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Thanks so much for the help! I sent an RFI, i'll reply to this when i hear back!

Thanks for replying! That seems reasonable. I wish they would use the same terms.... Does anyone know how to find out for sure?

Hi all, I was trying to find out what exactly this item is on the API STD 653 Annex C Tank Out-of-service Inspection Checklist. "C.2.7.2 Staging Support Connection Inspect the condition of the staging support for corrosion." It is listed under C.2.7 Fixed Roof Appurtenances.

Hi All! Does anyone have any good resources on Tank Bottom Settlement Surveys such as books, articles, etc. relating to the methodology? API 653 Annex B lays out the requirements and formulas, and there are numerous articles on the theory behind the concepts, but I am looking to gain more...

Hi Rputvin! ok, so they're simply saying this head is a flat plate with X & X dimension, and i was reading too far into it. Thanks! unfortunately there are no drawings for this equipment other than an inspection iso showing where cmls are to be taken, but no dimensions.

Hi Rputvin! Thanks for replying! Yes i agree, "diameter" is decieving in this case, as this is a rectangular header box as well. The dimensions of this header box are 3.75" depth x 7.75" tall x 88.625" length. But on the U1, it gives 9" as the "flat diameter" and 88.625" length. Yours is the...

Hi EdStainless! Thanks for replying! Could you be more specific? This is out of my wheelhouse and i need more direction. I looked up HTRI and it seems that's Heat Transfer Research, Inc and they have modeling software? Most of the equipment i analyze is built way before modeling software, for...

Hi y'all, I'm an Inspector in Oil & Gas and i specialize in RBI on refinery equipment. For inventory calcs i have to put in the dimensions of equipment and i've noticed on U1s for air cooled heat exchangers (finfans), under the dimensions for the header boxes there is "Flat Diameter" & length. I...