Regarding leaks caused by discontinuities in the external insulation collar of the container
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Recently, I read a paper stating that the external insulation collar of a fatigue-resistant container was not welded continuously, which led to local structural discontinuities, high local stresses, and cracking. I asked relevant professionals, and they confirmed that this is indeed the case – the internal stress caused by discontinuities in the outer layer can reach up to 6 times that of normal conditions. I checked relevant books but didn’t find any discussions on this topic. Moreover, don’t we cut the external insulation rings for towers into 4 pieces to assemble them? It’s not required to weld continuously throughout. Therefore, I would like to ask the experts here: 1: Is it necessary for the external insulation retainer to be continuous? Will discontinuities cause excessive stress and lead to cracking? 2: If it really splits, how is the 6-fold stress calculated? , formula. Thank you! I hope you will kindly share your insights!
Fatigue-resistant container structures should feature continuity and smooth transitions.
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This post was last edited by wanlirn on 2020-9-25 at 11:45. Articles like these are meant for using in order to obtain professional titles; just take a look at them. The term \"insulation retaining ring\" was written as \"insulation removing ring\" – mistakes like these show the poor quality of this article. In the case of broken welds, it’s not acceptable to weld one side continuously while the other side is not; this clearly does not meet the standard requirements. Additionally, I think it’s a problem related to the welding technique itself; originally there might have been cracks in the weld, and over time those cracks spread to the surface of the shell. It has nothing to do with whether the welds are continuous or not
Fatigued components are not allowed to have any attachments welded to their main body after heat treatment (including mechanical damage).
What is discussed here are cracks caused by weld defects in some attachment welds
For fatigue-resistant vessels, it is necessary to avoid weld discontinuities; such a situation does not occur in ordinary towers.