Hi all,
I am working on pipe stress analysis for offshore platforms and FPSO projects.
In onshore, the pipe supports (L post / T post) are directly welded to structure. But in offshore the support specification strictly asks to weld a base plate above deck plate and then weld support steel on this base plate. It is only when we take support above platform decks.
For supports taken below platform deck (i.e, inverted L post or inverted T post and Goal post types), it is directly welded below structural beam.
I don’t understand this requirement. One thing I know is if we cut deck plate and weld support stanchion over the structure, the water accumulation in the cut is possible and thus corrosion. But in this case we can weld the stanchion over deck plate without cutting it. so, why we need an additional base plate above deck plate?
Please give your views if anyone has worked on these sort of support detailing.
thanks in advance.
-shankar.
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