WNRF Flange Design for 1660 mm ID with Design Pressure 130 bar
WNRF Flange Design for 1660 mm ID with Design Pressure 130 bar
(OP)
I am struggling to design the flange with 130 barg pressure. MOC is SA 182 F51. Bolt material is SA 320 L7M. Gasket material SDS SPW. Design code is ASME VIII div 2
If I provide sufficient number bolts, bolt spacing is less than recommended. I tried with various bolt sizes ranging from 1 " to 4" and I could not accommodate the same. I attach the Pv elite files of the same.
Can any suggest a way out of this.
If I provide sufficient number bolts, bolt spacing is less than recommended. I tried with various bolt sizes ranging from 1 " to 4" and I could not accommodate the same. I attach the Pv elite files of the same.
Can any suggest a way out of this.





RE: WNRF Flange Design for 1660 mm ID with Design Pressure 130 bar
RE: WNRF Flange Design for 1660 mm ID with Design Pressure 130 bar
Regards,
Mike
RE: WNRF Flange Design for 1660 mm ID with Design Pressure 130 bar
RE: WNRF Flange Design for 1660 mm ID with Design Pressure 130 bar
What service? (What fluid?)
RE: WNRF Flange Design for 1660 mm ID with Design Pressure 130 bar
Thank you for comments. I attach the files in pdf and word. I have chosen 88.9 mm bolt diameter and circumferential spacing is 146.25 where as minimum is 180.97 mm.
RE: WNRF Flange Design for 1660 mm ID with Design Pressure 130 bar
RE: WNRF Flange Design for 1660 mm ID with Design Pressure 130 bar
Why a 88.9 (rather than a 90 mm ??) bolt? That over 3-1/2 inch diameter.
RE: WNRF Flange Design for 1660 mm ID with Design Pressure 130 bar
What kind of process requires this kind of large components at such a high pressure ?
RE: WNRF Flange Design for 1660 mm ID with Design Pressure 130 bar
i don't see any standard flanges that large using bolts larger than 50 mm.
RE: WNRF Flange Design for 1660 mm ID with Design Pressure 130 bar
RE: WNRF Flange Design for 1660 mm ID with Design Pressure 130 bar
You will get help, but lay out what it is your head clearly, with some diagrams and notes and what your key issues / problems are, with refeerences to codes or design issues.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: WNRF Flange Design for 1660 mm ID with Design Pressure 130 bar
No gaurantee this can be made to work but: When your bolts are spaced too closley together, and assuming you can't raise the allowables, that means you need to use larger bolts. This in turn drives up the bolt circle, and maybe the mean gasket diameter, which can drive up the required bolt area even further, requiring still larger bolts, etc, so that it just feeds on itself.
You need to (some or all): use higher allowable bolts, use a smaller gasket diameter and width, use a gasket with lower factors.
As others have noted, this is an extremely large, extremely high pressure design. A bolted joint may not be suitable.
Regards,
Mike
RE: WNRF Flange Design for 1660 mm ID with Design Pressure 130 bar
RE: WNRF Flange Design for 1660 mm ID with Design Pressure 130 bar