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Equipment ST-101
FM MECH-MECH-FATIGUE
ISO 14224 mode
Source synthetic + standards-based engineering estimate derived from MCS mechanism substrate (API/ISO/GB/TSG framework); mechanism-derived, non-measured, transparently labeled seed
机械疲劳
ST-101 · 球罐/液化气球罐/丙烷球罐 (Spherical Tank)
Related equipment → ST-101
0.80Source conf.
—Evidence conf.
ISO 14224 mode
1Failure Mechanism
Function:None
Failure cause:机械疲劳 驱动材料退化/功能失效
Damage mechanism：机械疲劳 (MCS MECH-MECH-FATIGUE)
2Source Basis (where this FM comes from)
synthetic + standards-based engineering estimate derived from MCS mechanism substrate (API/ISO/GB/TSG framework); mechanism-derived, non-measured, transparently labeled seed
Source confidence 0.80: this FM is derived from the ontology KB and cross-validated by synthetic + standards-based engineering estimate derived from MCS mechanism substrate (API/ISO/GB/TSG framework); mechanism-derived, non-measured, transparently labeled seed.
3Evidence Chain (supporting basis)
This FM has no offline curated evidence text; it is derived from the ontology KB and cross-validated by the listed standard clauses and related accident investigations.
Governing standards (evidence)：mcs:API RP 571 (2020) — Mechanical Fatigue — API RP 571 (2020) — Mechanical Fatigue · 机理级工程估计, 非实测; 来源 MCS 机理矩阵 MECH-MECH-FATIGUE
4Related Real Accidents (traceable to accident cards)
This FM is recorded in 3 real accident investigation(s); tap the report no. to open the corresponding accident lesson card.
5Applicable Standards & Clauses
API 510API 579-1/ASME FFFSAPI 653API 570ISO 14224:2016API 580GB/T 12337GB/T 150API RP 571
No separate clause reference.
6Derived Analysis (seeded from this FM)
8/3/3FMEA Sev/Occ/Det
0.24RBI λ
0.7Monitor pdet
12 月Insp. int.
Current tasks:磁粉/超声波检测 | 应力分析复核 | 定期无损检测
RCFA incident:机械疲劳导致设备功能退化/失效, 后果类型 Operational, 严重度 8
7RCM Maintenance Decision (strategy landing)
CBMOn-Condition Maintenance
Recommended task无损检测(UT/MT/PT) 监测裂纹萌生, 关键转动件定时拆检
Suggested intervalHigh risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Decision basis机理类别=fatigue
Governing standardsAPI 579API 612ASME VIII
⚠ This decision is engineering-inferred by RCM logic from the damage mechanism / root cause / failure cause — it is not derived from measured site history. Confirm with the equipment owner and process before execution.
⚠ 本卡技术正文（功能 / 致因 / 损伤机理 / RCFA 叙事）保留中文原文——依可信 AI 红线，自由技术文本不自动机翻、不编造英文译文。UI、设备类型、FM 名、ISO 码、标准号均为英文。