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Hi, Does anyone know how do I calculate the frequency of a valve to be fitted into a pipeline, when I have no idea about the supports spacing in the pipe. Also, I have been given nozzle loads and am asked to qualify the valves based on those nozzle loads and combined with gravity and seismic...

Bagman2524 Could you please explain the basis of your calculations, ...also were they vertical or lateral acceleration ?

Hi All, Does anybody know (or suggest a reference)what the 'g' loads normally are during transportation on road. We are have problems while transporting our unit and therefore would like to analyze the structure per those 'g' loads. Thanks Nandviks

Hi All, Does anybody know (or suggest a reference)what the 'g' loads normally are during transportation on road. We are have problems while transporting our unit and therefore would like to analyze the structure per those 'g' loads. Thanks Nandviks

I wish I could ....but we don't have non linear license....and the only option available to me is to perform a linear analysis. Given this constraint...could you plz explain why the local bending stress can be treated as secondary at nozzle/shell intersection(per ASME), while at support/shell...

I fully agree with you when you say that piping loads due to thermal expansion of pipe should be considered as primary. That's what I am doing too. But what I am currently calculating is Stresses near the intersection by using WRC-107. Now, per ASME Sec VIII Div. 2, Table 5.6, under, Vessel...

I am trying to understand, why the local bending stress can be treated as secondary at nozzle/shell intersection, while at support/shell interface they have to be treated as primary. NandViks

Just a clarification : It is not the same as Nozzle/Shell interface since there is no opening at support/shell joint.

I am working on a small vessel which is basically supported (cantilevered) using (1) 4" Sc 40 pipe support . I want to calculate the stresses near the support/shell interface. Do you know of any method which could be used to calculate the stresses near the interface and on the shell ? Is...

Hi, I have question regarding calculation of localized stresses. There is a 80 lbf heater connected to a mounting bracket using 1 bolt (the bolt won't be in bending since there will be surface to surface contact between bracket and heater). The mounting bracket is basically a tapered C...