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Examples of Failing Welds: Sample 1 Destructive Testing - PowerPoint PPT Presentation


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Hot Welds. Cold Welds. Failure was as the weld Poor fusion of the filler rod / wire to the tubes Weld bead radius is smaller than tube wall thickness Little to no heat discoloration The fitted / coped edges of the tube are visible after separation. Failure was at the weld

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Presentation Transcript
slide1

Hot Welds

Cold Welds

  • Failure was as the weld
  • Poor fusion of the filler rod / wire to the tubes
  • Weld bead radius is smaller than tube wall thickness
  • Little to no heat discoloration
  • The fitted / coped edges of the tube are visible after separation
  • Failure was at the weld
  • Weld / tube thickness was very small at point of failure
  • Weld bead radius is distinctly larger than tube wall thickness
  • Extreme heat discoloration

Examples of Failing Welds: Sample #1 (Destructive Testing)

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Examples of Failing Welds: Sample #2 (Destructive Inspection)

  • Inconsistent and unclearly defined fusion line
  • Weld bead radius is smaller than tube wall thickness
  • Weld bead does not adequately contact and fuse the both tubes

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Sample #2 – Destructive Inspections

Sample #1 – Destructive Testing

Examples of Passing Welds

  • Moderate Heat Discoloration
  • Weld bead radius is approximately the same as tube wall thickness
  • Clearly defined and substantially uniform width fusion line, no burn - through
  • Failure was not at the weld
  • Weld bead radius is approximately the same as tube wall thickness
  • Moderate Heat Discoloration

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