Design of Elliptical Flat Plate 1

[FabianoRibeiro]

Dear all,

In the case of an elliptical manway like the one shown in the attached picture, how should I calculate the required thickness of the elliptical cover?

In some catalogs the thickness specified by the manufacturer seems too small. For example: a 12x16 manway specified to 700psi @ 650F has a 3/8" thick cover.

Best regards,

 

[gr2vessels]

For the design of flat eliptical covers, refer to UG-34(c)(3). However, the cover you presented in the attachment is a dished type, which I believe belongs to the quick opening closures as per UG-35.2. Please note that the majority of the quick opening closures are proprietary designs and not necessarily calculated using ASME formulas. I hope this helps.
Cheers,
gr2vessels

 

[chicopee]

Figure out the thickness of a flat elliptical cover per section refered by gr2vessels and compare the result with the types you presented and see if it makes sense. tcommercially ave