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Equipment CV-201A
FM fm_2
ISO 14224 mode OTH Other
Source OPC Ontology KB
Valve-seat Surface Damage -> Internal Leak
CV-201A · Control valve
Related equipment → CV-201A
0.82Source conf.
0.85Evidence conf.
OTHISO 14224 mode
1Failure Mechanism
Function:实现设备功能
Failure cause:介质含硬质颗粒；频繁开关操作；密封面材料不耐磨
2Source Basis (where this FM comes from)
OPC Ontology KBQuant benchmarkCSB Accident DBNUREG (US NRC)hse
Source confidence 0.82: this FM is derived from the ontology KB and cross-validated by OPC Ontology KB·Quant benchmark·CSB Accident DB·NUREG (US NRC)·hse.
3Evidence Chain (supporting basis)
Evidence text：None
Evidence conf.：0.85 · Evidence source：Industry consensus
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)
7/3/4FMEA Sev/Occ/Det
0.28RBI λ
0.55Monitor pdet
4 月Insp. int.
Current tasks:每月关闭阀门后监测下游压力上升 | 每季度声发射检测泄漏 | 每年检查密封面
RCFA incident:CV-201A 发生阀座表面损伤→内漏，严重程度 7，后果类型 Operational
7RCM Maintenance Decision (strategy landing)
RTFDesign Modification / Inspection Task
Recommended task材质复检 + 无损检测 + 设计/材质升级整改(RTF); 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; 壁厚/型线超声测厚 + 耐磨层状态检查, 视情修复或涂层; 无损检测(UT/VT/MT/PT), 按 API 581 RBI 风险定级设定检验间隔
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; erosion; instrument; material; seal_leak
Governing standardsAPI 510API 570API 571API 579API 581API 682ASME VIIIGB/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。