Causes of damage to the flange of a high-efficiency energy-saving split-case pump

Category: Water pump knowledge

2025-08-04

High-efficiency energy-saving split-case pumps are widely used in industrial fluid transportation. Their flanges are crucial components connecting the pump body and pipelines. However, during operation, various factors can cause flange damage. The following are some of the main causes of damage.

I. Mechanical Stress

1. Vibration: During pump operation, fluid dynamics can cause vibrations. Prolonged exposure to these vibrations can lead to repeated stress on the flange, resulting in fatigue damage.

2. Pressure Fluctuations: Large pressure fluctuations in the pipeline, exceeding the flange's tolerance, can cause deformation or cracking.

II. Chemical Corrosion

1. Corrosive Media: When transporting corrosive media, the flange's metal material may corrode, reducing its strength and causing pitting.

2. Chemical Reactions: Chemical reactions between the media and the pump or flange material can produce corrosive byproducts, accelerating flange damage.

III. Installation Issues

1. Incorrect Installation: Insufficient or uneven bolt pre-tightening during installation can lead to uneven stress on the flange connection, making it prone to damage.

2. Pipeline Stress: Stress concentration due to improper pipeline installation can also affect the normal use of the flange.

IV. Material Issues

1. Improper Material Selection: Failure to fully consider media characteristics, such as corrosiveness, when selecting flange materials can lead to unsuitable material choices.

2. Material Defects: Defects such as pores or inclusions present in the flange during manufacturing can reduce the material's mechanical properties.

V. Operation and Maintenance

1. Improper Operation: Improper setting of operating parameters during operation, such as excessive flow rate or pressure fluctuations, exceeding the equipment's tolerance.

2. Lack of Maintenance: Failure to conduct regular inspections and maintenance after prolonged operation can lead to flange aging and wear.

In summary, flange damage in high-efficiency energy-saving split-case pumps involves multiple factors, including mechanical stress, chemical corrosion, installation issues, material problems, and operation and maintenance. To avoid damage, appropriate materials should be selected, correct installation procedures followed, operating parameters optimized, regular maintenance performed, and abnormal conditions during operation monitored.

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