Hard- Surfacing, Building Fusion Welding Carbon Welding Non-Ferrous Metals Heating & Heat Treating Braze Welding Welding Cast Iron Welding Ferrous Metals Brazing & Soldering Equipment Set-Up Operation Equipment For OXY-Acet Structure of Steel Mechanical Properties of Metals Oxygen & Acetylene OXY-Acet Flame Physical Properties of Metals How Steels Are Classified Expansion & Contraction Prep For Welding OXY-Acet Welding & Cutting Safety Practices Manual Cutting Oxygen Cutting By Machine Appendices Testing & Inspecting
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Fig. 12-3. The single lap weld (left) and double lap weld (right). For oxy-
acetylene welding, the square butt weld or single-V is almost always preferred
to the lap weld.
Fig. 12-4. The single-V butt weld is used almost
exclusively for all oxy- acetylene welds in metals
thicker than 1/8-3/16 in. (3-5 mm). The square
nose at the base of the V is not always required.
The double-V and U- groove joint designs are
frequently used for electric welding of material
thicker than 1/2 in. (12 mm).