# Technical Diagnostic Report: Centrifugal Pump B-102 ## 1. Executive Summary Following the inspection conducted on May 5, 2026, centrifugal pump B-102 exhibits critical mechanical and operational deviations. The unit is currently operating outside its design parameters, posing a significant risk of catastrophic failure and potential safety hazards due to seal leakage and elevated thermal signatures. ## 2. Technical Observations and Fault Analysis ### 2.1 Hydraulic Performance Degradation The unit is recording a discharge pressure of **45 psi**, representing a **25% loss in head** relative to the nominal setpoint of **60 psi**. This drop indicates internal recirculation, impeller wear, or significant flow restriction, likely exacerbated by the mechanical issues identified. ### 2.2 Mechanical Integrity and Vibration * **Acoustic Profile:** The "metallic noise" reported is symptomatic of internal component interference, possibly involving the impeller contacting the casing or bearing race degradation. * **Vibration:** Visual confirmation of out-of-tolerance shaft vibration suggests misalignment or unbalanced rotating elements. Given the noise, a bearing failure (L10 life expiration) is highly probable. * **Sealing System:** The oil leak at the mechanical seal indicates a compromise in the primary or secondary sealing faces. This leads to loss of lubrication and potential environmental contamination. ### 2.3 Thermal and Maintenance Status * **Thermal Profile:** An operating temperature of **85°C** is considered high for standard centrifugal applications and indicates excessive friction at the bearing housing or seal faces. * **Maintenance Gap:** The equipment has exceeded standard preventive maintenance intervals (8 months of inactivity). This violates typical ISO 14224 reliability standards for rotating equipment in industrial service. ## 3. Engineering Root Cause Analysis (Preliminary) Based on the convergence of low pressure, high vibration, and metallic noise, the primary failure mode is diagnosed as **Bearing Assembly Failure** leading to **Shaft Deflection**. This deflection has caused the mechanical seal to weep and is likely causing the impeller to rub against the wear rings, accounting for the pressure drop and noise. ## 4. Immediate Action Plan (IAP) ### Phase 1: Emergency Shutdown (Immediate) * **Action:** Execute immediate controlled shutdown of B-102. * **Rationale:** To prevent shaft seizure or catastrophic casing breach. Operating at 85°C with high vibration levels exceeds safe operating limits (referencing ISO 10816 for vibration severity). * **Safety:** Follow LOTO (Lockout/Tagout) protocols on the motor starter and isolate suction/discharge valves. ### Phase 2: Inspection and Correction (0-24 Hours) * **Visual/Dimensional Check:** Once cooled, perform a shaft runout test. * **Seal Replacement:** Replace the mechanical seal and inspect the sleeve for scoring. * **Lubrication:** Drain and flush the bearing housing to inspect for metallic particulates. * **Alignment:** Perform a laser alignment between the motor and pump shafts to meet a tolerance of ±0.05mm or better. ### Phase 3: Documentation and Reliability * **Manual Retrieval:** Source the digital Twin/PDF manual from the manufacturer's repository immediately to establish correct torque specs and clearance tolerances. * **PM Scheduling:** Re-establish the preventive maintenance schedule within the CMMS Computerized Maintenance Management System.