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Blog

24 May 2025

What to include in an API 510 Report

General InfoVessel ID, location, service, inspector name, dates
Inspection SummaryScope, type (internal, external, etc.), methods used
Visual FindingsCracks, corrosion, weld condition, support condition
Thickness ReadingsKey areas, comparison with prior readings
NDE ResultsUT, RT, MT, PT findings if applicable
Corrosion Rates & MAWPCalculated remaining life, minimum thickness
RecommendationsRepairs, re-inspection, continued service, etc.
PhotographsVisual documentation of findings
Drawings & SchematicsAnnotated drawings showing areas of concern
Inspector’s CertificationSignature, API 510 certification number
Owner/User ReviewSigned acknowledgment and action plan (if needed)
4 April 2025

How is remaining life calculated

It is calculated based on minimum t actual and not averaged thickness. That way the weakest area gets addressed rather than averaging out the thickness for that area.

  • Determine the Actual Thickness (t)
    • Measured using Ultrasonic Testing (UT) or other NDE methods
    • Done at established Thickness Monitoring Locations (TMLs).
  • Determine Minimum Required Thickness (tₘᵢₙ)
    • Calculated using
      • ASME Section VIII Div 1 formula for pressure vessels.
      • Factors include design pressure, temperature, material, and corrosion allowance.
      • Example for cylindrical shell:
19 March 2025

How to calculate next inspection date

  • To calculate the next inspection date for pressure vessels under API 510, you typically use the remaining life, the corrosion rate, and API 510 code-defined intervals or Risk-Based Inspection (RBI) methodology.
  • General Formula (for Time-Based Inspection)
  • Next Inspection Due=Last Inspection Date+min(Remaining Life/2,Maximum Interval)
  • Calculate Remaining Life
    Remaining Life=(t−tmin)/CR
17 Feb 2025

Important Considerations

  • Corrosion may not be uniform — always evaluate worst-case areas.
  • RBI (Risk-Based Inspection) methods may modify life predictions.
  • Localized damage (pitting, stress cracking) requires FFS analysis (API 579).
  • Other failure modes (e.g., fatigue, creep) need different assessments.
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FAQs

FAQs

Frequently Asked Questions

The report would include equipment details, nominal thickness, actual thickness, minimum required thickness, Remaining Life and next inspection dates. It will also include the findings and recommendations, drawings, photographs of equipment, certificates of inspector and any additional information that you would like to submit to your clients.

Report will be provided in PDF format, that will include everything related to the inspection, that you can submit to your clients.

Yes, it will include the calculations. You will need to specify which calculations are needed for the inspection.
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