ATS logo ATS Fitness-for-ServiceIndustrial Inspection & Radiological Services

From site findings to a signed fitness-for-service report

ATS uses this system to turn site inspection findings into a factual inspection report, then into fitness-for-service assessments of pressure vessels, columns, heat exchangers, storage tanks, piping and structural steel. Each step is reviewed and signed off by qualified engineers.

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Equipment assessed A horizontal pressure vessel with a corroded area mapped by an ultrasonic thickness grid, and below it a storage tank, a shell-and-tube heat exchanger and a steel beam section with a gouge. s c UT grid, tmm pressure vessels, columns, piping remaining strength RSF compared with RSFa Storage tanks Heat exchangers Structural steel
Damage is measured on site, and each item is assessed on its remaining, measured condition.

What it covers

Each calculation records the standard, clause and equation it uses, together with the inputs as entered, so every result in a report can be traced and checked.

Pressure equipment and storage tanks

API 579-1 / ASME FFS-1 — pressure vessels, columns, heat exchangers, storage tanks and piping

  • General metal loss (Part 4), Level 1 and Level 2
  • Local thin areas (Part 5), Level 1
  • Pitting corrosion (Part 6), Level 1
  • Hydrogen-induced cracking and blisters (Part 7), Level 1

Structural steel

AISC 360-22 — beams, columns, braces and connections

  • Tension (Chapter D) and compression (Chapter E)
  • Flexure about the major and minor axes (Chapter F)
  • Combined forces (Chapter H) and block shear (Chapter J)
  • Retained capacity of damaged members compared with the intact section

Crack-like flaws (API 579 Part 9) and dents (Part 12) are assessed by our engineers outside this system.

How a job runs

The client approves the factual record before any assessment starts, and the approved record carries through to the final report without being retyped.

  1. 1

    Site inspection

    Findings, measurements, test results and photo numbers recorded on standard site forms.

  2. 2

    Site Inspection Report

    A factual report with photographs and engineers' interpretation. No fitness-for-service verdicts at this stage.

  3. 3

    Client approval

    The client approves the report. The approval is recorded against it.

  4. 4

    FFS assessment

    Each component is assessed at Level 1, and at Level 2 where Level 1 is not satisfied.

  5. 5

    Review and issue

    Reports are reviewed, signed by the responsible engineers and issued to the client.

Built for accountable engineering

Engineers make the decisions

The software calculates and assembles. Dispositions, conclusions and sign-off are made by named engineers, and nothing is marked approved automatically.

Traceable from site to report

Every component in an assessment report cites the inspection item it came from, with the photographs and measurements recorded on site.

Client data stays controlled

Access is by individual account only. AI assistance is off by default and is used only where the client has given written consent, which is recorded.

Missing data is shown, not filled in

Where a measurement was not recorded, the report says so and states the assumption made, instead of inventing a value.

Access is by invitation

If you would like to discuss an assessment or use the system for your facility, send us a short message and we will reply by e-mail.

Request access