides protection for the insulation:
a) The Ball Impact Test, SectIon 15 and
b) The Environmental Exposure and Small Scale Fire Test. Section 22.
11.2.7 Not less than two thermocouples are to be installed on each structural support that holds the tank
12 inches (30.5 cm) or more above grade.
11.2.8 The thermocouples are to be fabricated from minimum 0.032 inch (0.8 mm) diameter (No. 20 B a S gauge) Type K, chromel•alumel wires or equivalent having a time constant of 2 seconds or less.
11.3 Environmental exposure and small scale fire test samples
11.3.1 Test samples are to consast of 2-foot by 6-inch by 6-Inch (610- by 152- by 152-mm) structural steel tubes with 3/16-inch (4.8-mm) wail thickness. The steel tubes are to be provided with steel caps and covered with the insulation material in the minimum thickness being investigated. Figure 11.1 shows the details of a test sample prior to application of the insulation material.
11.3.2 The temperatures of the test sample are to be measured by five Type K thermocouples having a time constant not greater than 2 seconds and located within the steel tube as shown in Figure 11.1. The thermocouples are to be fabricated by fusion-welding the twisted ends of 0.064-inch (1.6-mm) diameter (No. 14 B & S gauge) chrornel-alumel wires having a time constant of 2 minutes or less, and mounting the wires in porcelain insulators. The thermocouple assembly is to be inserted through a standard weight, nominal 1/2-inch (12.7-mm) iron, steel, or incoriel pipe. The end of the pipe from which the welded junction protrudes is to be open. The thermocouple lunction is to protrude 1/2 inch (12.7 mm) from the open end of the pipe.
11.3.3 Three as received samples are to be subjected to the furnace environment as described in 17.2.1. The thickness of the insulating material shall be such that the time at which the test sample reaches an average temperature rise of 800°F (430°C), and no individual temperature nse greater than 1000°F (540°C), is not less than 50 minutes nor greater than 90 minutes after the beginning of the test. This time is to be defined as the control period. It necessary, the thickness of the protective material is to be varied from one test sample to another to determine the thickness necessary for compliance with this requirement. This thickness, once determined, is to be the thickness applied to subsequent test samples.