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
Company Policy Page 3 of 3
Interactive Hover Boxes - Listed Alphabetically
Play button for Slide Show
There Is a System:
​​​​​​​​​​
​
BUNDLE
TAGS
B
Protocol for
hanging tags
MO
​
-
GREEN = Bundle is good to go "Return to Service"
-
HOLD = Hold for repairs and/or other hold point
-
REPAIR = Specific repair is required or recommended
-
SCRAP = Bundle is being scrapped
-
RECLEAN = Bundle needs to be recleaned
MII is generally open year round. Pre-request by Email to EW with permission response, for the following:
-
Late Arrival/Leave Early
-
Personal Day
-
Vacation
-
Medical Upcoming
-
Schedule Change
D
DAYS OFF
Late Arrival/Leave Early
Personal Day
Vacation
NWA
Sec 13-2
Only by permission, or for emergencies, will be allowed.
Gather physical
measurements when able to, i.e.
-
Fin fan tube end corrosion
-
Fin fan tube end erosion
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Tube end thinning
-
Corrosion within the roll
-
Corrosion to the O.D.
-
Necking at the supports / back face of tubesheets
S
PHYSICAL
MEASUREMENTS
We want #s
MO
If you can see it, we want a physical measurement.
Scope USB Connection:
-
Use cord strain relief
-
Form a loose loop in USB cable
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Push a few inches of USB cable into table's case
-
Prevents connectors from becoming loose
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Prevents cable movement resulting in noise, shortened probes, etc...
S
STRain
RELIEF
MO
A USB connector is not meant to handle the wear & tear we put them through
f90:
-
Specific operating range/Optimized phase spread
-
Phase difference from the shallow I.D. to shallow O.D. defects of 90°
Additional frequencies selected:
-
Mixing, Landmarking, Flux density considerations.
(PDF Full details.
Click doc icon above.)
F
f90
frequency prime
P=
Tube material resistivity
T=
Tube/Material thickness
MO
Video probes: To collect
stills & video information for corrosion found in an exchanger.
-
Where laid out?
-
Crushing & pinching hazards
-
Don't crimp, beware of tight bends
-
Replace tips over catch basin
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Don't force tips on
-
Clean cable after use
-
Don't use harsh chemicals
-
Use for MII personnel only
V
VIDEO
PROBES
Part 1 of 2
MO
Follow protocols to take care of & use equipment properly.
Video probes: To collect
stills & video information for corrosion found in an exchanger.
-
Equipment stored dry in case
-
Tubing temperature caution
-
Blow down tubes prior to video
-
Go slow as you video probe
-
Clean hands prior to use
-
Carry equip. in protected case
-
Slowly attach recording device
-
Always check stills or videos on a separate device
V
VIDEO
PROBES
Part 2 of 2
MO
Follow protocols to take care of & use equipment properly.
Expect all bundle inspec-
tions are a visual 60/40 ratio. [60% on ground, knees, on back or laying down. 40% from a standing position]
-
Knee pads: Crawl around, under & over bundle
-
Perform measurements i.e. calipers, feeler gauge, picks
-
If you haven't looked, you can't be assured you did not miss it
-
All tube ends on Fin Fans need to be viewed
V
