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Kemppi A7 TIG Orbital System 300 Manual

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A7 TIG Orbital System 300© Kemppi Oy 2016 1615
OPERATING MANUAL
3.2.3 Other preparations
1. Ensure that the tube ends (or ttings) are machined
square-relative to their axis. The two ends are very
tightly together.
2. Ensure there is no gap between tube ends resulting
from lack of squareness or burrs left from the
machining process.
3. Once the tube end is faced o, check for burrs.
Carefully remove any burrs with a hand de-burring
tool.
4. If the tube wall thickness variation exceeds 10 %,
create a 5° chamfer cut on the inside of the tube
ends.
After the tube has been machined, clean it properly
following this procedure:
1. Wipe the tube end with a lint free towel dipped in a
solvent, such as acetone or denatured alcohol.
2. Immediately dry with a second clean cloth before
the solvent has a chance to dry.
3. Use an abrasive cloth to remove any surface oxides
or contaminants. Clean the tube end back to
approximately 12 mm.
4. Ensure that the tube ID is similarly cleaned
3.2.4 Developing weld procedures/process
parameters
Use the following information to develop process
parameters that meet the most economical weld quality
requirements and procedures/parameters that are
as "forgiving" as possible to real-world tolerances in
variations such as:
• Joint t-up
• Bevel geometry tolerances
• Gravity position
• Torch tracking errors
• Specic problems associated with the workpiece
alloy
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