Nozzles location 2

[Technopriest]

Is it possible to place on a formed head outside 0,8*De?
Is there any particular limitation?
Vessel is to be code-stamped as per Section VIII, Division 1..

If it is not possible, in which paragraph of the code is the limitation present? I can't find it, even if my chiefs believe the limitation do exist..

Any help will be greatly appreciated!


Che Dio ce la mandi buona, o almeno ce la mandi- Massimiliano Eusebi

 

[waskillywabbit]

If the nozzle is outside of the spherical portion of the elliptical or torispherical head use the standard internal pressure equation from UG-27 instead of the equation from UG-37.

In the case where a nozzle is within the 80 % diameter limit then, the required thickness of the head is equal to that of a seamless sphere of radius K1*D, where D is the shell diameter and K1 is given by Table UG-37.

I hope that helps.

Brian

 

[codeeng]

Brian is correct, you can put the nozzle anywhere. If the nozzle and its reinforcement stay within 0.8D you get additional relaxation.

 

[Technopriest]

Thanks to both

Che Dio ce la mandi buona, o almeno ce la mandi- Massimiliano Eusebi

 

[MJCronin]

Techno....

Have you seen this thread ??

http://www.eng-tips.com/viewthread.cfm?qid=67661

Let us know your final thoughts on this matter

"Do be do be doooooo.... da da da dee da......"

Frank Sinatra (another famous Italian)

MJC

 

[Technopriest]

Many thanks MJCronin. I read the thread and I learned a lot about ASME code.
I must admit I have a lot of problems on ASME code; both because I'm a young engineer and because I am italian (and we use VSR code, which is far more rigid). I believe ASME Code is really not user friendly; there are too many exceptions to the rules presented, and these exceptions are written in the most disparate places.
But I believe, as was stated in the thread, "Gray hairs will come quickly". Doesn't matter if a thing is easy or not; with time, anything can be learned (hey, I managed to get a degree after all!)
Thanks for the chance to have an insight of ASME world


Che Dio ce la mandi buona, o almeno ce la mandi- Massimiliano Eusebi
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