ASME VIII Div 1 UG-34

[Graybags]

Hi all,

Referring to sketch j in fig UG-34, the calculated flange thickness 't' is shown from the gasket contact face to the back of the cover,however,the thickness of the flange where the bolt holes pass through appears thinner. I have calculated 't' using formula 2 for both operating conditions and gasket seating and have a min result of 1.5in. Does this figure apply to the thinnest part of the flange?

I have a copy of another company's calculation which indicates that 't', where bolts pass through, conforms to the formula on page 35 - when cover plate is grooved for a peripheral gasket.

Bit confused! Any help would be greatly appreciated.

Thanks in advance.

Graybags

 

[prex]

As a flat cover has its maximum stress at center, thickness t of the cover is as represented in fig.UG-34(j).
And the other company's calculation appears to me correct: the formula for fig.UG-34(k) may also be used to check the thickness of the outer rim of the cover.

prex

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