How to select the wall thickness of a torch pipeline?
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The torch lines are DN50 and DN100, with a design pressure of 2 Mpa (which is a bit high), an operating pressure of 0.1 Mpa, and an operating temperature of 40 degrees Celsius. Is choosing SCH40 for the wall thickness a bit too high?
It’s designed a bit too high, which is a bit of a waste. But it has a long service life.
There is no need for the design pressure of the flare pipeline to be 2.0 MPa, as the flare is connected directly to the atmosphere. For the flare tower, a design pressure of 0.4 MPa, with a maximum of 0.8 MPa, is sufficient when using a molecular seal or fluid seal. Given that the flare tower is 80–90 meters tall and has a diameter of nearly 1 meter in large-scale installations, the flare is supported by towers; setting too high a pressure for the flare tower would result in excessive waste of steel. As for the main flare pipe, a design pressure of 0.8 MPa (G) is generally sufficient if steam pressure is taken into account for cleaning purposes. In large-scale installations, the diameter of such pipes reaches 0.8–1 meter, and too high a design pressure would lead to significant waste
What about the vent volume? I’m not sure if the pipeline diameter is sufficient Choosing an SCH20 wall thickness for the pipeline is sufficient
The wall thickness isn’t that thick; I just find it strange that your vent pipe is so small – what’s the discharge volume?