Transition rings
Transition rings
(OP)
Maybe somebody knows if fabrication of oval transition rings are supported by any API, ASME, ASTM, DIN Standards?
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RE: Transition rings
Cheers,
gr2vessels
RE: Transition rings
RE: Transition rings
If so these are available as either "Oval" or "Octagonal". Either should be manufactured to the requirements of ASME B16.20.
If you are talking about a ring which can be used to connect two different sizes of flanges with the same pitch circle diameter but different ring groove diameters (see link below) then there is no industry standard that I am aware of that addresses these items. I've never seen a need for such an item and don't think I would use one. If I absolutely had to mate two different systems (ignoring the associated implications of different pressure ratings), I would build a short piping spool to get from one to the other (different flange on each end).
http://www.danloc.com/Special.htm
RE: Transition rings
http://
RE: Transition rings
http://www.wiremasters.com/
RE: Transition rings
http
The Danloc page I linked to originally also says that the Danloc transition rings are not in accordance with API.
RE: Transition rings
Why this is not in accordance with API?
RE: Transition rings
Unfortunately, there is much more to the design of a flanged joint than ensuring that the gasket fits in the groove.
In theory, if you want to use a transition ring, you would need to do the flanged joint design yourself to ensure the stresses in the flanges / bolting where acceptable (using something like Appendix 2) and then you would need to have the gasket design confirmed to ensure it was acceptable (something like FEA). However, not sure that even with that the configuration would be acceptable to your design code or regulatory authority?