Can we call this a ANSI B16.5 standard flange?
Can we call this a ANSI B16.5 standard flange?
(OP)
Hello everybody,
I am recently working on an Exchanger for Lube oil service.
It is a very small exchanger and is to be used for cooling of Lube oil with cooling water. Shell ID is just 141.3mm and the exchanger body flanges and shell are made up of 5" pipe / ANSI B 16.5 standard flanges.
However since the exchanger is TEMA type BEW (Externally sealed type floating head), the rear shell side flanges (5", 150#, RF)have been machined by the Vendor at gasket seating face to incorporate the gasket support ring for the floating tubesheet.Please refer the attached sketch for details.
My question is - Can we still call this a ANSI B16.5, Standard RF flange for which no design calculations are necessary?
I am not sure but I just heard from some other discussions that once a standard flange is machined in anyway, it is no longer compliant to B16.5 standard and must be calculated / designed as per ASME App.2 / other acceptable method.
Kindly share your opinion.
Thanks everybody who spent time reading and answering this post....i really appreciate the kind gesture of the experts out here...
I am recently working on an Exchanger for Lube oil service.
It is a very small exchanger and is to be used for cooling of Lube oil with cooling water. Shell ID is just 141.3mm and the exchanger body flanges and shell are made up of 5" pipe / ANSI B 16.5 standard flanges.
However since the exchanger is TEMA type BEW (Externally sealed type floating head), the rear shell side flanges (5", 150#, RF)have been machined by the Vendor at gasket seating face to incorporate the gasket support ring for the floating tubesheet.Please refer the attached sketch for details.
My question is - Can we still call this a ANSI B16.5, Standard RF flange for which no design calculations are necessary?
I am not sure but I just heard from some other discussions that once a standard flange is machined in anyway, it is no longer compliant to B16.5 standard and must be calculated / designed as per ASME App.2 / other acceptable method.
Kindly share your opinion.
Thanks everybody who spent time reading and answering this post....i really appreciate the kind gesture of the experts out here...





RE: Can we call this a ANSI B16.5 standard flange?
RE: Can we call this a ANSI B16.5 standard flange?
It appears you have not removed the entire raised face, however, as long as you have not reduced the tf dimension, I'd say you are B16.5 compliant.
Some might take issue with the jackscrew and dowel hole drilling, however I personally would not.
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: Can we call this a ANSI B16.5 standard flange?
RE: Can we call this a ANSI B16.5 standard flange?
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: Can we call this a ANSI B16.5 standard flange?
I would definitely take issue with the other holes - they would result in the flange not being compliant to ASME B16.5.
RE: Can we call this a ANSI B16.5 standard flange?
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: Can we call this a ANSI B16.5 standard flange?
I will proceed considering these flanges as standard ASME B 16.5 flanges..
RE: Can we call this a ANSI B16.5 standard flange?
This is not B16.5 flange to me.
Happy new year!
e6155
RE: Can we call this a ANSI B16.5 standard flange?
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: Can we call this a ANSI B16.5 standard flange?
I would double you on this one....such holes are a commonplace in almost all Heat Exchanger girth flanges designed as per Appendix 2 of Code...i never seen any "Design calculations" for all such small holes.Hope the same applies to ASME B 16.5 flanges also..
D2HANDLE
RE: Can we call this a ANSI B16.5 standard flange?
Regards,
Mike
The problem with sloppy work is that the supply FAR EXCEEDS the demand
RE: Can we call this a ANSI B16.5 standard flange?