High Temperature Allowable Stresses for Bellows
High Temperature Allowable Stresses for Bellows
(OP)
I am attempting to design a 16" bellows expansion joint for a 2000F application @ 80 psig. At this temperature, it is enormously difficult to select an appropriate bellows material. Even if I am able to do this, at 2000F any material I select would be in the creep range. Should I decide that I DO NOT want to refractory line my EJ, what material would be most suitable (...the media is hot gas exhaust from a aircraft engine)? How could I determine an appropriate allowable stress based on the 2000F temperature? Does the fact that the bellows operates in the plastic range affect how I would select an appropriate allowable stress? Please note that this project is ASME B31.3. I am aware that the code genrerally does not recognize temperatures this high, but, assuming ASME did, how would I approach determining the allowable stress?





RE: High Temperature Allowable Stresses for Bellows
One thing that you may have to concede to for your application is a planned replacement life cycle for a joint in this type of service.
Edward L. Klein
Pipe Stress Engineer
Houston, Texas
All opinions expressed here are my own and not my company's.
RE: High Temperature Allowable Stresses for Bellows