Brochure

PH: 513-754-2000
THE HARRIS PRODUCTS GROUP
www.harrisproductsgroup.com
8
PH: 513-754-2000
THE HARRIS PRODUCTS GROUP
www.harrisproductsgroup.com
9
Cone: White
No Acetylene Feather
Neutral Flame
Cone: Sharp White
Cone Two-tenths Shorter
Cone
No Acetylene Feather
Acetylene Feather: Intense
Aqua With Feathery Edge
Oxidizing Flame
Carburizing Flame
ADJUST TORCH FLAME
OXYGEN/ACETYLENE
For most brazing jobs using oxy-acetylene gases, a slightly carburizing or
neutral flame should be used. The neutral flame has a well defined inner
cone. Avoid an oxidizing flame.
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PROCEDURES FOR
BRAZING PIPE AND TUBING
PROCEDURES FOR
BRAZING PIPE AND TUBING
AIR/ACETYLENE USING INFERNO
®
SWIRL COMBUSTION TIPS
Brazing with air/acetylene torches is a popular alternative to oxygen mixed
fuel gas. The fuel gas flow aspirates air into a mixer that contains an
internal vane that spins the gas to improve combustion and increase flame
temperature.
If the tank has a delivery pressure gauge, set the delivery pressure to 14-15
PSI. If the tank has only a contents gauge delivery pressure is preset at
the factory. Open the regulator adjusting screw all the way by turning it
clockwise until it bottoms.
OPEN THE TORCH VALVE
Opening the torch valve about 3/4 of a turn will provide sufficient fuel gas
delivery. Do not try to meter pressure (reducing the flame) by using the torch
handle valve. If a higher or lower flame is required, change to a different
tip size.
OTHER FUEL GASES
Alternate fuel gases such as propane, propylene, and natural gas can be
mixed with oxygen for brazing. Refer to the Harris equipment catalog or
website for equipment and setting information.
HEATING THE JOINT AREA.
Always keep the torch in short motion.
When a flux is used, it will be a good temperature guide. Continue
heating the tube until the flux passes the “bubbling” temperature
range and becomes quiet, completely fluid and transparent. Watch
for this on both sides of the joint to ensure even heating.
Direct the flame from the tube to the fitting. When alloy is applied it
should quickly melt and flow into the joint.
Sweep the flame back and forth along the axis of the assembled joint,
tube, and fitting to reach and then maintain uniform heat in both parts.
Start heating the tube, by first applying the flame to a point just
adjacent to the fitting. Work the flame alternately around the tube
and fitting until both reach brazing temperature, before applying the
brazing filler metal.
Apply Alloy
Heating
1
2
Draw Down
Apply Alloy
Heating
1
2
Draw Down
Apply Alloy
Heating
1
2
Draw Down
1
2
3
4