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#36974 - 07/21/10 02:06 PM WRC-107 - Vessel Diameter in a Ellipsoidal Head
Guilherme Offline
Member

Registered: 07/21/10
Posts: 4
Loc: Araraquara, São Paulo - Brazil
Hi.

I'm performing a WRC-107 calculation on a ellipsoidal head and I saw that, in the report, the program considers the Vessel Diameter as being " 1,8 * ID ".

Can anyone explain me why the program don't consider the original internal head diameter to perform this calculation?

Best regards,

Guilherme

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#36983 - 07/22/10 03:23 AM Re: WRC-107 - Vessel Diameter in a Ellipsoidal Head [Re: Guilherme]
SK Tan Offline
Member

Registered: 01/15/09
Posts: 66
Loc: Malaysia
Hi, Guiherme.

Crown radius = 0.9 ID per UG-32 D of VIII-1.

Diameter = 2 x radius = 1.8 ID.

PV Elite is using this diameter geometry to conduct WRC-107 analysis.

Wish above helps.

SK

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#37003 - 07/22/10 01:37 PM Re: WRC-107 - Vessel Diameter in a Ellipsoidal Head [Re: SK Tan]
Guilherme Offline
Member

Registered: 07/21/10
Posts: 4
Loc: Araraquara, São Paulo - Brazil
Thanks for your reply.

Best regards,

Guilherme

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#37017 - 07/22/10 09:41 PM Re: WRC-107 - Vessel Diameter in a Ellipsoidal Head [Re: Guilherme]
Mukesh Offline
Member

Registered: 11/12/06
Posts: 125
Loc: Ahmedabad, Gujarat, India
When the connection is on dished end, PV Elite determine its spherical radius per Code as explained by S K Tan, and then do the local load analysis for nozzle to shperical vessel.

WRCB-107 covers local load analysis on cylinderical vessel and spherical vessel.

Hope it is clear...

Mukesh Chopra
www.theculminates.com
M: +91-9428500192



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