2 replies to this topic

[KeJoSa2010]

I am lookinf for someone with experience with the method of sizing PSV's presented in Richard Doane's article entitled "Designing for Pressure Safety Valves in Supercritical Service"  in Hydrocarbon Processing (January of 2010). I have used the API 521 method to size a PSV for fire case under supercritical conditions and the PSV is much larger than what is predicted in Richards article (just like he mentions it would be). I am hoping I can get some guidance as to the validity of this approach. How can I validate the results?

 

Also, I see that there are some minor errors in the article which are easy to track and correct. Does anyone know of any updates to this article outlining these corrections (I can point them out if required)? I will also contact Hydrocarbon Processing and see if they have the corrections.

 

Thanks

[Bobby Strain]

You might have a look at this. I don't think I have ever read it. And there may be errors.

 

Bobby

 18. Rigorously Size Relief Valves for Supercritical Fluid.pdf   82.91KB   72 downloads

[serra]

this topic has been discussed in the past,

values calculated by API formula (based on integration of ideal gas) have been compared with rigorous and semirigorous methods,

see the post 21 in thread

 

"http://www.cheresour...g-temperature/"

 

which includes a Excel page  to compare values calculated by API formula Vs. Hydrocarbon Processing Method Vs. rigorous methods available in Prode Properties,

the method proposed in Hydrocarbon Processing magazine is very simple

(i.e. avoid double corrections for gas non ideality) and results are interesting,

the limits depending from adopted procedure (i.e. integration).

For critical cases better to compare results against rigorous methods

as those mentioned in the thread.