Does this count as an expansion joint?
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Dear teachers and friends, in the field of pressure vessel manufacturing, does this count as a metal expansion joint? We have adopted \"GB/T 12777-2008 General Technical Requirements for Metal Bellows Expansion Joints\" as the design standard. However, since this standard does not specify an exact identical structure, I am somewhat unsure whether it can be considered a standard component. I would also appreciate everyone’s opinions on whether this standard should indeed be used. The elementary school students thank you here.
The image is only a structural diagram; when selecting an expansion joint, it is necessary to take into account conditions such as operating conditions, medium, and pressure.