Flange Serration Face Damage
Flange Serration Face Damage
(OP)
Hi,
Good Day!!!!
Design Code - ASME B31.3
Flange Dimensional Code - ASME B16.5
We have a WNRF Flange of Dia 20" of which the serration face is damaged (Approximately 3mm Depth and Length 60mm) due to the improper handling.
Can any one recommend me the correct procedure to rectify the damage and whether the code ASME B16.5/ASME B31.3 is permitting for such repairs or rejecting the flange is the only solution for this kind of cases.
Thanks in advance for your technical input.
Good Day!!!!
Design Code - ASME B31.3
Flange Dimensional Code - ASME B16.5
We have a WNRF Flange of Dia 20" of which the serration face is damaged (Approximately 3mm Depth and Length 60mm) due to the improper handling.
Can any one recommend me the correct procedure to rectify the damage and whether the code ASME B16.5/ASME B31.3 is permitting for such repairs or rejecting the flange is the only solution for this kind of cases.
Thanks in advance for your technical input.





RE: Flange Serration Face Damage
Depth of allowable defects, especially axial ones are very small. 3mm deep sounds way too deep to me.
Normally you need to weld repair overlay and then re-mill to get the face acceptable.
If it wasn't my fault I would just send it back and get another one. The amount of time and effort you will spend getting it repaired is likely to be higher than the difference....
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Flange Serration Face Damage
RE: Flange Serration Face Damage
RE: Flange Serration Face Damage
This only allows a 6mm long and / or deep imperfection deeper than the serrations.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Flange Serration Face Damage
In one of his papers he covered some nice 'shortcomings' of ASME B16.5 (& B16.47) flanges.
The paper is called "Dissecting the Dinosaur; Problems With B16.5 and B16.47 Flange Standards".
In the paper, he also covered the allowable flange face defects B16.5 handles, para 6.4.6. The paper reads the following to that remark;
You might want to get a copy of that paper, to read the whole section on this subject, and see how interesting it is what still may be incorrect in B16.5.
If BFJ has your interest, there's more interesting work from Warren you might want to grab.