Centrifugal Pump Inspection

Oil equiepment, centrifugal pump technical inspection before shipment.

Pump technical inspection, functional testing, material PMI testing.

Detection Scope
This project’s detection scope covers various types of water pumps, including but not limited to: heating water pumps, submersible pumps, mixed-flow pumps, cooling water pumps, electric water pumps, centrifugal pumps, feed water pumps, drainage pumps, horizontal pumps, vertical pumps, inclined pumps, single-stage pumps, multi-stage pumps, single suction pumps, double suction pumps, directly connected pumps, gear-driven pumps, self-priming pumps, boiler feed water pumps, circulating pumps, sewage pumps, fire pumps, process pumps, booster pumps, corrosion-resistant pumps, cast iron pumps, stainless steel pumps, plastic pumps, fluoroplastic pumps, engineering plastic pumps, etc. Testing items
Appearance and structure inspection: Conduct a detailed visual inspection of the pump body surface, carefully checking for any physical damages such as cracks, corrosion, and deformation; inspect the tightness of the flange connection and the foundation fixation to ensure the integrity of the overall equipment structure.
Performance parameter testing: Use professional detection tools such as flow meters and pressure gauges to accurately measure the actual flow rate, head, power, etc. of the pump, and conduct in-depth comparison and analysis of the measured values with the rated values. Pay special attention to situations where efficiency drops by more than 10%, as this may indicate wear on the impeller or blockage in the flow channel.
Sealing system inspection: Use an airtightness test to check the leakage of mechanical or packing seals, and use an infrared thermal imager to monitor for any abnormal temperatures in the sealing area. For high-pressure pumps, conduct a pressure retention test for at least 30 minutes to ensure reliable sealing performance.
Vibration and noise analysis: Use a vibration spectrum analyzer to detect the vibration speed values at the bearing area to assess the rotor’s dynamic balance state; use a sound level meter to measure the noise generated by the pump during operation. If abnormal high-frequency noise is detected, it may indicate the occurrence of cavitation.
Electrical system diagnosis: Test the insulation resistance of the motor (standard value ≥ 1 MΩ), the three-phase current balance degree (deviation ≤ 10%), and use a thermal imager to check for overheating issues at the connection terminals to ensure the sensitivity and reliability of the control system’s protection devices.
Material corrosion assessment: Use an ultrasonic thickness gauge to measure the thickness of the flow components and compare it with the initial wall thickness data. Check the depth of corrosion pits on parts such as the impeller and pump casing, and for severe corrosion, conduct further material composition analysis.
Bearing and lubrication inspection: Remove and inspect the wear marks on the bearing raceways, measure the changes in clearance. Conduct spectral analysis of the lubricating oil to detect the content of metal particles, and replace the lubricant immediately if the iron element concentration exceeds 100 ppm.
Intelligent diagnosis and data recording: Install an online monitoring system to collect key parameters such as vibration, temperature, and pressure during the pump’s operation in real time, establish a detailed operation database. Use trend analysis to predict the remaining service life of the pump and formulate scientific and reasonable preventive maintenance plans. Testing basis

The inspection work is mainly carried out in accordance with the standards such as GB/T3216 “Acceptance Test for Rotating Power Pumps” and API610 “Centrifugal Pumps for the Petroleum, Heavy Chemical and Natural Gas Industries”.