Re: [MW:14527] Can Complete Bore (ID) machining of Flanges is acceptable for ASME U stamped Pressure vessels

Dear sir

Manufacture can do Machining form Higher Sch to Lower Sch & also the dimension
shall be comes within tolarnce of ASME B16.5.

IF NOT THEN FLANGE IS REJECTED

On Tue, Jun 12, 2012 at 4:16 PM, Ansari intekhab alam <ansari.ndt@gmail.com> wrote:

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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