Pad Flange/Studding Outlet out of Plate?

[HPM3]

Hello,
I’m trying to find info in Section VIII regarding material selection for a pad flange/studding outlet that will weld into a tank head or shell wall. I’m specifically trying to determine if ID/OD plate (not plate rolled into a ring & welded) can be for this type of flange. This is a no-hub flange, similar in design and attachment to the flanges shown in Figs UG-40 (a-1) & (a-2). Material selection and calculation requirements are clear for nozzles and hubbed App 2 or App Y flanges, but not this style. Thoughts?

Thanks,

HPM

 

[gr2vessels]

The studding outlet is regulated by ASME B16.5.
Materials are regulated by Table 1A of ASME B16.5.
Plate materials are regulated by Note (b) of Table 1A, ASME B16.5.
Cheers,
gr2vessels

 

[HPM3]

gr2vessels,

Thank you for the reply. Although, I am not finding where a studding outlet or tank-style pad flange is addressed in B16.5. If it were, I agree that Note (b) of Table 1A would clearly answer my question. This being a tank fitting (albeit one mating to a pipe fitting), the answer should be addressed somewhere in Section VIII...I just haven't found it.

Thanks,

HPM

 

[gr2vessels]

Hi HPM3,
Pressure vessels are regulated by ASME BPVC and tanks by API 620/650 or similar. Tank fittings you call are not addressed in ASME BPVC, that's the reason you couldn't find them. However, the plate / pad / flange you mention are not allowed in ASME BPVC.
Cheers,
gr2vessels