High pressure flange material
High pressure flange material
(OP)
Hello,
I do not have access to B16.5 but I would like a reality check on a slip on flange that would be capable of 550F and 5,250psi. In my table of service ratings for SS not even CL-2500 flanges can get that hot. Any thoughts?
Thank you.
I do not have access to B16.5 but I would like a reality check on a slip on flange that would be capable of 550F and 5,250psi. In my table of service ratings for SS not even CL-2500 flanges can get that hot. Any thoughts?
Thank you.





RE: High pressure flange material
According to B16.5, the appropriate flange for the stated service conditions would be
Group 1.10 (SA 387 Grade 22, Class 2 plate or SA 182 F22 Class 3) 2500 lb Class
@550 deg F, 5290 psi working pressure
interpolation is permitted between 500 and 600 deg F.
At this pressure, I would NOT recommend a slip on flange. You should be using a welding neck flange.
RE: High pressure flange material
In your opinion, can I perform decent "reality checks" of designs BEFORE going to my ASME machine shop with an actual RFQ with the following:
ASME Section VIII/Division 1
ASME B16.5 for flanges
ASME Section II/Part D
I cannot purchase the entire code nor would I want to learn it. I just want enough information to put a decent design together. To give you an idea of what my company does - we put heating elements inside vessels of all shapes and sizes. Frequently we are using a piece of pipe with flanges welded at each end. Therefore, all I would really need to know is the stress values for lots of different materials (Section II/Part D), the service ratings for flanges made from different materials (B16.5) and then obviously the construction of these vessels (VIII/1).
Am I making sense? Could I get away with this level of reference material or would you recommend something else?
Again, thank you so much for your help.
Matt
RE: High pressure flange material
If I understand your post correctly, what I believe you intend to do is to develop a "conceptual design" that would be used as a request for proposal. An ASME certified shop would review your conceptual design, develop final design and fabrication details for your review, fabricate and stamp the vessel.
If the above is your intention, yes this makes sense. You can use the above to narrow down the selection of material choices for the shop. Ultimately, the ASME certified shop is the one that will assume design responsibility and fabricate the item to ASME B&PV Code.
RE: High pressure flange material
RE: High pressure flange material
The concern is safe and long term pressure retaining capability for the 2.5" and 1.25" pipe sizes.
No. It means the wall thickness must be increased for a specific pipe OD or a higher strength pipe material must be used. This is not a growth problem, it has to so with avoiding stress rupture failure in service.
RE: High pressure flange material
RE: High pressure flange material