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Equipment H-101
FM seat_leakage
ISO 14224 mode ELP External leakage - process
Source OPC Ontology KB
Valve Seat Leakage
H-101 · fired_heater
Related equipment → H-101
0.82Source conf.
0.70Evidence conf.
ELPISO 14224 mode
1Failure Mechanism
Function:熄火或紧急情况时快速切断燃料
Failure cause:燃料气中杂质磨损密封面；长期未动作导致密封面结垢；执行机构关闭力不足或行程不到位
Damage mechanism：燃料气杂质磨损/结垢（seat leakage, erosion/fouling）
2Source Basis (where this FM comes from)
OPC Ontology KBCSB Accident DBQuant benchmark
Source confidence 0.82: this FM is derived from the ontology KB and cross-validated by OPC Ontology KB·CSB Accident DB·Quant benchmark.
3Evidence Chain (supporting basis)
Evidence text：None
Evidence conf.：0.7 · Evidence source：engineering_estimate
Governing standards (evidence)：std:API-570 — API 570 — Piping Inspection Code · 工艺管道检验std:API-574 — API 574 — Inspection Practices for Piping System Components · 管道元件检验
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 580GB/T 7826-2012ISO 14224:2016SAE JA1011_202411
Standard clause references (22):
GB/T 7826-2012GB/T 27921-2011GB/T 36894-2018GB/T 44958-2024GB/T 37243-2019GB/T 4888-2008GB/T 29639-2020AQ/T 3034-2022API 581API 580API 510API 570API 571API 579-1/ASME FFS-1API 754API 576API 689API 755ISO 14224:2016ISO 20815:2018IEC 61511:2016ISO 31000:2018
6Derived Analysis (seeded from this FM)
10/6/2FMEA Sev/Occ/Det
0.46RBI λ
0.8Monitor pdet
1 月Insp. int.
Current tasks:定期更换密封件 | 测试执行机构动作 | 建立SIL评估（按IEC 61511）确定安全完整性等级 | 每1个月执行proof test验证保护层有效性
RCFA incident:H-101 发生阀座泄漏 (Seat Leakage)，严重程度 10，后果类型 Safety/Environmental
7RCM Maintenance Decision (strategy landing)
RTFDesign Modification / Inspection Task
Recommended task按压差/效率监测设定清洗周期 + 过滤/防堵维护; 泄漏监测 + 密封/填料定期更换, 螺栓热紧固; 壁厚/型线超声测厚 + 耐磨层状态检查, 视情修复或涂层; 无损检测(UT/VT/MT/PT), 按 API 581 RBI 风险定级设定检验间隔; 防静电/惰化/接地设计整改 + 环境控制(RTF)
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=corrosion; erosion; fouling; seal_leak; static
Governing standardsAPI 510API 570API 571API 581API 682GB 50058IEC 60079NFPA 77厂家规范
⚠ 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。