Inspection
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Thickness Monitoring

The systematic measurement, analysis and trending of wall thickness to assess asset degradation and remaining life.

Definition

Thickness Monitoring is the systematic process of collecting, analysing and trending wall thickness measurements to evaluate corrosion, erosion and other degradation mechanisms affecting the integrity of equipment and piping. Thickness Monitoring supports inspection planning, Remaining Life assessments, Fitness-for-Service evaluations and Risk-Based Inspection programs by providing objective evidence of material loss over time.

Why It Matters

Thickness Monitoring evaluates wall loss trends to support asset integrity management and inspection planning.

In Practice

Thickness Monitoring programs use measurements obtained at designated Thickness Measurement Locations to identify degradation trends, calculate corrosion rates and support engineering decisions relating to continued service, repair or replacement.

Common Misuse

Thickness Monitoring is the ongoing integrity management process, whereas a Thickness Measurement Location is the individual location where thickness measurements are obtained.

Term Details
Synonyms:
Thickness Monitoring; Wall Thickness Monitoring; Corrosion Monitoring; Thickness Trending
Classification:
Inspection & NDT
Methodology
Advanced
Applications

Asset Integrity; Inspection; Corrosion Management.

Where It's Used

Oil and gas.; Petrochemical.; Pipelines.; Power generation.; Manufacturing.

References

API 570; API RP 574; API RP 581

See It In VisualAIM

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