How To Ensure The Corrosion Allowance of Pipe Flanges?

The corrosion allowance of pipe flange refers to the difference between the thickness of the metal material on the sealing surface of the pipe flange and the thickness of the sealing surface of the standard pipe flange. When in use, since the chemical and physical properties of the medium will affect the service life of the pipe flange, it is necessary to consider the corrosion allowance of the pipe flange to ensure the safe and reliable operation of the pipe flange.

Factors affecting flange corrosion allowance:

1. Pressure

Pressure is an important factor affecting the corrosion of pipe flanges. Under high pressure, the pressure on the pipe flange will accelerate the corrosion rate, so it is necessary to consider the strength and pressure resistance of the pipe flange, and appropriately increase the corrosion allowance of the pipe flange.

2. Temperature

Temperature is also one of the factors affecting the corrosion of pipe flanges. Under high temperature, the metal material on the pipe flange is easy to soften and deform, so it is necessary to consider the influence of the material and temperature of the pipe flange on its corrosion rate, and adjust the corrosion allowance of the pipe flange accordingly.

3. Medium

Different media also have different effects on the corrosion rate of pipe flanges. The corrosion rate of acidic and alkaline media is faster, while the corrosion rate of neutral media is slower. Therefore, when selecting the material of the pipe flange, it is necessary to comprehensively consider the properties of the medium and increase the corrosion allowance of the pipe flange according to the actual situation.

How to ensure the corrosion allowance of the pipe flange:

1. Choose the right material

In order to ensure the corrosion allowance of the flange, you first need to choose the right material. When selecting materials, you should decide according to the use environment and conditions of the pipeline. And you need to consider factors such as the strength, corrosion resistance, and wear resistance of the material.

2. Correctly install the flange connection

When installing the flange connection, you need to pay attention to the following points: The bolts of the flange should be tightened evenly to ensure that the stress distribution of all bolts is uniform and reduce the stress caused by thermal expansion and contraction. Avoid using the clamping nut too tight to compress the flange sealing surface to produce excessive stress, resulting in leakage and deformation. To avoid flange corrosion, protective materials such as PVC, fiberglass and other materials should be used for protection.

3. Regularly check the corrosion of the pipeline

In order to better ensure the corrosion allowance of the pipe flange, it is necessary to regularly check the corrosion of the pipeline. If oxidation corrosion is found in the pipeline, timely maintenance and repair should be carried out. At the same time, the anti-corrosion measures of the pipeline should be strengthened to reduce the occurrence of oxidation corrosion.

Conclusion

The corrosion allowance of pipe flanges plays a very important role in the safe use of pipe flanges. When using it, you need to consider many factors, have a deep understanding of the flange maintenance method with the flange supplier, and make corresponding adjustments according to the actual situation. Through reasonable maintenance measures, the long-term safe and reliable operation of the pipeline flange can be guaranteed.