Reasons and solutions for flange leakage during valve use
Thread Content
After the flash valve has been used for a period of time, the flange gasket at the connection with the pipeline leaks and fails.: What is the reason for this gasket failure? Are there any effective measures to solve or improve gasket failure?
It seems support and stress problem. You can check stress analysis operation case. Another problem is material quality, you can check material certificate and inspection report. In the other hand, installation shall be checked through pressure test also.
Check whether the gasket selection is reasonable (whether it meets the working pressure, temperature, and corrosive requirements) and whether the installation is reasonable (bolts should be tightened evenly)
Gasket seal failure, choose a gasket that meets your needs. Select method: 1. Confirm the standard and flange surface form of your flange. 2. Confirm the passing fluid elements; temperature, pressure, medium. 3. After confirming the above, you can confirm the gasket material and gasket form.
Flash valve? I guess it's because the pipeline is vibrating too much? If this is the case, then you have to start by reducing the vibration value of the pipeline!
Replace with a mat that can withstand high temperatures and pressures, such as a steel mat.
The author didn't explain what medium he used? If it is a low-temperature liquid, it must be fully pre-cooled. If it is a high-temperature steam, the pipe must be fully warmed. During the pre-cooling and preheating processes, the valve must not be opened too large, otherwise it will easily cause flange leakage.
If it is just a gasket problem, it is easy to solve. If the installation and tightening procedures are incorrect, it is easy to solve. The most fearful thing is leakage caused by stress deformation caused by structure, material, and temperature. There are two options to solve the problem at this time:: 1. Online trimming, nothing else, leak sealing under pressure. You can give me a call and take care of business. 2. Stop the machine for rectification. Even if the most feared situation occurs, it will be difficult to rectify the shutdown. hehe.