Issues with mating flanges for ceramic-lined pipelines
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If the outer diameter of the ceramic-lined steel pipe is 232 mm, what standard should be used when selecting flanges?
When selecting flanges, the choice is generally made based on factors such as the nominal diameter of the pipeline, pressure rating, and connection method. In your case, the outer diameter of the ceramic-lined steel pipe is 232 mm. If the selection is to be made according to the dimensions specified in the Machinery Industry Standards of the People’s Republic of China (JB/T 79.1-94 \"Plain Steel Flanges\"), then a DN200 flange should be chosen. However, selecting a flange based solely on the outer diameter is not accurate; information such as the pipe’s wall thickness and operating pressure is also required. For specific practical operations, please refer to the advice and calculations of professionals. .
First, I would like to express my gratitude. Isn’t JB/T 79.1-94 already obsolete? What I want to know is: if the outer diameter of the pipe is 232, does that mean the flange has to be custom-made? Or are there standards that allow for the use of standard flanges? Can a DN200, PN16 flange be used with an outer diameter of 232?
It’s strange why the design doesn’t provide levels