Raised face spiral finish
Raised face spiral finish
(OP)
Hi guys, ASME B16.5 mentions that a flange face should have a certain roughness and be spiral or concentrically machined.
We have received some valves that AREN'T spiral or concentrically machined but probably do have the required roughness.
They we machined using a milling machine and to me they look unacceptable.
Is the spiral or concentric finish an absolute must or is the surface finish enough to sneak them thru the required standard?
Thanks
Thirlmere
We have received some valves that AREN'T spiral or concentrically machined but probably do have the required roughness.
They we machined using a milling machine and to me they look unacceptable.
Is the spiral or concentric finish an absolute must or is the surface finish enough to sneak them thru the required standard?
Thanks
Thirlmere





RE: Raised face spiral finish
Show us what the measurements are, and what the photographs look like.
Your question is like: I am taller than my sister.
Am I tall enough?
RE: Raised face spiral finish
What i'm asking is if the pattern is important or just the surface roughness.
And i don't have a sister
RE: Raised face spiral finish
Please still post a picture of the raised face machining though!
RE: Raised face spiral finish
To me that just seems to be non compliant.....Your thoughts?
RE: Raised face spiral finish
RE: Raised face spiral finish
RE: Raised face spiral finish
RE: Raised face spiral finish
Regards
Thirlmere
RE: Raised face spiral finish
RE: Raised face spiral finish
The requirement for concentric or spiral is a shall, meaning mandatory requirement. Therefore this flange facing is not compliant. There should be no doubt about this.
RE: Raised face spiral finish
RE: Raised face spiral finish