LOCAL STRESS IN SHELL DUE TO FORCE ON NOZZLE
LOCAL STRESS IN SHELL DUE TO FORCE ON NOZZLE
(OP)
I know I can find here experienced enginners who are willing to share their knowledges. My problem is probably futile but I nevere managed to clarify everything in my head on this matter. Let's imagine I have a size 500mm manhole, on top of a horizontal vessel with diameter 2000mm, 10mm thick. On the manhole blind flange I have to put a pump with a weight of 500 kg. I have 0.5 MPa in the vessel. Vessel material... ASTM A516.
How can I evaluate if the shell can handle the weight of the pump ?
I searched the ASME VIII, tried to find WRC 107 & 297, I read some articles, I even got the spreadsheets from http://www.xcalcs.com/ and tried them but I still cannot be sure if I understood well.
Please, can someone take 10 minutes or more of his time and send me some directions ? Please don't imagine I will feel hurt if the explanations are too scholastic or too "stupid proof". I am quite young and living in Romania so I will take the liberty to consider these my excuses.
Thanks and Best regards,
Doru
doru7171@hotpop.com
How can I evaluate if the shell can handle the weight of the pump ?
I searched the ASME VIII, tried to find WRC 107 & 297, I read some articles, I even got the spreadsheets from http://www.xcalcs.com/ and tried them but I still cannot be sure if I understood well.
Please, can someone take 10 minutes or more of his time and send me some directions ? Please don't imagine I will feel hurt if the explanations are too scholastic or too "stupid proof". I am quite young and living in Romania so I will take the liberty to consider these my excuses.
Thanks and Best regards,
Doru
doru7171@hotpop.com





RE: LOCAL STRESS IN SHELL DUE TO FORCE ON NOZZLE
Regards
RE: LOCAL STRESS IN SHELL DUE TO FORCE ON NOZZLE
RE: LOCAL STRESS IN SHELL DUE TO FORCE ON NOZZLE
Humm, FE-PIPE and or Nozzle Pro.
Due a search on Google WRC 107. you will fine some engineering spreed sheet.
Leonard@thill.biz
www.thill.biz
RE: LOCAL STRESS IN SHELL DUE TO FORCE ON NOZZLE
You are puting a crushing load on the vessel and if the vessel is already designed/mfd. you can not use the cover plate/pad to hold a 3/4ton. If you are to design the vessel, you have to provide means to hold the load, whether increasing the t of the shell plates or stiffeners calculated accordinglyl; even the nozzle/pad/coverplate sizing has to be designed to hold the loads.
ER
RE: LOCAL STRESS IN SHELL DUE TO FORCE ON NOZZLE
ER
RE: LOCAL STRESS IN SHELL DUE TO FORCE ON NOZZLE
I searched on google but dind't show up too many things.
RE: LOCAL STRESS IN SHELL DUE TO FORCE ON NOZZLE
Edward L. Klein
Pipe Stress Engineer
Houston, Texas
All opinions expressed here are my own and not my company's.
RE: LOCAL STRESS IN SHELL DUE TO FORCE ON NOZZLE
The reason why I keep trying to understand the algorithms is for me to be able to build my own spreadsheets. As far as my company doesn't invest in software and I am requested for fast results, do you think I have another choice ?
RE: LOCAL STRESS IN SHELL DUE TO FORCE ON NOZZLE
RE: LOCAL STRESS IN SHELL DUE TO FORCE ON NOZZLE
RE: LOCAL STRESS IN SHELL DUE TO FORCE ON NOZZLE
Bednar has a simplified formula for a point load on a vessel
stress in vessel =
1.75*((R*t)^.5)*(P/L)/t^2
for your case;
R= vessel radius = 1000mm (39.37")
t= thickness = 10mm (0.394")
P = point load = 500kg (1,102lbs)
L = Pi*diameter of nozzle = Pi*500=1571 (Pi*19.865 = 61.84)
stress in the vessel due to point load
= 5455 pa (791 psi)
RE: LOCAL STRESS IN SHELL DUE TO FORCE ON NOZZLE
Regards
athomas236
RE: LOCAL STRESS IN SHELL DUE TO FORCE ON NOZZLE
I do not think is a good idea of some one breaking the law in providing any information/copies of any program/software.
Doru: can you stop.
ER
RE: LOCAL STRESS IN SHELL DUE TO FORCE ON NOZZLE
Stop.