Causes of pipeline rupture in high-flow, high-head multistage pumps

Category: Water pump knowledge

2025-06-09

High-flow, high-head multistage pumps are widely used in water conservancy projects and industrial applications. However, pipe rupture sometimes occurs during operation, affecting normal operation and potentially causing safety hazards. The following are the main causes of pipe rupture in high-flow, high-head multistage pumps.

I. Pump Factors

1. High-head pumps generate high pressure, increasing stress on the pipes and the risk of rupture.

2. The internal structure of multistage pumps is complex. If the design of a certain impeller passage is improper or defective, it may lead to unstable fluid dynamics, causing pipe vibration and eventual fatigue rupture.

II. Medium Factors

If the fluid medium contains corrosive substances or particles, long-term impact on the inner wall of the pipe will cause corrosion and wear, reducing the pipe strength and ultimately leading to rupture. In addition, the impact force of high-velocity fluid on the pipe cannot be ignored.

III. Environmental Factors

1. Large temperature fluctuations in the environment where the pipe is located can cause thermal expansion and contraction of the material, resulting in stress concentration and fatigue rupture.

2. Pumps installed in areas with active geological conditions such as earthquakes are affected by ground vibrations, resulting in complex stress on the pipes and an increased risk of rupture.

IV. Installation and Maintenance Issues

1. Improper pipe installation, such as excessive bending or insufficient support, can lead to uneven stress on the pipe and stress concentration.

2. Lack of necessary maintenance and inspection after prolonged use can lead to aging, wear, or corrosion of the pipe, reducing its strength.

3. Failure to follow the prescribed operating procedures during on/off operations can cause instantaneous high pressure that the pipe cannot withstand, leading to rupture.

V. Other Factors

The quality of the pipe material is also a key influencing factor. Low-quality materials may result in insufficient pipe strength and susceptibility to rupture. In addition, external impacts and misoperation can also cause pipe rupture.

In summary, pipe rupture in high-flow, high-head multistage pumps is the result of the combined effects of pump characteristics, medium characteristics, environmental factors, installation and maintenance issues, and material quality. Therefore, these factors should be fully considered during selection, installation, use, and maintenance, and appropriate preventive measures should be taken to ensure safe operation of the equipment.

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