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Hello To All, I am writing this to gauge other experienced engineers thoughts on floating roofs for storage tanks. We have a client that has several tanks that are in use storing heavy pipeline fluids and light distillates. From what I am hearing there have been a few times where there has...

One more quick verification: If no repairs or alterations are done to the vessel but only inspections and calculations are made, an 'R' stamp is still required correct?

Sweet! Thanks for the info gentlemen.

So in other words, perform the actions to re rate it being as thorough as possible but it won't be able to have the code stamp correct?

So for the state of Texas (Houston area) I should maybe contact HSB (Hartford Steam Boiler) and speak with someone about this issue?

We have a client that has a vessel that is not code stamped and has been in service for some years. They are switching the service on the vessel and now want it to be stamped. Is this allowed considering all documentation and calculations will be provided?

Wow I completely missed it. I'm looking at the figure now. 'Preciate the info!

Please excuse the stupid question...but what is the difference between regular type and low type openings?

Prelim analysis looks good so far using two saddles with 100' span between the saddles and 30' to shell seam. OD is 36"....1" thick API 5L X70M PSL2 pipe. Design pressure and temp is 1000 psig and 300 deg F respectively. This is an inlet slug catcher.

Hello all, I have a horizontal vessel (1" thick API 5L X70 PSL2 pipe)that we will not be stamping with ASME. Seam to seam length is 160'. Question is is it practical to use three saddles on this vessel or keep it to two and beef them up. As of now I have two with a distance of 20' to the...

I have a vertical vessel in which I am attaching top ear lugs with a brace plate. I get a message that states "A top head of type hemi, ell., or f&d is required for attachment of a brace plate....". Any reason why the brace plate can't be attached to the pipe cap? Any help or information is...

I have a boot (12.75"OD x 2'-6"L) attached to the shell at 180 degress (horizontal vessel) and I need to attached a 2" nozzle and 3/4" couplings to this boot. Any help is greatly appreciated

Thanks for the information. I just specified 516-70N for the legs. Again thanks for the help everyone.

I agree SA 36 is mainly for structural purposes as on the other CS vessels I have on my desk now I have used 36 for the legs but this is the first with a -50 MDMT. But would I still take into consideration that a worst case scenario that the vessel actually reaches that cold temperature...

Have a vessel that is in cold service. Using SA 333-6 for shell. Minimum design temp is -50F. Since legs aren't pressure containing wondering if SA-36 is still an option for leg material. Please advise.

Thanks for the help everyone. Much appreciated.

So basically once the vessel is complete (fabrication, all inspections, pwht, final hydrostatic testing, U-reports signed off) then the R-stamp comes into play.

yes i think we are all set regarding the PWHT. the welds are less that 1/2" which is exempt according to the notes of table UCS-56.

okay so let me be sure I understand. we can perform the clip attachments with no PWHT but will have to get the R-stamp correct?

the vessel has just finished fabrication and has gone through a postweld heat treatment. the clips will be welded on in the field before plant start up.