Regarding the classification of pressure pipelines for the outer tube of small-diameter steam jacketed tubes
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Hello, sea friend! Question: For a steam jacket, with the inner tube having a diameter of DN50 and the outer tube having a diameter of DN80, should the steam pipeline connected to the outer tube be classified as GC3? The actual steam flow area of the aforementioned jacketed tube is equivalent to that of a DN50 pipe, which is ((80^2-60^2)^0.5) mm. For pressure pipelines, the pipe diameter is required to be at least DN50; does this mean they can be classified as GC3?
The severity of accidents in pressure pipelines is proportional to the pipe diameter and has little relation to the flow area; therefore, this category should be classified as GC3.
It is also necessary to check the pressure and temperature of the steam pipeline