UB-16(b) Interpretation 1

[TJOrlowski]

Colleagues:

A hypothetical question:

Construction Code ASME Section VIII, Division I, latest edition/addenda. A TEMA type BEM shell & tube, with single course construction of the shell. Shell size 6" IPS, out of SB-619 UNS N10276 Alloy C276 pipe. Design MAWP 75 PSIG + FV @ 325F, with a .0625" inside corrosion allowance. No RT.

What is the minimum required wall thickness (in decimals, not wall schedule) of the shell? How did you arrive at your answer? I have an engineer that I believe is mixing and matching code sections in a design he's submitted for quotation.

-TJ Orlowski

 

[Duwe6]

Code interpretation VIII-1-86-11 is pretty clear. Nominal minus 12½%

*however*, I cannot understand the Committee's rational for disregarding "Actual" measured thickness. "Actual" is real. Why would any design want to ignore reality ?!!?

 

[SnTMan]

Back OT, I (respectfully, of course) disagree w/ jamesl and note the cited Interp is not related to UG-16(b).

Regards,

Mike