Causes of flange damage in high-flow, high-head multistage pumps

Category: Water pump knowledge

2025-06-14

High-flow, high-head multistage pumps, as important fluid conveying equipment, are widely used in many fields. However, during actual operation, the flange sometimes suffers damage, seriously affecting the normal operation and safety of the equipment. Below, we will discuss in detail the causes of flange damage in high-flow, high-head multistage pumps.

I. Operating Environment Factors

1. High-pressure impact: Under high-head operating conditions, the pump's operating pressure is enormous, and the flange is subjected to strong pressure impacts, easily leading to deformation or damage.

2. Vibration and impact: The vibration and impact generated by the pump during high-speed operation may cause loosening or damage to the flange connection.

II. Manufacturing and Material Issues

1. Insufficient material strength: If the strength of the flange material is insufficient to withstand the impact of high pressure and high flow, it is easily damaged.

2. Manufacturing defects: Defects present during manufacturing, such as casting sand holes and pores, may reduce the strength and durability of the flange.

III. Installation and Maintenance Issues

1. Improper installation: Incorrect alignment during flange installation, insufficient tightening force, or insufficient bolt pre-tightening force may all cause damage during use.

2. Long-term use wear: During long-term operation of the equipment, the flange is subject to wear, reducing its strength and sealing performance.

3. Corrosion: Corrosive substances in the medium may corrode the flange material, reducing its strength and durability.

IV. Operation and Maintenance Management Issues

1. Overload operation: If the pump operates under overload conditions, the stress on the flange will increase, easily leading to damage.

2. Lack of regular inspection and maintenance: Lack of regular inspection and maintenance prevents timely detection and handling of flange problems, potentially leading to damage.

In summary, the causes of flange damage in high-flow, high-head multistage pumps involve multiple aspects, including the operating environment, manufacturing and materials, installation and maintenance, and operation and maintenance management. To ensure the normal operation and safety of the equipment, regular inspection and maintenance of the flange should be strengthened to ensure its normal operation under high-pressure and high-flow operating conditions. Selecting appropriate flange materials and correct installation methods are also key to preventing flange damage.

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