Is it not possible to return to cultivation this way?
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For a certain tower equipment, after heat treatment it was found that the ellipticity exceeded the allowable limits; it is planned to use jacks to round out the cylinder and local heating to achieve a circular shape, followed by further heat treatment for repair? Is such repair feasible?
The internal components of tower equipment, such as the internal support rings and liquid drop plates, are complex; if straightening is achieved using jacks for support combined with flame heating, a very large lifting force is required, which will inevitably have an adverse effect on the material of the cylinder. It is recommended that if the roundness deviation is not significant, no action should be taken; if the deviation is unacceptable, the tube section should be replaced.
Thank you. It is planned to use multiple jacks; between each jack and the cylinder, there will be arc-shaped shims that match the shape of the inner wall of the cylinder, thereby ensuring a sufficient contact area. Will this help prevent damage to the cylinder material?
It exceeds the limit by a lot; the standard requires it to be no more than 1%, but it’s already at 4%. It’s likely that the internal components have been affected as well
It might be a problem with the heat treatment support settings; such a large deviation makes it very difficult to carry out repairs. If one doesn’t want to replace the tube sections and still wants to fix the issue, it is recommended to remove the internal components first and then reshape them, but that too is likely to be quite troublesome.
The self-weight of the tower must be taken into consideration, as well as any potential effects that this self-weight may have during heat treatment
It sounds simple, but the actual implementation must be quite difficult: what should the tower diameter and wall thickness be? The heat treatment plan should be reasonable: internal component installation plan, equipment support plan, time and temperature control, etc.
The inner diameter is about 5000 mm, and the wall thickness is about 60 mm – those are the approximate values