Aluminum Flange Rating
Aluminum Flange Rating
(OP)
We are evaluating a liquid nitrogen system that has 2" through 12" aluminum flanges. What is a source for pressure/temperature ratings for 6061 T6 aluminum flanges? There's nothing in ASME B16.5 for aluminum.
Larry





RE: Aluminum Flange Rating
I'd be really leery of using Al alloys for a pipe flange. Differential thermal contraction of the Al relative to steel botls may lead to loose bolts, and loss of seal.
RE: Aluminum Flange Rating
The pressure ratings for aluminum flanges are provided in ASME B31.3, Appendix L. They are provided in ASME B31.3 because ASME B16.5 does not cover them.
RE: Aluminum Flange Rating
Thanks loads! It's amazing how you can work with Codes for years, and still find a surprising nugget or two.
Larry