Pipe Saddle for high temp application

[sbnz]

We are involved in designing a high temperature (500ºC) steam piping inside a power station. The pipe material selected is ASTM A335 P91 and the slippers (shoes/ saddles) of A387 Gr22.

Can somebody, having experience of designing piping for such temperature application recommend the correct/ proven type of slipper design?

Would it be ok to use standard welded design of slippers with the pipe? The concern is the differential thermal expansions between pipe and slipper - is a notch between either ends of the welded slipper design helpful?)

cheers,

 

[LSThill]

Technical Note:
There is a posting previous of a slimmer problem and detail solution by

PREX

http://www.xcalcs.com

Advance Search (Heat Transfer & Thermodynamics engineering)

Reference Mechancial Design of Process System, by A. Keith Escoe. Gulf Publishing Company

I do not have my reference book with me on current assingment in Japan

 

[JohnBreen]

Hello sbnz,

You should get a copy of Pipe Fabrication Institute (PFI) Bulletin ES-26. PFI ES-26 is referenced by ASME B31.1. This document addresses the manner and details of welding the support appurtenance to the pipe wall.

Regards, John.

 

[stanier]

Perhaps you should consider a roller rather than a slipper?

Geoffrey D Stone FIMechE C.Eng;FIEust CP Eng

http://www.waterhammer.bigblog.com.au

 

[imok2]

I was thinking more in terms of a line tap