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WELD SEAM
Welding away from the body
The torch is pushed away from the user.
Result: The weld penetration is small, weld seam wide and flat and the possibility of a poor
joint higher.
Welding towards the body
The torch is pulled away from the weld seam.
Result: The weld penetration is better, weld cord smaller and the possibility of a poor joint
lower.
JOINTS
There are two essential types of welding joints: Butt joints and angle joints (outer corner, inner
corner and superimposition)
Butt joints
When welding a butt joint with material up to 2 mm thick, the entire faces of the material must
be in contact with each other. For thicker materials, use Table A as a guide.
Table A
S=
Horizontal
d=
0.5 - 1.5 mm
workpiece
Face
d=
Vertical
d=
1 - 1.5 mm
workpiece
External corner joints
This joint is very simple to achieve, but is not practical
for materials thicker than 10 mm. For materials thicker
than 10 mm, we recommend preparing a joint as
illustrated in figure 7.
Internal corner joints
This joint is very simple to achieve, and is used for materials up to 5mm
thickness. The value of 'd' should be kept to a minimum and should in
no circumstances be less than 2 mm.
2 - 3 mm
3 - 4 mm
1.5 - 2.5 mm
1 - 2 mm
2 - 3 mm
1.5 - 2.5 mm
98
4 - 5 mm
2 - 3 mm
3 - 4 mm
2 - 3 mm
Fig. 7
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