I’m truly worried it’s a time bomb
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For high-temperature steam pipelines, are there more advantages or fewer advantages to flange connections? ! Pipe A inlet: 20” x 8” - 300#; Pipe B inlet: 24” - 300#; Pipe C outlet: 20” - 150#. There is a release through a safety valve. The distance between A and B is approximately 12 meters, while the distance between B and C is about 22 meters. The distance between A and C is also around 22 meters in either direction. Pipe temperature: 425 DEG C, pressure: 1 MPa. Pipe material: A106 GR.B; fitting material: A234 WPB. Does anyone know if this is safe?
This post was last edited by jinqhuaxz on 2017-1-11 at 13:56. Attachment: The wall thickness of the pipes is generally SCH.40
From a maintenance perspective, of course, the fewer connection flanges, the better. Because this way there are fewer sealing points, and thus fewer leakage points. By the way: What software was used to create the images on floor 2 by the original poster?
The 300-pound flange grade is no problem; I wonder if the pipeline in question has undergone stress analysis? If the stress analysis is fine, then there’s no problem.
The pressure at 1MP is 425°C – that’s an extremely high degree of supersaturation. The pressure resistance of the selected pipeline should be sufficient; what’s important is to consider its ability to withstand high temperatures. Please refer to the \"Regulations on Safety Inspection of Pressure Pipelines\"
Isn’t this pipe, with its winding shape, vulnerable to erosion and water hammer in the future?
There are quite a few turning points. There are also quite a few flanges, so it should not be a big problem; the key issue is the low pressure.
Without doing the calculations, no one can tell whether it’s safe or not. You only have information about the pipeline’s route; without details on the support structures, it’s impossible to determine anything. Even if the stress on the pipeline itself is within acceptable limits, that doesn’t necessarily mean it can be used. I see that there are 3 more connections – I’m not sure what they’re connected to; they’re probably connected to some equipment. If so, you still need to check whether the interfaces of those devices can handle the resulting stresses.