Ovality tolerance

[N Anilkumar]

Dear All,   Can anybody tell me, what's the ovality tolerance of cylindrical shell pressure vessel (ID 4300 mm and plate thickness 12mm).   Regards, Anil

[tong tong]

Dear Anil,

Out of roundness measure in cylindrical shell under internal pressure should be determined using formula Dmax - Dmin which must not exceed 1 percent of Nominal diameter. Please refer to UG-80 a and fig UG 80.2. Please let me know if I'm wrong

[Bathula Raghuram (Mumbai - PIPING)]

if your are designing as per ASME Sec VIII div 1 pl. refer UG-80
________________________________

[PB HEGDE]

Dear Anil

 

Please refer UG80 of Sec VIII Div 1 You can have 1% ovality is acceptable but It is case to case basis i.e Higher the Dia , it should be kept less than 0.5% even the acceptable tolerance is high b) higher ovality will cause more offset in weld seam

ii) In case of heat exchanger , You can not afford to accept higher ovality . You should target less than 0.25% ,Higher ovality will give problem in tube bundle insertion.

Regards

 

Hegde P.B.

 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of N Anilkumar
Sent: Wednesday, May 13, 2009 4:04 PM
To: material...@googlegroups.com
Subject: [MW:2184] Ovality tolerance

 

Dear All,

[Ramprasad Chari]

It is 1% as per Section VIII Div 1 for unfired Pressure Vessels.Customer however sometimes demands stringer requirement than this.

regards

Aarpee

[Tansu Ozcelebi (GMAIL)]

For this Inner dimension (4300mm), if we  target %0,25. Is that mean about +-102mm ?

Regards,

 

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