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Equipment FWP-101
FM fwp_check_valve_fail
ISO 14224 mode M M
Source engineering_estimate
止回阀失效/回流
FWP-101 · Fire Water Pump
Related equipment → FWP-101
0.82Source conf.
—Evidence conf.
MISO 14224 mode
1Failure Mechanism
Function:防止倒流
Failure cause:止回阀卡涩/泄漏致停泵时水倒流
Damage mechanism：止回阀失效致回流
2Source Basis (where this FM comes from)
engineering_estimate
Source confidence 0.82: this FM is derived from the ontology KB and cross-validated by engineering_estimate.
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)：std:NFPA 20 — Standard for the Installation of Stationary Pumps for Fire Protection · 机理级工程估计，非实测；引用 governing standard 作为分类出处
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
NFPA 20
No separate clause reference.
6Derived Analysis (seeded from this FM)
7/3/5FMEA Sev/Occ/Det
0.04RBI λ
0.95Monitor pdet
6 月Insp. int.
Current tasks:止回阀检查
RCFA incident:止回阀失效/回流：止回阀卡涩/泄漏致停泵时水倒流，后果类型 Operational/Safety，严重度 7
7RCM Maintenance Decision (strategy landing)
CBMOn-Condition Maintenance
Recommended task标定/零点-跨度校验 + SIL Proof test + 阀门行程试验 + 变更管理; 泄漏监测 + 密封/填料定期更换, 螺栓热紧固
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=instrument; seal_leak
Governing standardsAPI 510API 682GB/T 21109IEC 61511ISA 84
⚠ 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。