Slotted Holes Flanges
Slotted Holes Flanges
(OP)
Dear all,
Does anyone know a reference where is stated that ASME flanges calculation is irrespective of the shape of bolt holes?.
Thanks in advance
Does anyone know a reference where is stated that ASME flanges calculation is irrespective of the shape of bolt holes?.
Thanks in advance





RE: Slotted Holes Flanges
When you want to use a nonstandard pressure component you must qualify it per the requirements of the Code you are mandated to use. The ASME Codes give you a way to do that and FEA may be the easiest of the prescribed methods available to you.
Regards, John
RE: Slotted Holes Flanges
Regards
RE: Slotted Holes Flanges
I don't get into Div. 1 App. 2 as often as I used to... Is there any limitation or consideration of the quantity and size of bolt holes anywhere in the calc's? I'm not aware of any. If not, then could I not hypothetically cut large holes near the edge and the hole just happens to go past the edge to form a type of slot?
Or, a similar but different situation that I'm aware of where a flange for a replacement component was made with holes ON the centerlines while the existing mating flange had the holes straddling centerlines. One proposed solution was to simply re-drill the new flange so that it would have twice as many bolt holes as planned. Is there anything which would prohibit this? What if the existing flange had another set of holes drilled so that each hole had a bolt in it? Eventually you could wind up with a very short ligament between bolt holes. I'm not aware of any restriction on this in App. 2.
jt
RE: Slotted Holes Flanges
However, the length of the ligament between bolt holes is related to the thickness of the flange, that's the reason one cannot keep drilling holes in a flange calculated for a number and size of bolts/bolt holes.
cheers,
gr2vessels