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saddle design for ASME sec 8 audit

saddle design for ASME sec 8 audit

saddle design for ASME sec 8 audit

(OP)
can you please tell me a suitable way for designing the saddles i am going crazy please i beg you

RE: saddle design for ASME sec 8 audit

mechbadem, the saddle ltself is usually just treated as a beam subject to external loading. Longitudinal due to wind, seismic, bundle pull, etc. Vertical due to seismic, dead weigtht, etc. Find the moment of intertial of the built up section, s = MC / I.

Influence of saddle loads on the shell may be done by a Zick-type analysis.

Recommend you get a standard handbook such as Moss, Bednar, etc.

Regards,

Mike

RE: saddle design for ASME sec 8 audit

The basis of a lot of this design is a paper by Zick from ages ago:
https://www.codeware.com/support/papers/zick.pdf
The different handbooks expand on and explain this some. Typically handled in software analysis, but you have to understand what it's doing to make it work right.

RE: saddle design for ASME sec 8 audit

You can refer Zick's method for calculating the effect of saddle support on vessel
Main stresses are Longitudinal bending, Circumferential and tangential shear. Longitudinal stress should be added with stress in longitudinal direction (girth seam) to get total stress in compression.

Regards
Jithin

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