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API 579-1 / ASME FFS-1

Fitness-for-service assessment of in-service equipment

API 579 / ASME FFS-1 is the fitness-for-service standard for in-service damage. Ask Deckhand to assess a corroded line or vessel from inspection readings and get a remaining-strength verdict.

Run it on Open Deck

What you can ask it to do

  • Run a Level 1 / Level 2 general and local metal-loss assessment from wall-thickness readings against the design pressure.
  • Estimate remaining strength and the maximum allowable working pressure.
  • State the assumptions and where a Level 3 (detailed) assessment would be needed.

Related standards

API 579-1 ASME FFS-1 Fitness-for-service Metal loss Remaining strength

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Questions

What is fitness-for-service?

A quantitative check of whether equipment with damage — corrosion, cracks, dents — is still fit to operate. API 579-1/ASME FFS-1 gives the assessment levels and acceptance criteria.

What can Deckhand assess?

General and local metal loss at Levels 1 and 2 from wall-thickness readings against the design pressure, returning the remaining strength and the allowable pressure, with the assumptions traced.

Run API 579-1 / ASME FFS-1 on your own inputs

Open Deck is free — bring your numbers and check the result against your own methods.

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