There is this tall upside down shaped U pipe near a sugar refinery on Maui and I can't figure out what it's for ? I've also see these in other industrial areas near salt flats.
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Possible duplicate of [What is the purpose of these diversions in a natural gas line?](https://engineering.stackexchange.com/questions/569/what-is-the-purpose-of-these-diversions-in-a-natural-gas-line/577#577) – Fred Jul 04 '19 at 04:20
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2Some are designed to absorb expansion or contraction of the pipe as it changes temperature. – Solar Mike Jul 04 '19 at 05:12
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@SolarMike But those tend to be only a few feet diversion. This is too narrow and tall for it to be that IMO. – ratchet freak Jul 04 '19 at 13:56
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Yes, I think expansion joints like this are often shorter in relation to the total length in a given direction. I wonder of this is a pneumatic conveying line. I cannot think of a reason for this configuration. I wonder if it is to increase residence time for a conveying operation, maybe to remove moisture? This is just a guess. – Ohio ChemE Jul 04 '19 at 14:13