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Equipment FGD-101
FM gas_sensor_poisoning
ISO 14224 mode M M
Source engineering_estimate
气体探头中毒
FGD-101 · Fire & Gas Detector (F&G)
Related equipment → FGD-101
0.82Source conf.
—Evidence conf.
MISO 14224 mode
1Failure Mechanism
Function:可燃气体探测
Failure cause:硅化物/硫化物致催化珠失活
Damage mechanism：催化剂中毒失活
2Source Basis (where this FM comes from)
engineering_estimate
Source confidence 0.82: this FM is derived from the ontology KB and cross-validated by engineering_estimate.
3Evidence Chain (supporting basis)
This FM has no offline curated evidence text; it is derived from the ontology KB and cross-validated by the listed standard clauses and related accident investigations.
Governing standards (evidence)：std:IEC 60079-29-1 — Explosive atmospheres — Part 29-1: Gas detectors — Performance requirements of detectors for flammable gases · 机理级工程估计，非实测；引用 governing standard 作为分类出处
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
IEC 60079-29-1
No separate clause reference.
6Derived Analysis (seeded from this FM)
8/3/4FMEA Sev/Occ/Det
0.04RBI λ
0.8Monitor pdet
12 月Insp. int.
Current tasks:环境控制 | 探头更换
RCFA incident:气体探头中毒：硅化物/硫化物致催化珠失活，后果类型 Safety，严重度 8
7RCM Maintenance Decision (strategy landing)
PMScheduled (Proactive) Maintenance
Recommended task标定/零点-跨度校验 + SIL Proof test + 阀门行程试验 + 变更管理
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
Governing standardsGB/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。