AIR COOLER HEADER NOZZLE LOAD CALCS
AIR COOLER HEADER NOZZLE LOAD CALCS
(OP)
I would be interested to hear how others calculate the nozzle loads on a flat header box in accordance with API 661 / ASME VIII - apart from of course using FEA.
Is there a "simple" method for doing this?
Is there a "simple" method for doing this?





RE: AIR COOLER HEADER NOZZLE LOAD CALCS
RE: AIR COOLER HEADER NOZZLE LOAD CALCS
cb4 is right....
A computerized "flexibility analysis" is performed on the piping system design. This would include materials, temperatures pressures layout geomety and support locations. A typical computer program used for this purpose is CAESAR-II by the COADE corp. (go to WWW.COADE.COM fro more information)
One of the results of this analysis are piping reaction loads on the equipment. These loads would be compared to the limits in API-661 to determine if they are acceptable.
If the loads exceed the allowables, the piping stress analyst would suggest a modified piping layout or a new scheme of pipe supports to meet the API Criteria.
Hope that this helps
MJC
RE: AIR COOLER HEADER NOZZLE LOAD CALCS
Thanks for your replies. I am fully aware of the piping design methods
My question is not related to the piping attached to the coolers. We in the mechanical / static equipment department typically ask vendors to design header box nozzles to take 2 or even 3 imes the loads specified in API 661.
My question is how do others calculate the actual nozzle loads - stresses in the rectangular header box plates? eg for vessesl we use WRC 107 / WRC 297 or BS 5500 Appendix G
Is there a simple method without having to resort to FEA?
Don't other members use air coolers or am I posting this in the wrong place?
Thanks again
RE: AIR COOLER HEADER NOZZLE LOAD CALCS
RE: AIR COOLER HEADER NOZZLE LOAD CALCS
prex
http://www.xcalcs.com
Online tools for structural design