Blind Flanged on reactor vessel - Thickness and shape
Blind Flanged on reactor vessel - Thickness and shape
(OP)
I need to performe a pressure hydraulic test on a reactor vessel which has a diameter of aprox 3 meters and an opening on the top of about 1,5 m diameter long.The pressure test will be 30 bar.
I was thinking of installing a blind straight flange on the opening but i was told that the flange should be spherical (dished).
Is this true? How do I set the thickness for the flange?
Thank you
I was thinking of installing a blind straight flange on the opening but i was told that the flange should be spherical (dished).
Is this true? How do I set the thickness for the flange?
Thank you





RE: Blind Flanged on reactor vessel - Thickness and shape
Is the opening a nozzle?
Does it have a flange or just a stub end ? If a flange what type?
If not a nozzle, just a hole, how do you propose to test the vessel after the a permeant closure is made?
If this is stub end a dished head will be was to go. Still come back with more information.
RE: Blind Flanged on reactor vessel - Thickness and shape
RE: Blind Flanged on reactor vessel - Thickness and shape
After blinding that opening there are other inlets on the vessel that will make it possible to pressurize,
ES
RE: Blind Flanged on reactor vessel - Thickness and shape
Brian
www.mcabeeconstruction.com
Opinions expressed are my own and are not those of the company.
RE: Blind Flanged on reactor vessel - Thickness and shape
The use of a flat blind with stiffening ribs would be a normal choice, the alternatives being:
-a flat blind without ribs: the thickness in this case would be of the order of 100 mm, likely more than the existing flange thickness, so you could need buying new bolts...
-a domed end (semi elliptical, or a dish per fig.1-6(d)), but this one must be welded to a flange, and the construction of the flange alone could cost more or the same as a full blind with the same thickness.
Of course in all cases, and especially for the ribbed cover, you need to calculate what you do, unless you want to build the cover at least two times...
prex
http://www.xcalcs.com
Online tools for structural design