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  [ TECHNICAL BULLETIN ]

Bellows Expansion Joint: Pressure Loads, Anchors & Guides

Tension & Compression System
Bellows "PA" load
Bellows Effective Thrust Area
Main Anchor Design
Intermediate Anchors, Pipe Guides and Pipe Buckling
Tension Systems
 
Appendix
(a) Bellows Thrust Load
(b) Results of Sample Problems

= Intermediate Anchors, 
Pipe Guides and Pipe Buckling
=

In some cases, a straight line system of axial bellows anchors and guides is not practical or desired; or there is no reasonable way or place to anchor the bellows thrust loads. In such cases self restrained bellows assemblies may be used, such as the double hinge restrained bellows shown below. Thermal expansion (or contraction) in the long pipe is absorbed by an offset deflection of the double hinge assembly.


 

 

Bellows thrust load is carried by hinge bars, gimbals, tie rods or other such devices; hence normal tension is maintained in the pipe system and main anchors and full lateral restraint guides are unnecessary. See Reference1 for more information.

Reference2: W. Flügge, "Stresses in Shells", p 434-436, Springer-Verlag, Berlin/Göttingen/Heidelberg, 1962

   
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