hole in flange side
hole in flange side
(OP)
I'm using a 5"-150 B16.5 flange. We want to make a threaded hole in the side of the flange to allow us to place a bleedvalve on the flange.
I understand that if we make a hole in a 16.5 type flange this flange seizes to be a B16.5 flange. Is there a code to what we can refer that allows us to make a hole in this flange. We calculated the strength of the flange and this is not an issue.
I understand that if we make a hole in a 16.5 type flange this flange seizes to be a B16.5 flange. Is there a code to what we can refer that allows us to make a hole in this flange. We calculated the strength of the flange and this is not an issue.





RE: hole in flange side
It is common practice to similarly bore flanges for flow element instrument tappings, but in a 150# system it is normal to use 300# flanges for this.
RE: hole in flange side
There is 8bar on the system The hole is 0,24" and a 1/4"NPT hole to screw in the valve.
RE: hole in flange side
allready done all the work
RE: hole in flange side
RE: hole in flange side
RE: hole in flange side
We have numerous vertical heat exchangers with shells fabricated from pipe with fixed tube sheets and on these tube sheet flanges we drill four compass point holes to vent the sheet.
You also might want to look at bleed rings.
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