1) An expansion joint rating is how much pressure it will withstand at a specified temperature and for what displacements (axial/lateral/angular).
2) I would suggest that you do not get into expansion joint design as there are a lot of standard designs already. Just aid in their selection/use/installation - let the supplier/manufacturer do the actual design for your specified conditions.
3) If you really want the EJMA standards then I would suggest ordering it from their website. I have a copy, and I would probably be willing to post/offer specific excerpts/pages from the standard, however, I will not post the entire book.
4) Worldwide there are many different manufacturers of expansion joints to the EJMA standard. I would suggest contacting your local piping/valving/fitting supplier to see it they can offer assistance/service. If not, I would suggest using the ever faithful Google.
We manufacture joints to EJMA. I agree with the last poster that you should leave it to the manufacturer, as the calculation is quite involved, and you have to choose parameters like materials and thicknesses that may not be available to manufactureres.
Your main concern is pressure, temp, and movements on the bellows.
expansion joint rating
Re: expansion joint rating
