UL 147:2016 pdf download.Hand-Held Torches For Fuel Gases.
5.4 II specific fittings or parts are required for making the intended assembly, such paris shall be furnished by the manufacturer with cacti torch unit.
5.5 A torch unit shall be provided with means for flow regulation and positive fuel shutoff. If a valve stem Is employed, the stem shall be constructed so that it cannot be completely withdrawn from the body by reverse rotation. Threads of a valve stem shall not enter a stuffing box recess, or otherwise interfere with the stem seal area of the body.
5.6 If an integral container assembly is refillable, in accordance with 5.1, the container assembty shall be provided with a shutoff valve arrangement that closes automatically when the torch unit is separated from the refilling fuel container during the filling process.
5.7 A brazing material used for joining liquid•conlining parts of a torch shall have a melting point (solidus temperature) not less than 1OOOF (538CC).
5.8 A torch unit with integral fuel container shall be equipped with pressure relisf device(s) or system(s), or be constructed so that the torch will not rupture or be violently propelled when exposed to a fire condition. See the Fire Test on Torch Units with Integral Containers, Section 17.
5.9 Torches that incorporate a hose assembly shall have the following components and they shall be evaluated to the appropriate UL standard:
a) LP-gas hose assembly — Standard for LP•Gas Hose. UL 21 or the Standard for Pigtails and Flexible Hose Connectors (or LP-Gas, UL 569;
b) Compressed gas regulator or IP-Gas regulator — Standard for Compressed Gas Regulators, UL 252 or Standard for Pressure Regulating Valves for LP-Gas, UI 144:
c) Regulator accessories (if provided) — Standard for Compressed Gas Regulator Accessories, UL 252A: and
d) Excess Flow Valve — Standard for Valves for Anhydrous Ammonia and LP-Gas (Other Than Safety Relief), UL 125.
5.5 A torch unit shall be provided with means for flow regulation and positive fuel shutoff. If a valve stem Is employed, the stem shall be constructed so that it cannot be completely withdrawn from the body by reverse rotation. Threads of a valve stem shall not enter a stuffing box recess, or otherwise interfere with the stem seal area of the body.
5.6 If an integral container assembly is refillable, in accordance with 5.1, the container assembty shall be provided with a shutoff valve arrangement that closes automatically when the torch unit is separated from the refilling fuel container during the filling process.
5.7 A brazing material used for joining liquid•conlining parts of a torch shall have a melting point (solidus temperature) not less than 1OOOF (538CC).
5.8 A torch unit with integral fuel container shall be equipped with pressure relisf device(s) or system(s), or be constructed so that the torch will not rupture or be violently propelled when exposed to a fire condition. See the Fire Test on Torch Units with Integral Containers, Section 17.
5.9 Torches that incorporate a hose assembly shall have the following components and they shall be evaluated to the appropriate UL standard:
a) LP-gas hose assembly — Standard for LP•Gas Hose. UL 21 or the Standard for Pigtails and Flexible Hose Connectors (or LP-Gas, UL 569;
b) Compressed gas regulator or IP-Gas regulator — Standard for Compressed Gas Regulators, UL 252 or Standard for Pressure Regulating Valves for LP-Gas, UI 144:
c) Regulator accessories (if provided) — Standard for Compressed Gas Regulator Accessories, UL 252A: and
d) Excess Flow Valve — Standard for Valves for Anhydrous Ammonia and LP-Gas (Other Than Safety Relief), UL 125.
