Rigid attachment or nozzle? WRC 107

[ElCidCampeador]

Hello,

acc. to WRC 107, when does a nozzle could be considered as "Rigid Attachment"? Maybe when integral reinforced?

In other words, what is the difference between "solid" and "hollow" attachment?

Thank you

 

[JGard1985]

Hollow is pipe (nozzle), has thru wall of pressure vessel. Solid attachment is like a lifting lug

Jeff
Pipe Stress Analysis
Finite Element Analysis

http://www.xceed-eng.com

 

[MJCronin]

Just a comment ....

I hope that you are aware that WRC 107 is ancient history and has been both superseded and supplemented by other WRC Bulletins

MJCronin
Sr. Process Engineer

 

[DriveMeNuts]

WRC 537 is the updated version of WRC 107. It essentially turns all of the WRC 107 graphs into polynomial equations.
For attachments to a sphere, there are separate graphs for a solid or hollow attachment.
For attachments to a cylinder, there are only graphs for a solid attachment.
WRC 107/537 does not cover hollow attachments in cylinders (i.e. nozzles).

You need to use judgement/experience to decide if a nozzle in a cylinder is rigid and reinforced enough to be considered a solid attachment. Otherwise use another method such as WRC 297, EN 13445-3 section 16 or FEM.