What Are The Factors Affecting The Bursting Pressure of Hydraulic Tubes?

Hydraulic tubes are an indispensable part of the hydraulic system, and the pressure they can withstand has a certain limit. Its bursting pressure refers to the pressure value at which the pipe is damaged under the action of internal pressure. So, what is the bursting pressure of hydraulic tubes? What are the factors affecting the bursting pressure of hydraulic tubes? How to prevent it?

What is the bursting pressure of hydraulic tubes?

The bursting pressure of hydraulic tubes refers to the pressure value at which the hydraulic tube is damaged under the action of internal pressure. This value is usually 4-5 times the working pressure of hydraulic tubes. According to domestic standards, the working pressure of hydraulic tubes is divided into four types: low pressure, medium pressure, high pressure and ultra-high pressure. The bursting pressure of hydraulic tubes is generally between 100MPa and 150MPa, but the specific value will be affected by many factors such as the material, diameter, wall thickness and use environment of the pipe.

What are the factors that affect the bursting pressure of hydraulic tubes?

There are many reasons that affect the bursting pressure of hydraulic tubes. The common ones mainly include the following:

1. Use of inferior hydraulic tubes

There may be substandard hydraulic tubes on the market, whose performance and reliability are far inferior to regular products. Using such pipes will greatly increase the risk of bursting. The strength, ductility and corrosion resistance of the materials used for pipes (such as mild steel pipe, seamless steel pipe, etc.) directly determine the pressure limit of the pipe. High-quality materials usually have higher bursting pressure.

2. Wall thickness and diameter

The thickness of the pipe wall is an important factor affecting the bursting pressure. Thicker walls usually provide higher strength, but if the design is unreasonable, it may cause problems such as thermal efficiency and structural stress. At the same time, the diameter of the hydraulic tube will also affect the force distribution.

3. Manufacturing process

Whether the precision process is used in the manufacturing process, such as processing accuracy, surface quality, etc., is closely related. Processing defects, welding quality, etc. may reduce the overall performance of the hydraulic tube.

4. Operating environment

Environmental factors such as working temperature, medium characteristics (such as the quality and temperature of hydraulic oil) and fatigue effect under long-term operation will affect the performance of hydraulic tubes, thereby changing the bursting pressure.

5. Pressure fluctuation and stress concentration

In actual operation, the pressure fluctuation and impact load of the hydraulic system may cause stress concentration in the local area of the pipeline, thereby affecting the bursting pressure. Reasonable design of connectors and uniform wall thickness can help alleviate this problem.

Preventive measures for hydraulic tube bursting

In order to prevent hydraulic tube bursting, the following measures can be taken:

1. Select high-quality materials and products

Ensure the use of hydraulic tubes that have undergone strict quality inspection or are produced using seamless technology to reduce the risk of bursting caused by material defects.

2. Reasonable design and calculation

During the design stage, the wall thickness, diameter and other structural parameters are reasonably determined according to the actual working conditions and safety regulations to ensure that the hydraulic tube has sufficient safety margin when it is subjected to working pressure.

3. Strict control of manufacturing process

Adopt advanced manufacturing technology and precision machining technology to reduce machining defects and unevenness, ensure stable product quality, and avoid local stress concentration.

4. Standardized installation and maintenance

During the installation process, strictly follow the operating procedures to ensure that the joints, welding and connectors (such as valve, pipe flange and other components) meet the standard requirements. At the same time, regularly inspect and maintain the system to promptly discover and eliminate hidden dangers.

5. Control the working environment

Reasonably set the working pressure of the hydraulic system to ensure that it does not exceed the design limit; at the same time, use the temperature control device to maintain the hydraulic oil in the appropriate temperature range to prevent seal failure or material performance degradation caused by high temperature.

Summary

The bursting pressure of the hydraulic tube is usually 4-5 times its working pressure, generally between 100MPa and 150MPa, and the specific value depends on the material and diameter of the pipe. The main causes of hydraulic tube bursting include the use of inferior pipes, the thickness and diameter of the pipe wall, and the high temperature of the hydraulic oil. Understanding these factors can help make more reasonable decisions in the design and material selection process, thereby improving the safety and reliability of the system.