Hot Welds
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Cold Welds 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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Cold Welds

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Examples of failing welds sample 1 destructive testing 1317357

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 1 destructive testing 1317357

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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Examples of failing welds sample 1 destructive testing 1317357

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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