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Equipment P-101A FM anchor_bolt_loosening ISO 14224 mode STD Structural deficiency Source OPC Ontology KB
地脚螺栓松动/腐蚀 (Anchor Bolt Loosening)
P-101A · Centrifugal pump
Related equipment → P-101A
0.75Source conf.
0.60Evidence conf.
STDISO 14224 mode
1Failure Mechanism

Function:提供刚性支撑，吸收振动

Failure cause:初始预紧力不足；长期振动导致螺母松动；环境腐蚀导致螺栓截面减小

2Source Basis (where this FM comes from)
OPC Ontology KBCSB Accident DBNUREG (US NRC)Quant 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)·Quant benchmark.

3Evidence Chain (supporting basis)
Evidence text：None
Evidence conf.：0.6 · Evidence source：engineering_estimate
Governing standards (evidence)：
  • ima://7479345845137275/wechatarticle_11035ae55c1b08ddb9e6d8bfbece61fe_283b5a73620a2a66736f9bc2640d5c2a7479345845137275 — 离心泵结构原理及常见故障原因分析
  • ima://7479345845137275/wechatarticle_11035ae55c1b08ddb9e6d8bfbece61fe_8a1d60fcb81b5086bdefbc680fe61bd57479345845137275 — 离心泵叶轮常见故障分析及避免策略
  • ima://7479345845137275/wechatarticle_11035ae55c1b08ddb9e6d8bfbece61fe_9b8c77c034c4d40cd470345085c90c9c7479345845137275 — 装置离心泵振动九大杀手排查
  • ima://7479345845137275/wechatarticle_11035ae55c1b08ddb9e6d8bfbece61fe_e433bfbdf4a9a4b807fc752c6d3e429d7479345845137275 — 离心泵运行中常见的八类隐形杀手及对策
  • ima://7479345845137275/wechatarticle_11035ae55c1b08ddb9e6d8bfbece61fe_d8bc091028963fe6986a324f751866257479345845137275 — 机械密封维护检修规程
  • ima://7458030677405755/word_11035ae55c1b08ddb9e6d8bfbece61fe_b8e3f40c0cbcc204999d1c296cc7b2467458030677405755 — ITP-7 Pumps（杜邦制造质量检验测试计划）
4Related Real Accidents (traceable to accident cards)
2020-01-I-TX2019-01-I-TX2004-08-I-NM2019-03-I-TXNUREG-LER-2019-001NUREG-PNO-2013-006

This FM is recorded in 6 real accident investigation(s); tap the report no. to open the corresponding accident lesson card.

5Applicable Standards & Clauses
API 571API 579-1/ASME FFS-1API 580API 581-2025GB/T 44692GB/T 7826-2012ISO 14224:2016SAE JA1011_202411

Standard clause references (16):

GB/T 7826-2012GB/T 27921-2011GB/T 44958-2024GB/T 4888-2008GB/T 29639-2020AQ/T 3034-2022API 581API 580API 571API 754API 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:每季度使用扭矩扳手检查地脚螺栓预紧力 | 每年进行腐蚀检查

RCFA incident:P-101A 发生地脚螺栓松动/腐蚀 (Anchor Bolt Loosening)，严重程度 7，后果类型 Safety

7RCM Maintenance Decision (strategy landing)
CBMOn-Condition Maintenance
Recommended task无损检测(UT/VT/MT/PT), 按 API 581 RBI 风险定级设定检验间隔; 振动频谱分析 + 动平衡 + 激光对中, 状态监测趋势管理
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=corrosion; vibration
Governing standards
API 570API 571API 581API 670API 684ISO 10816
⚠ 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。
FM anchor_bolt_loosening · Data from OPC KB and whitelisted public sources, compiled by Reliability AI for reliability demonstration only. Evidence ref codes are internal indices, not public DOIs.