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Equipment AC-201A
FM fm_2
ISO 14224 mode LOO Low output
Source OPC Ontology KB
Internal Fouling -> Heat-transfer Loss
AC-201A · Air cooler
Related equipment → AC-201A
0.82Source conf.
0.85Evidence conf.
LOOISO 14224 mode
1Failure Mechanism
Function:扩展换热面积
Failure cause:冷却水质差，含钙镁离子或悬浮物；流速过低导致沉积；缺乏定期清洗
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.：0.85 · Evidence source：Industry consensus
Governing standards (evidence)：ima://7458030677405755/word_11035ae55c1b08ddb9e6d8bfbece61fe_33ff8131b5334d53b2789bdf1e4abda87458030677405755 — ITP-1 Air Cooled Exchangers（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 (19):
GB/T 7826-2012GB/T 27921-2011GB/T 44958-2024GB/T 4888-2008GB/T 29639-2020AQ/T 3034-2022API 581API 580API 510API 571API 579-1/ASME FFS-1API 754API 576API 689API 755ISO 14224:2016ISO 20815:2018IEC 61511:2016ISO 31000:2018
6Derived Analysis (seeded from this FM)
5/3/3FMEA Sev/Occ/Det
0.28RBI λ
0.55Monitor pdet
4 月Insp. int.
Current tasks:每月监测进出口温差 | 每3个月测量压差
RCFA incident:AC-201A 发生管内结垢→换热下降，严重程度 5，后果类型 Operational
7RCM Maintenance Decision (strategy landing)
CBMOn-Condition Maintenance
Recommended task按压差/效率监测设定清洗周期 + 过滤/防堵维护; 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=fouling; overheat
Governing standardsAPI 530API 571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。