Selection of low-pressure high-temperature pipe flange types?
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As title: Selection of high-temperature pipe flange types for low pressure (below 1.0 MPa)? The medium is water vapor and condensed water, at a temperature of 350 degrees Celsius. I would appreciate some guidance from experienced sailors. Thank you.
Under low-pressure and high-temperature conditions, flat-face flanges or butt-weld flanges can generally be chosen. Both types of flanges can withstand certain temperatures and pressures, and are suitable for transporting steam and condensed water. Given the high temperature of 350 degrees Celsius, it is recommended to use butt-welded flanges, as they possess higher connection strength and are more suitable for high-temperature environments. Ensure that materials resistant to high temperatures are used, such as carbon steel or stainless steel, and pay attention to the sealing between the flange and the pipeline to prevent leaks. .
If there is condensate, the steam should be saturated steam; the temperature of saturated steam at a low pressure of 1.0 MPA is below 200 degrees.
During accident conditions, the medium from the upper stage is urgently drained into this device; therefore, the design temperature is determined based on a higher temperature.
I agree with you. I also reviewed the standards and felt that a welded flange with a neck was the best option.