During the erection of a deethanizer column at Yanbu gas plant expansion project, a mismatch between the anchor bolts and the skirt upper base plate holes was observed.
In order to complete the erection process, the column vendor widened and slotted nine holes in the skirt base plate and totally removed three anchor bolts. Additionally, several anchor bolts were damaged and several others were subjected to excessive heat during flame cutting. This raised concern about the safety of the newly developed structure.
Saudi ARAMCO tasked Applied Science International (ASI) to use its in-house structural analysis software Extreme Loading® for Structures (ELS) to provide comparative structural modeling and analysis of the deethanizer column skirt.
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