User guide

TRANSTIG 170Pi
Manual 0-5241 4-3 BASIC WELDING GUIDE
Art# A-07693
Figure 4-7: Overhead Position, Butt Weld
Art # A-07694
Figure 4-8: Overhead Position, Fillet Weld
Joint Preparations
In many cases, it will be possible to weld steel sections without any special preparation. For heavier sections
and for repair work on castings, etc., it will be necessary to cut or grind an angle between the pieces being
joined to ensure proper penetration of the weld metal and to produce sound joints.
In general, surfaces being welded should be clean and free of rust, scale, dirt, grease, etc. Slag should be
removed from oxy-cut surfaces. Typical joint designs are shown in Figure 4-9.
Gap varies from
1.6mm (1/16”) to 4.8mm (3/16”)
depending on plate thickness
Joint
Open Square Butt
1.6mm (1/16” ) max
1.6mm (1/16”)
Single Vee Butt Joint
Not less than
70°
Double Vee Butt Joint
1.6mm (1/16”)
Lap Joint
Tee Joints
(Fillet both sides of the
joint)
Edge Joint
Fillet Joint
Corner Weld
Plug Weld Plug Weld
Not less than
70°
Single Vee Butt Joint
Not less than
45°
1.6mm (1/16”) max
Art # A-07695_AE
Figure 4-9: Typical Joint Designs for Arc Welding