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Model 81 - Small-Diameter Pipe Weld Head0 pages
The widest range of orbital welding equipment in the world
The Model 81 is a full function orbital pipe
weld head featuring programmable Arc Voltage
Control, Torch Oscillation, onboard Wire Feeder
and Travel in a very compact package.
The Model 81 in its standard configuration will weld
pipe from 1.9" (48 mm) OD to 5.563" (142 mm) OD
with as little as 1.750" (45 mm) radial clearance and
6.325" (161 mm) axial clearance.
The Model 81 is used in a wide variety of applications that require high quality welding results in applications with limited axial and radial clearances. Common uses for the Model
81 include shipbuilding and high-pressure
steam piping in fossil fuel power plants and
many other applications.
Pipe OD Range
Torch Oscillation Stroke
Wire Feed Speed
Travel Speed
1.9” - 5.567”
(48 mm - 142 mm)
0.31”
(7,87 mm)
1.0 - 100 IPM
(25 - 2540 mm/min.)
0.1 - 10 IPM
(2,5 - 250 mm/min.)
AVC Stroke
Filler Wire Size
Wire Spool
Weight
0.750”
(2,4 or 3,2 mm Ø)
0.030” or 0.035”
(0,8 or 0,9 mm Ø)
0.5 lb. special spool
(0,2 kg ) other sizes available
6 lbs. (2,7 kg)
(less cables)
Tungsten Size
Axial Clearance
Radial Clearance
3/32” or 1/8”
(2,4 mm or 3,2 mm Ø)
6.325” (160 mm) minimum
1.75” (45 mm) minimum
Torch
Torch Cross-Seam
Steering Range
Water-cooled, 200 A DC
0.31” (8 mm) motorized
100% Duty Cycle (standard) 0.25” (6,35 mm) manual
Torch Adjustments
lead / lag +/-15°
tilt in / out +/-15°
