Quick answer
In short, fitness-for-service assessment means assessing damaged or corroded equipment per API 579 to extend safe operating life. The work is governed by ASME Sec VIII Div 2 and API 579, executed on licensed ANSYS Mechanical Enterprise and checked against a documented QA checklist before issue.
What fitness-for-service assessment actually includes
Fitness-for-Service Assessment is the discipline of assessing damaged or corroded equipment per API 579 to extend safe operating life. In practice a complete scope covers the full chain from design inputs to construction-ready output, not just a single drawing or calculation.
A typical fitness-for-service assessment package from our team includes: fea model & mesh study, linear / non-linear results, stress categorisation & linearisation, buckling & modal results. Each deliverable is produced on licensed ANSYS Mechanical Enterprise and passes an internal checker review before it reaches you.
How the work is delivered, step by step
Most engagements follow the same five-stage flow, whether the package is a single drawing or a multi-month frame agreement.
- Share inputs — design drawings, specifications and the project schedule.
- Free quote in 24 hours — fixed lump-sum, per-tonne, per-drawing or hourly.
- Model & engineer — built on ANSYS Mechanical Enterprise to ASME Sec VIII Div 2.
- Review & approve — internal check, then your comments closed fast.
- Issue for construction — fea model & mesh study and linear / non-linear results issued with revision control.
Which codes and standards govern fitness-for-service assessment
The governing standard depends on where your project is built. Our teams work daily to ASME Sec VIII Div 2, API 579, EN 13445 Annex B and to client specifications such as Shell DEPs and major operator standards.
Getting the code basis agreed at kick-off is the single most effective way to avoid late-stage rework — it fixes load combinations, material grades, tolerances and documentation format before modeling starts.
When you need it — and when you don't
You need professional fitness-for-service assessment whenever the output feeds fabrication, regulatory review or a design-responsibility handover. Early concept sketches and feasibility studies can be lighter, but anything issued for construction should carry a checked, code-referenced package.
If you are unsure which level of detail your project needs, send us your inputs — a senior engineer will scope it honestly, even if that means telling you a smaller package will do.
What Is Fitness-for-Service Assessment? A Complete Guide: FAQ
What is fitness-for-service assessment?
In short, fitness-for-service assessment means assessing damaged or corroded equipment per API 579 to extend safe operating life. The work is governed by ASME Sec VIII Div 2 and API 579, executed on licensed ANSYS Mechanical Enterprise and checked against a documented QA checklist before issue.
Which software is used for fitness-for-service assessment?
We deliver on licensed ANSYS Mechanical Enterprise and issue native files plus PDF, DWG and IFC on request.
Which standards do you follow for fitness-for-service assessment?
We work to ASME Sec VIII Div 2, API 579, EN 13445 Annex B, plus client specifications such as Shell DEPs and major operator standards.
How long does a fitness-for-service assessment package take?
Small packages are typically delivered in 3–7 working days; larger scopes are split into phased submissions agreed at kick-off.
How do I get a quote for fitness-for-service assessment?
Send your drawings or scope through our quote form — a senior engineer reviews them and returns a fixed-price proposal within 24 hours, free and without obligation.