Conduct study and identify systems within various units
operating below350°F Review P&IDs and consult Process
Engineering for operating temperatures Consult Operations to
identify systems in intermittent service
Conduct Field Surveys and Pre-screening to Identify
Affected Systems Identify insulated dead legs and stagnant
zones for inspection
Identify following ig ris! areas for inspection of
insulated systems operating "#$%°F 't (rea!s or gaps 't
areas su()ect to process spills 't areas e*posed to
vapors 't areas e*posed to wetting (y steam vents 't
protruding vents+ drains+ supports or pipe angers On steam
traced systems wit tracing lea!s 't locations wit missing
insulation caul!ing
Inspection of High Ris Systems Once a ig degree of
rusting is confirmed after pre,screening+ utilize following
inspection tecni-ues to assess condition of entire
systems Randomly remove insulation for visual inspection and
./ gauging+ specifically on lines 01%2 Conventional or
state,of,te art digital radiograpy on lines 31%2 Depending on
system configuration+ 4ong,rang 5uided 6ave .ltrasonic
75.48 Conduct spot P/ of stainless steel pipe welds for
C9CC
8/16/2019 CUI.ppt
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Corrosion Under Insulation !CUI" Program
Submit Recommendations for Piping Repairs as
Re#uired /iming for repairs to (e (ased on actual condition
and pipe retiring limits :rea!s;openings in insulation tat
represent ig ris! areas are to (e immediately
repaired to mitigate C.I Consider te use of insulating
material tat does not a(sor( moisture+ eg
calcium silicate 'll new and e*isting piping to (e coated
prior to insulating
$ocument Inspection Findings on a $ata %ase for Periodic
Inspectionand follo&-up
Periodic Inspection of High Ris Systems Implement
periodic inspection program utilizing trac!ing data
(ase Follow,up wit inspection on systems ran!ed as aving a
medium rust grade percentage Conduct 'PI $
