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UL testing for PUMP TANK EXTINGUISHERS
1 Operation Test
1.1 The minimum range of an extinguisher when conditioned for 24 hours at the minimum operating temperature, 70 and 120�F, is 30 feet. An extinguisher shall discharge a minimum of 95 percent of its charge when conditioned at the three previous temperatures. The discharge is to be nonpulsating and have good carryover. Unit is to be operated at 60 double strokes per minute.
2 Pump Operation Test
2.1 The pump of the extinguisher is to be operated for 1000 double cycles using water. The pump shall operate smoothly each time, and no excessive force shall be required for any cycle.
3 Pump Pressure Test
3.1 A tank shall show no signs of leakage when subjected to an internal hydrostatic pressure of 25 psi for 1 minute.
3.2 All hose and hose assemblies shall show no signs of leakage when subjected to an internal hydrostatic pressure of 25 psi for 1 minute.
4 One-Year Leakage Test
4.1 A sample shall show no sign of leakage when allowed to remain at room temperature for 1 year. The samples are to be charged as they would be in production.
5 Rough Usage Test
5.1 A charged sample is to be tested. The sample is to be dropped three times from a height of 3 feet. Each drop is to strike the concrete at a different edge, if possible. The distance is to be measured from the concrete surface to the handle. In addition, plastic tanks are to be conditioned at the minimum storage temperature for 24 hours prior to testing. Samples shall show no signs of cracking.
6 Exposure to Extinguishing Agent Test
6.1 Samples are to be charged with distilled water and conditioned for 30, 90, and 180 days at 87�C. After the conditioning periods, the samples are to be examined for any signs of deterioration. No deterioration is to be present. Specimens cut from plastic conditioned samples are to be subjected to Tensile Strength (ANSI/ASTM Method D638 ), using Type I specimens and a crosshead speed of 0.2 inch per minute, and Tensile Impact Energy (ANSI/ASTM Method D1822) Tests. The results are to be compared to the results obtained from as-received samples. Exposed samples are to have a value not less than 85 percent of as-received values.
6.2 Samples are to be charged with antifreeze solution and conditioned as in 8.1. After this exposure, the plastic samples are to be subjected to the Rough Usage Test as described in this outline. Specimens cut from plastic conditioned samples are to be subjected to Tensile Strength (ASTM Method D638) using Type I specimens and a crosshead speed of 0.2 inch per minute and Tensile Impact Energy (ASTM Method D1822 ) Tests. The results are to be compared to the results obtained from as-received samples. Exposed samples are to have a value not less than 85 percent of as-received values.
7 Salt Spray Corrosion Test
7.1 An extinguisher and its bracket or mounting hook, if any, shall be subjected to a 500 hour salt-spray exposure as described below. Examination after exposure shall show compliance with the following:
a) The extinguisher shall be capable of being operated and recharged in a normal manner,
b) Any corrosion-resistant coating (such as paint) shall remain intact and shall adhere to the surface so as not to be removable (when removal exposes a material subject to corrosion) by such action as washing or rubbing with a thumb or fingernail,
c) Dissimilar metals in contact or close proximity with one another shall be provided with a corrosion protection system, so that there is no evidence of galvanic corrosion,
4. The extinguisher shall not show any incipient corrosion on metal surfaces having no protective coating or paint.
7.2 For the purposes of this requirement, the term "incipient corrosion" is defined as the first evidence of the destruction of the integrity of the surface of the material.
7.3 The test specimens are to be supported vertically and exposed to salt spray (fog) as specified by ANSI/ASTM B117. The apparatus used for salt-spray exposure is to consist of a fog chamber, 48 by 30 by 36 inch inside dimensions, having a salt solution reservoir, a supply of suitably conditioned compressed air, a dispersing tower for producing a salt fog, specimen supports, provision for heating the chamber, and necessary means of control. The dispersion tower is to be located in the center of the chamber and is to be supplied with salt solution and with warmed, humidified air at a pressure of 17 to 19 psig, so as to disperse the salt solution in the form of a fine mist or fog throughout the interior of the chamber. The temperature within the chamber is to be maintained between 92 and 97�F (33.3 and 36.1�C). Condensate accumulation on the cover of the chamber is not to be permitted to drop on the test specimens, and drops of the solution which fall from the specimens are not to be recirculated but are to be removed through a drain located in the floor of the chamber.
7.4 The salt solution is to consist of 5 percent by weight of common salt (sodium chloride) and distilled water.
8 Handle Strength Test
8.1 A sample is filled to its nominal capacity with water. A rope is attached to the balance point of the handle leaving 12 inches of slack rope. Three drops are made on the sample during which it was allowed to fall freely through the 12 inches permitted by the rope. There is to be no sign of the handle cracking or loosening.
9 Accelerated Air Oven Aging Test (Plastic Only)
9.1 Whole tanks (if possible) and specimens cut from samples are to be subjected to 30, 90, and 180 day aging at 87�C. The specimens to be aged are to be supported in a full-draft, circulating-air oven that has been preheated at full draft. Samples are to be supported so as not to touch one another or the sides of the oven. The samples are to be aged at full draft and then allowed to cool in air at 73.4 �3.6�F (23.0 �2.0�C) for at least 24 hours before any test or dimensional check is conducted. As used in this test, the term "full draft" refers to the oven being used with inlet and outlet vents open and the air-vent damper control being adjusted to the maximum setting so as to provide 250 to 350 air changes per hour.
9.2 There is to be no cracking after the exposure. Following air-oven aging, samples are to be subjected to both Rough Usage and Hydrostatic Pressure Tests as described in this outline. Specimens cut from aged samples are to be subjected to Tensile Strength (ANSI/ASTM Method D638), using Type I specimens and a crosshead speed of 0.2 inch per minute, and Tensile Impact Energy (ANSI/ASTM Method D1822) Tests. The results are to be compared to the results obtained from as-received samples. Exposed samples are to have a value not less than 85 percent of as-received values.
10 Light and Water Test (Plastics Only)
10.1 Specimens cut from containers are exposed for 30 days to ultraviolet light from two single enclosed carbon arc lamps, using the apparatus described below. Water is automatically sprayed onto the specimen at predetermined intervals.
10.2 The ultraviolet light is to be obtained from two stationary enclosed carbon-arc lamps. The arc of each lamp is to be formed between two vertical carbon electrodes, 1/2 inch (12.7 mm) in diameter, located at the center of a revolvable vertical metal cylinder, 31 inches (787 mm) in diameter and 17-3/4 inches (450.9 mm) in height. Each arc is to be enclosed with a No. 9200-PX clear Pyrex glass globe. The samples are to be mounted vertically on the inside of the revolvable cylinder, facing the lamps, and the cylinder continuously revolved around the stationary lamps at one revolution per minute. A system of nozzles is to be provided so that each sample, in turn, is sprayed with water as the cylinder revolves. During each operating cycle (total of 20 minutes) each sample is to be exposed to the light and water spray for 3 minutes and to the light only for 17 minutes. The air temperature within the revolving cylinder of the apparatus during operation is to be 145�9�F (63 �5�C).
10.3 After the exposures, the specimens are allowed to condition at 23�C (73�F) and 50 percent relative humidity for at least 24 hours before testing. The exposed specimens shall show no cracking, crazing, or other visible signs of degradation. Specimens cut from conditioned samples are to be subjected to Tensile Strength (ANSI/ASTM Method D638), using Type I specimens and a crosshead speed of 0.2 inch per minute, and Tensile Impact Energy, (ANSI/ASTM Method D1822) Tests. The results are to be compared to the results obtained from as-received samples. Exposed samples are to have a value not less than 85 percent of as-received values.
11 Environmental Stress Cracking Test (Plastic Tank Only)
11.1 Samples cut from a tank shall show no signs of cracking when subjected to the ASTM D1693-70(R1980), Standard Test Method for Environmental Stress Cracking of Ethylene Plastics.
11.2 Samples are to be immersed at 50�C (122�F) for 48 hours in IGEPAL CO-630.
12 Qualitative Infrared Analysis (Plastic Only)
12.1 An infrared spectrum is to be obtained by means of an infrared spectrophotometer. The spectrum is to be referred to by means of file number, sample designation, An and spectrum date.
13 Thermal Gravimetric Analysis (Plastic Only)
13.1 A thermogram is to be obtained. The thermogram is to be referred to by means of file number, sample designation, and thermogram date.
14 Differential Scanning Calorimetry (Plastic Only)
14.1 A thermogram is to be obtained. The thermogram is to be referred to by means of file number, sample designation, and thermogram date.
UL testing for PUMP TANK EXTINGUISHERS end
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