Flat-face flanges replace butt-welded flanges
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The material pipeline is designed as a necked butt-welded WN DN300 CL300 20# type; the operating pressure is around 0.7 Mpa, and the temperature is 300°C. Due to procurement issues, the existing flanges are PN16 DN300 necked flat-welded SO type. Can SO flanges be used in place of WN flanges, and are there any potential risks? Currently, SO flanges are generally used on water pipes. Thank you!
The pressure is not high, the temperature is slightly high; the material is acceptable, and ordinary materials can fully serve as a substitute.
It’s fine to use it on water pipes; just keep in mind that WN can perform RT testing while SO cannot
It’s not possible if it’s a flammable medium.
1. SO flanges are typically used for utility media; process media should be avoided as much as possible (if use is necessary, it depends on the properties of the medium, and they should be used in low-temperature and low-pressure applications). 2. \"The operating pressure is around 0.7 Mpa, with a temperature of 300°C,\" which can be considered as the operating conditions; the design temperature and pressure should be higher. Check the flange temperature-pressure ratings; the design operating conditions are relatively close to the allowable operating pressure of PN16 20# (1.12 MPa). Considering the additional stress on the pipes at around 300°C as well, replacement is not recommended.
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