Calculation for reinforcing embedded forged pipes
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High-pressure vessels use an integral forged embedded reinforcement structure (with the reinforcement tubes welded to the vessel body or head). I would like to ask the experts how to calculate the reinforcement for this type of structure.
This reinforcement structure seems to use analytical design!
Reached this level! The design and manufacturing units are already outstanding!
Calculate the reinforcement as for a normal inserted fitting
Normally, we also calculate based on the inserted pipe, but I always feel that this calculation method isn’t very accurate; in my opinion, it’s rather conservative. Is there any more practical calculation method available now?
I’ve also seen calculation reports from several large design institutes before; it seems they use this same method for calculations.
It can be calculated based on the plug-in fitting. If you prefer a more conservative approach, you can use the calculation method specified in GB/T150 to compute the area in segments; this requires writing code yourself.
The integral forging embedded reinforcement structure can be calculated as an inserted nozzle, with the cylinder material being entered as a forging.
I think it’s fine to enter the cylinder material as per its actual properties; using the value for forged materials doesn’t seem appropriate. Generally, the dimensions of the joint area are not much larger than the outer diameter of the reinforcement tube. The calculated reinforcement width B will definitely be greater than the diameter of the pipe joint area. Within this reinforcement width B, most of the material should still be from the shell itself. If the cylinder material is entered as forged material, then the reinforcement width B should be set to the outer diameter of the reinforcement tube joint area – which would be too conservative an approach.