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Equipment BL-201A
FM fm_8
ISO 14224 mode STD Structural deficiency
Source OPC Ontology KB
Dew-point Corrosion Perforation
BL-201A · Boiler
Related equipment → BL-201A
0.82Source conf.
0.85Evidence conf.
STDISO 14224 mode
1Failure Mechanism
Function:烟气余热预热给水
Failure cause:燃料含硫量高，烟气露点温度高；给水温度过低导致管壁温度低于露点；运行中过量空气系数控制不当
Damage mechanism：烟气酸露点腐蚀（acid dew-point corrosion, SO3+H2O→H2SO4）+ 低温壁面冷凝穿孔
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)：std:API-571 — API 571 — Damage Mechanisms Affecting Fixed Equipment · 损伤机理归类框架std:NBIC-NB23 — NBIC NB-23 — National Board Inspection Code · 国家锅炉压力容器检验规范std:ASME-BPVC-I — ASME BPVC Section I — Rules for Construction of Power Boilers · 锅筒/受热面建造与检验规则（PG-19 等）
4Related Real Accidents (traceable to accident cards)
This FM is recorded in 2 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)
7/4/3FMEA Sev/Occ/Det
0.34RBI λ
0.8Monitor pdet
4 月Insp. int.
Current tasks:每日监测排烟温度和给水温度 | 每月进行壁厚测量 | 每季度计算或在线监测烟气露点温度 | 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:BL-201A 发生露点腐蚀穿孔，严重程度 7，后果类型 Safety
7RCM Maintenance Decision (strategy landing)
CBMOn-Condition Maintenance
Recommended task温度/红外热成像监测, 超温报警与根因排查; 无损检测(UT/VT/MT/PT), 按 API 581 RBI 风险定级设定检验间隔; 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=corrosion; instrument; overheat; seal_leak
Governing standardsAPI 510API 530API 570API 571API 581API 682GB/T 21109IEC 61511ISA 84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。