MetFab - Air Products Welder's Handbook - Flipbook - Page 31
Welding pipes and tubes
There are three main types of
welded joint used:
Pipe rotators
• butt
• branch
• flange
The pipe or tube should, if possible,
be positioned in a manipulator and
rotated so that the weld is made in the
horizontal position (PA position, see
page 8) enabling the most productive
welding process to be used.
One driven unit
and one idler
Before welding, the pipes can be clamped
or tack welded to maintain alignment.
Leading and trailing edges,
tack welded and ground
Uniform
penetration inside
Butt
Branch
Flange
Tack weld
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