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I have a client who has ordered 3/16" THK 304L for their bottom course and now requires a thicker course instead. The tank is not yet built but material has been ordered. I thought I have seen an API 650 tank in the past using overlaid sheets to gain more thickness although perhaps my memory is...

I am looking into forming a compression ring as part of the top shell plates. From what I can tell, this was covered in API 650 10th edition, addendum 4, Figure 3-3A (pg 3-3) labeled as ALTERNATIVE ROOF-TO-SHELL JOINT; however, I have not been able to locate this in the current edition. Does...

Does anyone have information about welding stainless steel shell plates to plain carbon shell plates? Our client would prefer to lap weld along the horizontal seams. Is this permitted per API 620? Thanks.

I believe this should be a straightforward calculation but it has been a long time since I've done this stuff and am having trouble wrapping my head around it. I have one tank at equilibrium that is partially filled with 240C water at 33 bar (state 1). A valve is opened to a second equivalent...

Thanks for your guidance, great responses. That cleared everything up. With respect to the flange, the maximum temperature gradient across it in all directions is so minimal anyways (~20C) that it is no longer a concern.

1) Thanks, this makes more sense to me. Over a length that crosses a step in ID, do we take the larger or smaller of the two radii or average? 2) The flat plate is a bolt flange at the end of the drum. It is heated from the inside of the drum. So as I understand that definition, the heated...

I am trying to get clarification on considering the thermal gradient between adjacent points using the fatigue analysis screen Method A of ASME SECT VIII DIV 2 Section 5.5.2.3. I understand in general how to calculate the temperature difference but I am unclear in a certain number of situations...