... 2021 (API 579-1) Fitness-For- Service stress intensity factor solutions for a sphere with a through-wall crack (KSTC) was investigated. Finite element models of through-thickness cracked spheres subjected to uniform crack face loading, linear crack face loading, and internal pressure induced stress...

... Abstract API 579-1/ASME FFS-1 Fitness for Service Part 5 local metal loss Level 2 assessment requires a sufficient distance between local metal loss area and neighboring major structural discontinuity based on S.Timoshenko’s model [1] [2]. The model assumed a concentrated force and moments...

... to incorporate the CT scan porosity data into the finite element model of a hydrogen moderator with a GTAW weld to determine fitness-for-service. The stress analysis was performed to evaluate the weld defects and to qualify the GTAW weld via the ASME BPVC design criteria. hydrogen vessel weld porosity CT...

... method. The analysis shed also light on the notch-effect given by local metal loss and on its impact on the accumulated creep damage evaluated via stress or strain methodologies with and without ongoing corrosion. creep corrosion damage fitness-for-service Proceedings of the ASME 2024...

... Abstract The API 579-1/ASME FFS-1 2021 (API 579-1) Fitness-For-Service stress intensity factor solution for a plate with a through-wall center crack (KPTC) subject to bending stress was investigated. Finite element (FE) models of through-thickness center cracked plates subjected to bending...

... methods or replace it. A case study is presented on a Fitness-for-Service (FFS) assessment of TWs left in-service following a change to operating conditions subjecting the TWs to inline resonance. The outcome of the FFS depends on the assumed damping factor which can be accurately determined...

... Abstract Fracture mechanics has been used in Fitness-for-Service assessments of structures containing cracks. The stress intensity factors (SIFs) at the crack tip are the key information in assessing the remaining service life of a cracked component. Extensive studies have been carried out...

... Abstract The 2021 edition of API 579-1/ASME FFS-1 Fitness-For-Service (API 579) includes a new annex, Annex 9H, which contains a procedure to reduce conservatism in the calculation of the toughness ratio, K r , in a Fitness-For-Service (FFS) Assessment of a crack-like flaw to API 579 Part 9...

..., providing invaluable insights into the RPV’s structural integrity. Moreover, the development methodology can be adapted to other reactor components, as well as components of conventional power stations affected by varying operating conditions. reactor pressure vessel fitness-for-service finite...

... Abstract The article highlights the importance of periodic field evaluations, Fitness-For-Service (FFS) applications, and industry experience by dissecting three real-world scenarios and their complementary nature. It covers two plants’ historical and technical backgrounds, discusses field...

... is illustrated with an example. FFS RSF fitness-for-service remaining strength factor probability of failure Proceedings of the ASME 2023 Pressure Vessels & Piping Conference PVP2023 July 16-21, 2023, Atlanta, Georgia PVP2023-106460 DEVELOPMENT OF CODE-SPECIFIC RSFA FOR USE IN API 579-1/ASME FFS-1...

...-for-service of the duct line and determine the remaining life to prepare the maintenance plan to replace or repair the steel part and refractory lining of the duct line. In this paper, a case study of fitness-for-service assessment is performed for the refractory lined duct with extensive hot spot in FCC...

... and discussed. In this part II, current creep temperature limit shown in API579-1/ASME FFS-1 Part 4 Table 4.1 will be discussed and suggest an upgrade of creep temperature criteria for metal loss FFS based on the multi-axial creep model we learned through studies. fitness-for-service metal loss...

... Abstract Fracture mechanics-based failure theory has been used for analyzing structural integrity in Fitness-for-Service assessments of structures containing cracks. The stress intensity factors (SIFs) along the crack front are the key information in order to assess the remaining service life...

... and the results indicated a damage concentration in the fine-grained intercritical HAZ, which is consistent with the Type-IV cracking of welds in the creep regime. creep damage fitness-for-service Proceedings of the ASME 2023 Pressure Vessels & Piping Conference PVP2023 July 16-21, 2023, Atlanta...

..., throughout the long term effort of cross industry task team led by authors supported by API579-1/ASME Joint Committee on Fitness-For-Service members, the conflict has been solved in the local committee. Effective from April 1 st , 2022, Oil and Chemical industry in Japan got a formal approval from...

... mechanics approach, C*. The results of the test program and modeling efforts are described in detail. fitness-for-service mechanical properties low alloy carbon steel hydrogen high temperature hydrogen attack creep C* Proceedings of the ASME 2022 Pressure Vessels & Piping Conference PVP2022...

... in more aggressive environments, such as NACE A or NACE B solutions. Additionally, most of the work was conducted on more modern steels rather than service aged of vintage steel. The lack of available data inhibits the ability to perform fitness for service (FFS) assessments without using overly...

... overly conservative and may lead to unrealistic integrity assessments of refinery vessels by applying API 579 Fitness for Service (FFS) assessments. Following the 1984 incident, most of the research carried out into sour water environments was targeted to material susceptibility and effects of sour...

... Programs will be summarized with typical management oversight actions described for effective implementation. covered piping systems CPS condition assessment operation & maintenance creep fatigue corrosion-fatigue Gr. 91 thermal quench corrosion FAC E/C fitness-for-service remaining...