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Equipment M-201A
FM fm_28
ISO 14224 mode ELP External leakage - process
Source OPC Ontology KB
Tube-bundle Leak
M-201A · MVR unit (mechanical vapor recompression)
Related equipment → M-201A
0.75Source conf.
0.80Evidence conf.
ELPISO 14224 mode
1Failure Mechanism
Function:冷凝不凝气夹带的蒸汽，维持真空
Failure cause:冷却水腐蚀性；管束振动疲劳；制造缺陷或安装应力
2Source Basis (where this FM comes from)
OPC Ontology KBChina Emergency MgmtQuant benchmark
Source confidence 0.75: this FM is derived from the ontology KB and cross-validated by OPC Ontology KB·China Emergency Mgmt·Quant benchmark.
3Evidence Chain (supporting basis)
Evidence text：Review of a UNS N04400 Heat Exchanger Tube Failure in Cooling Water Service (2018)
Evidence ref code：S2:003ed19d0856f7e7
Evidence conf.：0.8 · Evidence source：Industry consensus
⚠ The evidence ref code S2:003ed19d0856f7e7 is an internal index code of this KB, for tracing back to the offline curated corpus; it is not a public doi.org link, hence no hyperlink is provided.
Governing standards (evidence)：ima://7458030677405755/word_11035ae55c1b08ddb9e6d8bfbece61fe_c34878de0ef99baefb229cbae10a3b8b7458030677405755 — ITP-9 Skidded Equipment（杜邦制造质量检验测试计划）
4Related Real Accidents (traceable to accident cards)
This FM is recorded in 1 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 (17):
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 754API 689API 755ISO 14224:2016ISO 20815:2018IEC 61511:2016ISO 31000:2018
6Derived Analysis (seeded from this FM)
8/4/4FMEA Sev/Occ/Det
0.34RBI λ
0.55Monitor pdet
4 月Insp. int.
Current tasks:每运行8000小时进行壳程压力试验，保压30分钟无压降 | 每年进行氦检漏，检测泄漏率不超过1×10^-6 Pa·m³/s | 每季度进行超声波测厚，当壁厚减薄超过20%时更换管束
RCFA incident:M-201A 发生管束泄漏，严重程度 8，后果类型 Safety
7RCM Maintenance Decision (strategy landing)
CBMOn-Condition Maintenance
Recommended task泄漏监测 + 密封/填料定期更换, 螺栓热紧固; 无损检测(UT/MT/PT) 监测裂纹萌生, 关键转动件定时拆检; 振动频谱分析 + 动平衡 + 激光对中, 状态监测趋势管理; 无损检测(UT/VT/MT/PT), 按 API 581 RBI 风险定级设定检验间隔; 温度/红外热成像监测, 超温报警与根因排查
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; fatigue; overheat; seal_leak; vibration
Governing standardsAPI 510API 530API 570API 571API 579API 581API 612API 670API 682API 684ASME VIIIISO 10816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。