chronicle companion images
Methanol Reboiler Failure Investigation
PHOTO #1 View of failure found in tube section
NOTE: Elongated defect comprised of multiple/aligned pit sites. Staining from shell side products.
PHOTO #2 View of failure and adjacent micro pitting
NOTE: Failure site initiation point.
PHOTO #3 View of failure
NOTE: Failure site
with full wall penetration.
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PHOTO #4 View of failure from O.D. of tubing
NOTE: Tearing of tube wall.
PHOTO #5 View of linear defect
Aligned along axis of tubing
PHOTO #6 View of linear defect
PHOTO #7 View of failure (3X)
As found during initial inspection
NOTE: Individual corrosion cell/site.
Wormhole/mid surface progression of defect site.
PHOTO #8 View of failure
As found during initial inspection
PHOTO #9 View of linear/axial defect (15X)
As found during initial inspection
NOTE: Cavernous depth to pitting.
Top surface out of focus to allow for focus of interior of pit structure.
PHOTO #10 Additional view
as found during initial inspection
