Re: [MW:14526] Can Complete Bore (ID) machining of Flanges is acceptable for ASME U stamped Pressure vessels

dear Ali,

yes u can bore very well but the answer in not so simple.

u can bore with the dimensional restriction of B 16.5 

go to the WNRF flanges dimensiontable.

check the length though HUB which is called "Y" in table . 

while doing machining from inside the length through HUB dimension ( Y) getting reducing as you increasing the inside diameter.

check the tolerences. if after machining the flange meeting the required height . it will be acceptable otherwise Authorized Inspector will reject the flange .

i was in  a same situation 2 months ago . luckily after machining or flange meet the tolerance.

Thanks

Regards

Ansari.

On Mon, Jun 11, 2012 at 4:03 PM, Prasad Ghanekar <prsgne@gmail.com> wrote:

I understand that the flange is ASME B 16.5 WN type.

Yes, flange can be bored to suit corresponding pipe schedule.

Please see attached code interpretation (B16.5 1996 Interpretations).

 

Regards,

 

Prasad

On Sun, Jun 10, 2012 at 12:05 AM, Aly <mhaskar.aly@gmail.com> wrote:

Dear Sir,   Please advise,   Requirement as per drawing: 3" S160 flange; Supplier has machined the complete bore (ID) of 3"SXXS flange and supplied.   Can we use this flange for ASME coded (U stamped) vessels as per ASME SEC VIII-1.   If not , kindly provide some Code reference.......      Ali Mhaskar

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Regards
Ansari Intekhab Alam

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