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Boiler Tube Failure Handbook

Home » Boiler Tube Failure Handbook » Cracking » Not in or near a weld » Fish-mouth rupture

Fish-mouth rupture

ST Overheat CNL10a

ST Overheat CNL10a1

Click on images to enlarge.


Comments

Caused when steam flow is blocked or severely restricted. Lack of cooling leads to tensile rupture of tube.

Issue Type:
Cracking » Not in or near a weld
Locations:
Reheater, Superheater
Boiler Type:
Power
Industry:
Electric Utility
Mechanism:
Short-Term Overheat

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Fish-mouth rupture

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