TB 17 Portable cutting torch Flashcards
TB 17 Portable cutting torch
The portable oxy-acetylene cutting torch used by this Department will operate for approximately ___ minutes in normal usage and will cut metal up to __ inches thick.
15
2
TB 17 Portable cutting torch
All oxygen connections have ____-hand threads.
right
TB 17 Portable cutting torch
Acetylene cylinder valves have ____-hand threads
Acetylene hose connections at torch and regulator are ___-hand thread.
right
left
TB 17 Portable cutting torch
Open ACETYLENE cylinder valve ____ turns, no more.
Open OXYGEN cylinder valve ____.
1 1/2
fully
TB 17 Portable cutting torch
DO NOT USE OIL ON THIS APPARATUS. OIL AND GREASE ARE EASILY IGNITED AND BURN VIOLENTLY IN THE PRESENCE OF OXYGEN UNDER PRESSURE.
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TB 17 Portable cutting torch
Normal Operating Pressure.
Metal Oxygen Acetylene Working Time
0 - 1” 35 p.s.i. 7 p.s.i. 15 min.
1”- 2” 60 p.s.i. 7 p.s.i. 9 min.
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TB 17 Portable cutting torch
To avoid excessive discharge of acetone, unless absolutely necessary during emergencies, an acetylene cylinder should not be opened or used with the valve lower than the body of the cylinder.
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TB 17 Portable cutting torch
Open the cylinder valve slowly a fraction of a turn.
Watch the cylinder contents gauge pointer; when it stops moving, open the cylinder valve further:
a) Open ACETYLENE cylinder valve 1 1/2 turns, no more.
b) Open OXYGEN cylinder valve fully.
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TB 17 Portable cutting torch
Lighting
Open torch valve fully
Open torch Acetylene valve 1/8 turn and light
Open pre-heat oxygen valve a fraction of a turn
Adjust preheat valve until a clean burn
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TB 17 Portable cutting torch
Shutting Off
Close cutting oxygen valve
Close torch acetylene valve
Close pre-heat oxygen valve
Close torch oxygen valve
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TB 17 Portable cutting torch
Backfire When flame goes out with a pop
Cause -
Incorrect operating PSI
Touching metal with the nozzle
Loose nozzle
IF it occurs -
Immediately close preheat oxygen valve
close torch acetylene
After a moment relight
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TB 17 Portable cutting torch
Carry cylinders vertically
test for leaks with soapy water
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TB 17 Portable cutting torch
Cutting torch– Keep valve packing nut tight enough to avoid leakage. To clean the cutting tip and prevent clogging, use the tip cleaners provided – #8 preheat hole, #22 cutting holes.
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