← Back to KB navigation
Equipment CV-201A
FM fm_8
ISO 14224 mode OTH Other
Source OPC Ontology KB
Feedback Link Loosening
CV-201A · Control valve
Related equipment → CV-201A
0.75Source conf.
0.70Evidence conf.
OTHISO 14224 mode
1Failure Mechanism
Function:实现设备功能
Failure cause:安装时未按规定扭矩紧固；长期振动导致螺纹松动；温度变化引起材料膨胀差异
2Source Basis (where this FM comes from)
OPC Ontology KBCSB Accident DBNUREG (US NRC)hseQuant benchmark
Source confidence 0.75: this FM is derived from the ontology KB and cross-validated by OPC Ontology KB·CSB Accident DB·NUREG (US NRC)·hse·Quant benchmark.
3Evidence Chain (supporting basis)
Evidence text：None
Evidence conf.：0.7 · Evidence source：OEM_manual
Governing standards (evidence)：ima://7479345845137275/wechatarticle_11035ae55c1b08ddb9e6d8bfbece61fe_71e0997a12b0754a71091e1cbcccab197479345845137275 — 20种阀门常见故障速查（内漏/卡涩/开度异常）ima://7458030677405755/word_11035ae55c1b08ddb9e6d8bfbece61fe_c791ba6bfe6ad927c9b48502742d33147458030677405755 — APPENDIX A8-2 Functionally Critical Valves（杜邦MIQA工具）
4Related Real Accidents (traceable to accident cards)
This FM is recorded in 8 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 44958-2024GB/T 4888-2008GB/T 29639-2020AQ/T 3034-2022API 581API 580API 570API 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
0.8Monitor pdet
4 月Insp. int.
Current tasks:每月检查反馈杆紧固螺栓 | 每周观察阀门行程与指令信号偏差 | 每季度使用振动监测
RCFA incident:CV-201A 发生反馈杆松动，严重程度 5，后果类型 Operational
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; 振动频谱分析 + 动平衡 + 激光对中, 状态监测趋势管理; 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; overheat; vibration
Governing standardsAPI 530API 670API 684GB/T 21109IEC 61511ISA 84ISO 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。