Historical Background of API 579/ASME FFS-1  
1990: Joint industry project was organized by the Materials Properties Council (MPC) to develop FFS guidelines for the refining industry
2000: Based on the MPC final report, API issued API-579 recommended practice for FFS Assessment, which was welcomed by both refinery and non-refinery industries
2007: ASME joined forces with API and issued API 579-1/ASME FFS-1 Standard Contents of API 579-Code Parts

Parts of the (2000) API 579
Part 1 – Introduction
Part 2 – FFS Engineering Evaluation Procedure
Part 3 – Brittle Fracture
Part 4 – General Metal Loss
Part 5 – Localized Metal Loss
Part 6 – Pitting Corrosion
Part 7 – Blisters, HIC, and SOHIC Damage
Part 8 – Weld Misalignment and Shell Distortions
Part 9 – Crack-Like Flaws
Part 10 – Equipment Operating in the Creep Range
Part 11 – Fire Damage

Summary
Inspections of a pressure vessel, tank, or related equipment should be performed on a regular basis to ensure their continued operation is safe. When equipment is found to contain a flaw, or damage, Fitness-For-Service (FFS) assessments are performed to demonstrate structural integrity. API 579-1/ASME FFS-1 provides guidance for conducting FFS assessments, specifically prepared for pressurized equipment.

Fitness-for-service evaluations performed in accordance with this Standard are recognized and referenced by API 510 (“Pressure Vessel Inspection Code”), API 570 (“Piping Inspection Code”), API 653 (“Tank Inspection, Repair, Alteration, and Reconstruction”), and by NB-23 (“National Board Inspection Code”) as suitable for evaluating the structural integrity of pressure vessels and related equipment.

References
(1) “An Overview of API 579-1/ASME FFS-1 Fitness-For-Service Assessment Standard with Applications to Case Studies” Mohammad M. Megahed & Mohammad S. Attia, Faculty of Engineering – Cairo University – Egypt, 3rd International Conference in Africa and Asia, Welding and Failure Analysis of Engineering Materials, 2-5 November 2015, Luxor, Egypt
(2) Fitness-For-Service Assessment Procedures API 579/BS 7910 (https://www.twi-global.com/technical-knowledge/published-papers/which-procedures-for-fitness-for-service-assessment-api-579-or-bs-7910-july-2003)

 

Resources on Fitness for Service

API 579: A Comprehensive Fitness-For-Service Guide (International Journal of Pressure Vessels and Piping)


API 579-1/ASME FFS-1 Fitness for Service on Ash Silo

We performed an API 579-1/ASME FFS-1 Fitness For Service Evaluation of a 40 year old ash silo (approximately 38-foot diameter x 64-foot tall).

In addition to performing Fitness for Service Evaluations – we also provide Engineering to API Codes including 510, 570, 653.

(412) 835-5007

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