Local Load due to Piping on a Flat Plate

[tired]

Is there any guidance for calculating local stresses on a blind flange due to piping loads.
WRC107 / 297 cover cylindrical and spherical shells but what about flat covers etc and fin fan headers.
Is there any guidance in asme viii or asme b31.3?

 

[ColonelSanders83]

Design it as a specielty flange in accordance with the BPVC Section 8 Div. 2 Appendix 2. These design rules allow for extenal loadings.

A question properly stated is a problem half solved.

Always remember, free advice is worth exactly what you pay for it!

http://www.ap-dynamics.ab.ca/

 

[TGS4]

Interesting advice, ColonelSanders83. How does VIII-1, App.2 allow for external loadings?

 

[tired]

I don't think it will qualify as a special flange because it is basically a 3" nozzle welded directly on to a 24" blind flange. The opening is relatively small compared to the blind diameter.
How would I assess the loads applied to this branch at the nozzle / blind junction?
Thanks in advance.

 

[ColonelSanders83]

TGS4,

My bad, I actually meant to referance the equivelant design procedures from VIII-2 which does handle external loadings. My mistake.

Tired, there is no stated size limitations in the rules for speciel flanges. If you are very concerned with applicability compare the stresses you get with some calculations useing Roark's formulas for stress and strain. I have done this in the past and have had no trouble sleeping at night.

Just my two cents worth.

A question properly stated is a problem half solved.

Always remember, free advice is worth exactly what you pay for it!

http://www.ap-dynamics.ab.ca/

 

[jamesl]

You can use nozzle FEA softwares such as Nozzle Pro. It is included in Compress.