Dear Users ,
When I design a low pressurized storage tank ( as per API 650- Appendix F) . I have come across with a differences between 10 th edition , Addendum 4 ( December 5 ) and all others.
According to the 10 th edition , Addendum 4 ( December 5 )
F.5 Required Compression Area at the Roof-to-shell junction.
the total required compression area at the roof-to-shell
junction is the greater of those calculated from the following
equations:
A= (D^2)*(Pi-0,08*th)/(1,1*tan@) @:Roof Degree
A = (D^2)*(0,4*Pi-0,08*th+0,72*((V/120)^2))/(1,1*tan@)
First formula is similar to me. Cause this formula is mostly same in all editions.
But did you realize that, the second formula is only used in 10 th edition , Addendum 4 .
Why this formula is cancelled in latest editions. ?
This formula is reasonable . Cause it takes into consider both internal pressure and uplift wind load. ? Am I wrong. ?
Dear users ,when I calculate compression ring area , which formula should I use ? and why ?
Could you please explain me as quick as possible ? I would be so so appreciate.
Thanks in advance
Best Regards
Caner F.