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Transverse cracking in the rolled portion of tube where it is inserted into the drum
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Comments
Stresses are introduced into the tube by the rolling operation. If these rolled connections leak-by, caustic from the boiler treatment concentrates in the crevice and leads to failure. Similar failures can occur on any tube with a leaking rolled connection.
Issue Type:
Near or in weld or attachmentLocations:
Riser tube at rolled connection in drumBoiler Type:
Industrial/PowerIndustry:
Common, VariousMechanism:
Caustic Induced Stress Corrosion Cracking
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Transverse cracking in the rolled portion of tube where it is inserted into the drum
