Flange joint stressed @ shipping...analysis?? 1

[JAYDEE23]

We shipped a pipe section. it consisted of:
-18" 106b sch XH/105 300# Flanged, both ends, pipe spools
-one 300" long and one 150" long and they were bolted together.

At the site it was realized the 150" spool far end was not flat on the truck but rather cantilevered from the flanged joint of the 2 spools. How can i go about proving this joint, pipe, weld, etc.. has not been compromised. It has a Spriral wound CGI gasket at the center joint.

Any ideas are greatly appreciated

 

[rmw]

Were you previously planning to put the spools in service with the gasket in place between the spools?

rmw

 

[JAYDEE23]

yes, I am less concerned about the gasket and more concerned about any compromise to the pipe, weld or flange.

Through observation and common send i can tell you there is nothing wrong with this pipe. Customer is looking for technical explanation to back up that conclusion.

 

[StevenHPerry]

If the spools were shipped by truck across Missouri roads, the potholes encountered along the way may have caused significant fatigue damage.

If they just went down the street and are not intended for an application where fatigue is a concern, here are a few ideas:

1. Check for permanent deformation exceeding fabrication tolerances. If everything is plumb and square, the material never yielded.
2. Leak test.
3. Make some reasonable assumptions about the vertical accelerations experienced during transport, do a quick calculation of a cantilevered beam, and compare results to S_c.

- Steve Perry

http://www.linkedin.com/in/stevenhperry

This post is designed to provide accurate and authoritative information in regard to the subject matter covered. It is offered with the understanding that the author is not engaged in rendering engineering or other professional service. If you need help, get help, and PAY FOR IT.

 

[JAYDEE23]

Customer excepted common sense approach... after working a full day on my technical explanation...Thanks guys!!

 

[BigInch]

Hope the leak test proves it.