What structural type is used for the non-standard manholes on the side of tower-type equipment?
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For some towers with high design pressures for which standard manholes are not available, what structural types can be used for custom-manholes on their sides? What weight limit does a flange cover need to have in order to be suitable for a vertical lifting cover design?
You can use non-standard manholes; for flanges and flange covers, standard components with high pressure ratings should be selected, and forged pipes should be used, with strength calculations required. For a structure like a vertical hinged cover, structural calculations are required; by searching online, one can find the calculation methods for manhole lifting arms.
The specifications of the rotating arm for vertical hatches can be determined based on the weight of different flange covers; the weight of the mounting holes in these devices is much greater than that of ordinary manhole covers