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Equipment SP-101
FM cavitation
ISO 14224 mode
Source synthetic + standards-based engineering estimate (ISO 14224 / API 676 / API 674 framework)
汽蚀(NPSH 不足)
SP-101 · 螺杆泵/齿轮泵/凸轮泵 (Rotary Positive Displacement Pump)
Related equipment → SP-101
0.80Source conf.
—Evidence conf.
ISO 14224 mode
1Failure Mechanism
Function:入口建立足够压力避免介质汽化
Failure cause:有效 NPSH 低于必需 NPSH 致汽蚀
Damage mechanism：入口压力低于饱和蒸汽压, 气泡溃灭产生微射流冲击表面
2Source Basis (where this FM comes from)
synthetic + standards-based engineering estimate (ISO 14224 / API 676 / API 674 framework)
Source confidence 0.80: this FM is derived from the ontology KB and cross-validated by synthetic + standards-based engineering estimate (ISO 14224 / API 676 / API 674 framework).
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:API 676 — Rotary Positive Displacement Pumps · 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 3 real accident investigation(s); tap the report no. to open the corresponding accident lesson card.
5Applicable Standards & Clauses
API 676ISO 14224:2016API 580GB/T 7784GB/T 10886SH/T 3140ISO 13372GB/T 6075SAE JA1011_202411GB/T 28267
No separate clause reference.
6Derived Analysis (seeded from this FM)
6/3/4FMEA Sev/Occ/Det
0.15RBI λ
0.75Monitor pdet
12 月Insp. int.
Current tasks:监测入口压力与温度 | 噪声/振动特征分析 | 检查转子表面蚀坑
RCFA incident:汽蚀损伤转子型面与壳体, 后果类型 Operational, 严重度 6
7RCM Maintenance Decision (strategy landing)
CBMOn-Condition Maintenance
Recommended task标定/零点-跨度校验 + SIL Proof test + 阀门行程试验 + 变更管理; 入口压力/温度监测 + 叶轮表面蚀坑检查, 优化 NPSH 工况; 绝缘/电气试验 + 继电保护定值校核 + 操动机构特性测试; 振动频谱分析 + 动平衡 + 激光对中, 状态监测趋势管理; 温度/红外热成像监测, 超温报警与根因排查
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=cavitation; electrical; instrument; overheat; vibration
Governing standardsAPI 530API 610API 617API 670API 682API 684GB/T 14285GB/T 21109IEC 60034IEC 61511IEEE C57ISA 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。