Fatigue Assessment for In-Service Components – A New Part for API 579-1/ASME FFS-1 Fitness-For-Service
Fatigue Assessment for In-Service Components – A New Part for API 579-1/ASME FFS-1 Fitness-For-Service
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在用部件的疲劳评估 – API 579-1/ASME FFS-1 适用性的新部分
DOI：
10.1016/j.proeng.2015.12.673
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
D. Osage
中科院分区：
文献类型：
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作者：
D. Osage
第三版API 579-1/ASME FFS-1适用性将包括一个新的部分，涵盖在用部件的疲劳评估程序。适用性（FFS）评估是定量工程评估，用于证明可能包含缺陷或损坏或可能在可能导致故障的特定条件下运行的在用组件的结构完整性。API 579-1/ASME FFS-1标准是专门编写的，以涵盖炼油和石化行业以及化石公用事业行业中常见的在役加压设备。新的部分将涵盖用于使用应变寿命方法估计裂纹萌生时间的方法，并将作为一种多层方法编写，包括筛选、当前设计规范方法和考虑到最新技术的先进方法。新部分中的筛选和设计规范评估方法将基于ASME B&PV规范第八节第2部分中程序的更新版本。先进的方法将包括焊接接头疲劳评估的下一代版本，WRC 523中描述的主S-N曲线方法，以及Battelle开发的Verity疲劳评估方法。先进的方法还将包括一种新的光滑杆疲劳评估方法，该方法将多轴疲劳标准与临界平面方法相结合。将提供焊接接头和光滑杆疲劳方法的循环计数方法。还介绍了使用断裂力学方法评估API 579-1/ASME FFS-1中亚临界裂纹扩展区疲劳的方法。
The third edition of API 579-1/ASME FFS-1 Fitness-For-Service will include a new Part covering fatigue assessment procedures for in-service components. Fitness-For-Service (FFS) assessments are quantitative engineering evaluations that are performed to demonstrate the structural integrity of an in-service component that may contain a flaw or damage, or that may be operating under a specific condition that might cause a failure. The API 579-1/ASME FFS-1 Standard was specifically written to cover in-service pressurized equipment typically found in the refining and petrochemical industries as well as the fossil utility industry. The new Part will cover methods used to estimate the time to crack initiation using a strain-life approach and will be written as a multi-tiered approach covering screening, current design code methods, and advanced methods that take into account the latest in technology. The screening and design code assessment methods in the new Part will be based on an updated version of the procedures in the ASME B&PV Code, Section VIII, Division 2. The advanced methods will include next generation versions for the fatigue assessment of welded joints, the Master S-N Curve Method as described in WRC 523, and the Verity Fatigue Assessment Method developed by Battelle. The advanced methods will also include a new smooth-bar fatigue assessment method that incorporates a multi-axial fatigue criterion with a critical plane approach. Cycle counting methods for both welded joint and smooth-bar fatigue methods will be provided. Methods to evaluate fatigue in the subcritical crack-growth regime in API 579-1/ASME FFS-1 using a fracture mechanics approach are also covered.