WSWeldScopeInteractive welding engineering training
Welding processes and equipment

Gas welding

The flame melts the component edges and filler rod. The heat source is less concentrated than an electric arc, producing a wider HAZ and greater distortion risk.

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Topic overview

The flame melts the component edges and filler rod. The heat source is less concentrated than an electric arc, producing a wider HAZ and greater distortion risk.

Variable oxygen/fuel-gas ratio. The diagram shows the inner cone, reducing zone, oxidising outer envelope, approximate maximum temperature and risks to the weld.

For repairs, erection, smaller thicknesses, local heating, simple piping and where equipment mobility matters.

A flame has a lower energy concentration than an arc. Incorrect manipulation readily increases HAZ width, distortion and surface oxidation.

What the module covers

  • Oxy-fuel gas welding
  • Key parameters
  • Typical imperfections
  • Quality control
  • Interactive flame trainer
  • When it is suitable
  • What to watch
  • Safety
Educational content does not replace current standards, approved WPS/WPQR documentation or decisions by competent welding coordination personnel.

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