UL 147:2005 pdf download – Hand-Held Torches For Fuel Gases
UL 147:2005 pdf download – Hand-Held Torches For Fuel Gases.
8.4 Water o other liquid of comparable or lighter viscosity may be used for producing the required
pressure in a hydrostatic-pressure strength lest.
9 Filling Procedure Test
9.1 The risk of fire or injury to persons shall not be created during the filling sequence. It is recognized that some fuel will be released during the filling process.
9.2 Three representative samples of a torch unit incorporating a refillable integral container are to be used. Following the manufacturer’s instructions, the units are to be filled using recommended and similar commercially available fuel containers. Following this test, the samples are to be subjected to the Pressure Test, Section 10.
10 Pressure Test
10,1 Representative samples of the torch unit with integral container assembly fully charged is to be subjected to a water bath maintained at 130F (54.4CC) until maximum pressure is established. No external leakage shall be observed. The test is to be conducted until tI’ie pressure has stabilized.
10.2 This test is to be conducted on three samples of a torch unit containing an integral container assembly and on the same samples subjected to the Filling Procedure Test. Section 9. Means shall be provided on the samples for the measurement of pressure.
10.3 During this test the burner shutoff valve is to be In the closed position.
11 Leakage Test
11.1 A torch unit is to be subjected for one minute to an internal aerostatic pressure of not less than 1-112 times the service pressure specified in Service Pressure Ratings. Section 4. There shall be no observable leakage.
11.2 This test is to be conducted on three samples of each torch unit design. For torch units incorporating an integral container assembly, the container portion Is to be provided with a fitting for connection to a source of aerostatic pressure. The samples are to be tested with the shutoff valve in a closed position so that seat leakage, as well as external leakage, can be checked.
12 Drop Test
12.1 Representative samples of the torch unit incorporating a nonmetallic container assembly shall not show evidence of cracking. splitting, or rupture, or leak externally when tested in accordance with 12.2.
12.2 Four samples are to be used, two of which are to be subjected to a circulating air oven for 30 days at 212w (100”C) and two are to be in the as-received condition prior to test. The samples are to be fully charged in accordance with the manufacturer’s recommendations and then dropped from rest through a vertical distance of 4 feet (1.2 m) onto a concrete surface so as to impact the side and edge of the container.
13 Operation Test
13.1 Each torch assembly Is to be tested in accordance with the manufacturer’s Instructions and shall perform its intended function.
132 This test is to be conducted on the same samples subjected to the Leakage Test. Section 11, using:
a) Fuel containers charged as intended and
b) All equipment comprising the assembly. 14 Flame Flare-Up Test
14.1 Each torch assembly shall be tested to determine that the flame does not flare-up to a length exceeding 150 percent of the length and configuration recommended by the manufacturer’s instructions. The tlame is to be observed dunng the first 3 minutes of operation with the burner outlet held in any position level with or above the honzontal plane.
14,2 The test conditions specified in 14,1 are to be repeated with the assembly below the horizontal plane (assembly inverted), and if such excessive flare-up is noted, the manufacturer’s operation manual shall warn against using the torch in the inverted position.
15 Valve-Endurance Test
151 Each burner shutoff valve and container filling valve, if provided, Is to be subjected to repeated cycles of opening and closing as specified in 15,2. Alter the endurance test, the valve shall comply with the leakage test requirements specified in 111,
15,2 Samples of each different style of valve are to be subjected to a 1500cycle test. conducted manually and with a closing force sufficient to stop leakage. The vatve inlet is to be pressurized aerostaticalty during the test at 100 psig (690 kPa) if for use with propane. MPS-Gas or all fuel gases other than butane or butane-propane mixtures and at 50 psig (345 kPa) if for use with butane or butane-propane mixtures.