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Equipment PP-101
FM flange_gasket_leak
ISO 14224 mode ELP External leakage - process
Source Synthetic
法兰-垫片密封泄漏（Flange/Gasket Leak）
PP-101 · Piping
Related equipment → PP-101
0.82Source conf.
0.40Evidence conf.
ELPISO 14224 mode
1Failure Mechanism
Function:输送工艺流体，维持设计压力与流量
Failure cause:螺栓预紧不均；垫片老化/选型错；法兰面损伤；热循环松弛
2Source Basis (where this FM comes from)
SyntheticCSB Accident DBPublic newsNUREG (US NRC)Quant benchmark
Source confidence 0.82: this FM is derived from the ontology KB and cross-validated by Synthetic·CSB Accident DB·Public news·NUREG (US NRC)·Quant benchmark.
3Evidence Chain (supporting basis)
Evidence text：None
Evidence conf.：0.4 · Evidence source：synthetic
Governing standards (evidence)：ima://7458030677405755/word_11035ae55c1b08ddb9e6d8bfbece61fe_9e91b9cfd6d537bf9426fc2acf0b97a27458030677405755 — ITP-3 Piping（杜邦制造质量检验测试计划）ima://7458030677405755/word_11035ae55c1b08ddb9e6d8bfbece61fe_ba6bf0b46e5c0701a71c71f6cf627fbf7458030677405755 — ITP-11 Piping-RTP（杜邦制造质量检验测试计划）
4Related Real Accidents (traceable to accident cards)
This FM is recorded in 6 real accident investigation(s); tap the report no. to open the corresponding accident lesson card.
5Applicable Standards & Clauses
API 570API 574API 571API 581ISO 14224:2016API 580GB/T 20801GB/T 44692
Standard clause references (5):
API 570API 571API 581GB/T 20801ISO 14224:2016
6Derived Analysis (seeded from this FM)
6/5/3FMEA Sev/Occ/Det
0.4RBI λ
0.55Monitor pdet
4 月Insp. int.
Current tasks:定期法兰螺栓紧固状态检查；热紧固（升温后复紧）
RCFA incident:PP-101 发生法兰-垫片密封泄漏，严重程度 6，后果类型 Safety/Operational
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。