Brochure

Corrosion & Erosion
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20
Corrosion & Erosion
• Turbine blade erosion can lead to decreased per-
formance and blade failure
• Pitting may occur before vibration analysis can
detect a problem
• RVI can rapidly assess blade condition and equip-
ment can be scheduled for more detailed preven-
tative maintenance
• See page 7 - 8 for general description
• Sand erosion can occur at change in direction/
diameter in oshore production risers due to solids
ingestion, typied by a smooth surface with a sand
dune pattern
• Riser locations where sand erosion may occur are
dicult to access and inspect with conventional
ultrasonic and X-ray testing
• Permanently-installed sensors can be applied to
suspect areas for accurate monitoring without the
need for repeated mobilization of inspection per-
sonnel
• See pages 15 - 18 for general description
• HF unit ange integrity must be assessed per API 751
• Manual ange opening and inspection nearly as
costly as outright replacement
• UT-PA imaging can signicantly enhance detection
and sizing of ange face corrosion damage for
replacement prioritization for turnaround
• Proven to be accurate and cost eective over
conventional inspection methodologies
• See pages 9 - 10 for general description
• Insulation and reproong can accumulate
moisture and cause accelerated corrosion
• Breaches of weather jacketing increases with age
and mechanical damage
• Extensive stripping and abatement needed for
visual testing and ultrasonic testing
• Digital X-ray can give general condition a specic
thickness in recordable format for prioritization of
additional inspection/remediation can be scheduled.
• See pages 11 - 12 for general description
• Heat exchanger tube problems can cause unit
outages and environmental impact
• Damage can occur suddenly (titanium tube
support plate wear after 2 weeks of above design
ow conditions) or longer term
• RVI can provide internal condition. Leak testing
does not provide volumetric assessement
• ET is preferred method of tube inspection for non-
ferrous alloys
• See page 13 for general description
• Hydrogen damage can be caused by condenser in
leakage and failures can lead to unit outages
• External UT/EMAT scanning can be used to identify
suspected areas of wall loss
• RVI can rapidly conrm external inspections for
exact location and severity of boiler tubes for ID
damage
• See pages 7 - 8 for general description
Corrosion Under Insulation/Fireproofing
Radiographic Testing (RT)
Heat Exchanger Damage
Eddy Current Testing (ET)
Boiler Tube Hydrogen Damage
Remote Visual Inspection (RVI)
Turbine Blade Erosion
Remote Visual Inspection (RVI)
Offshore Riser Sand Erosion via Installed
Sensors
Ultrasonic Testing (UT)
HF Unit Flange Face Corrosion
Ultrasonic Phased Array (UT-PA)
Industrial environments will promote signicant corrosion
of carbon steel piping components
Heat exchanger tubing can suer specic damage that
can be precisely qualied by ET
Localized corrosion damage in carbon steel can be con-
rmed using visual methods
Catalyst and solid can cause severe damage to rotating
and stationary blades
Solid particles can generate rapid wall loss under proper
conditions in oshore risers
HF scale and corrosion can signicantly compromise
ange integrity