When to Use - Level 1 screening (conservative equations, minimal inspection data) - Level 2 detailed assessment (refined analysis using thickness profiles) - RSF and MAWP calculation from UT thickness data - Remaining life projection with linear and power-law corrosion models - Processing UT grid CSV data to CTP (Critical Thickness Profile) maps - Run-repair-replace decision framework Assessment Levels (API 579-1/ASME FFS-1) | Level | Approach | Input Required | |-------|----------|----------------| | Level 1 | Screening — conservative, tabulated equations | Nominal thickness, design pressure…