UL 147-2016 pdf download

UL 147-2016 pdf download.Hand-Held Torches For Fuel Gases.
7.8 Copper or brass tubing and fittings containing more than 67-percent copper shall not be used for parts in contact with MPS-Gas.
7.9 An operating or gas-confining part of a torch unit shall have sufficient strength and durability to provide reliable serince of the part and of the assembly.
7.10 To conform to the requirements of 7.9. a gas-confining material is to have a melting point (solidus temperature) of not less than 950°F (510°C) and a tensile strength of not less than 10.000 psi (68.9 MPa) at 400°F (204°C),
Exception No. 1: A valve disc, soft seat. seal ring, diaphragm, or gasket need not comply with this requirement.
Exception No. 2: A torch unit br butane incorporating an integral container assembly complying with 5.2 and subjected to the Hydrostatic Pressure Strength Test, Section 18, and the Sustained Pressure Test, Section 19 need not comply with this requfrement.
7.10 revised Mach 5, 2015
7.11 Polymeric materials used for gas confining housings and caps for butane torches witti integral container assemblies shall exhit flammability characteristics in accordance with the Standard for Test for Flammability of Plastic Matenals for Parts in Devices and Appliances, UI 94. flammability classification V-O. V-i, or V-2.
PERFORMANCE
8 General
8.1 Representative samples of each size and specific construction of torch are to be subjected to the tests specified Wi Sections 9 — 22. The number of samples required for tests are specified in Table 8.1. Additional samples of parts constructed of nonmetallic materials, such as gaskets and other seal materials, are required for physical and chemical tests.
8.2 If a torch is intended for operation on more than one fuel gas, the various performance tests described herein are to be conducted with all fuels and with any orifice/fuel combination possible, whether or not such combination is recommended by the manufacturer. The efficiency of the torch combinations is not to be considered during the tests. The torch units shall not create a risk of fire or injury to persons when tested in such combinations.
9 Filling Procedure Test
9.1 The risk of fire or injury to persons shall not be created duflng the filling sequence, It is recognized that some fuel will be released during the filling process.
92 Three representative samples of a torch unit incorporating a refillable integral container are to be used. Following the manufacturers 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 wTth integral container assembly fully charged is to be subjected to a water bath maintained at 130F (54.4°C) until maximum pressure is established. No external leakage shall be observed. The test is to be conducted until the 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 •1t2 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. 122 Four samples are to be used, two of which are to be subjected to a circulating air oven for 30 days at 212°F (100°C) and two are to be in the as-recewed condition prior to test. The samples are to be fully charged in accordance with the manutacturer’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.