Full-surface corrosion profiling on pressure vessels, storage tanks, structural steelwork, and complex fabrications — capturing millions of dimensionally referenced data points across the entire accessible surface where conventional UT thickness grids measure at discrete, disconnected points.
3D laser scanning for corrosion assessment uses structured-light or time-of-flight scanning technology to capture the complete surface geometry of a component — producing a dense, spatially referenced point cloud that records every measurable variation in the surface profile, including areas of localised pitting, general wall thinning, and corrosion-induced deformation.
Unlike conventional UT thickness surveys — which measure wall condition at a defined grid of discrete points and interpolate the condition between them — 3D laser scanning captures the full surface topology. Pitting depth, corrosion extent, and area of metal loss are measured and visualised across the entire component profile, not estimated between measurement points.
Scan data is registered against the component's nominal geometry — drawing dimensions, previous scan baselines, or photogrammetric reference — enabling every area of dimensional deviation to be directly quantified in three dimensions and referenced against API 579, ASME FFS-1, and equivalent fitness-for-service assessment criteria. 3D laser scanning is entirely non-contact and can be performed on pressurised, in-service vessels and structures without process interruption.
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Above-ground storage tank
shell and floor assessment
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Pressure vessel external
corrosion mapping — nozzles, shells, heads
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Piping corrosion under
insulation (CUI) assessment following targeted insulation removal
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Structural steelwork
condition survey — bridges, offshore jackets, jetties
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Corrosion growth trending
between formal inspection intervals
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Pre- and post-repair
dimensional verification
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Fitness-for-service input
data generation — API 579 / ASME FFS-1 Level 2 and 3
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Corrosion mapping on
complex fabricated components where UT grid coverage is impractical
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API 579 / ASME FFS-1 —
Fitness-for-service assessment — corrosion assessment methodology and remaining
strength calculations
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API 653 — Tank Inspection,
Repair, Alteration, and Reconstruction — floor and shell condition assessment
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ASME B31.3, B31.4, B31.8 —
Pressure piping and pipeline inspection codes
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ISO 17025 — Measurement
traceability requirements for scanning system calibration
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ASME B89 — Dimensional
metrology standards — applicable where scan data is used for precision
measurement