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PHOTO #4 Removed tube sample
NOTE: Failure in tube
PHOTO #4
Bottom Half - Note Minimal Corrosion
Liquid
PHOTO #5 Severe groove depth adjacent
to edge of support
PHOTO #6
PHOTO #7
PHOTO #8
PHOTO #5
Top Half - Note Corrosion
PHOTO #6
Bottom Half - Note Minimal Corrosion
PHOTO #7 Cross Section
Tube split to show top & bottom
-
Left & right sides show minimal corrosion. Liquid covered.
-
Inner left & right (top circumference of tube) show heavy corrosion. Liquid/Vapor.
PHOTO #8
Top Half - Note Corrosion
Unexpected Tube Failure in
HDS Stripper OVHD Air Cooler
chronicle companion images
PHOTO #2
NOTE: Close up of Failure
PHOTO #1
Top half of tube looking at failure
PHOTO #3
Top Half of Tubing - Note Corrosion
Liquid/Vapor
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
INSPECTION PHOTOS
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