Interpretation of Clause UW 15 (b) (1) - ASME Section VIII Div 1.

[limesh M]

Dear All,

Quoted below is the ASME Section VIII Div 1 requirement per UW 15 (b) (1):

(b) Strength calculations for nozzle attachment welds for pressure loading are not required for the following:

(1) Figure UW-16.1 sketches (a), (b), (c), (d), (e), (f-1), (f-2), (f-3), (f-4), (g), (x-1), (y-1), and (z-1), and all the sketches in Figs. UHT-18.1 and UHT-18.2;

In accordance with above almost all nozzle weld attachments  are excluded from strength calculations. This appears to be contradicting with UG-41 requirements.

Can anyone please clarify?

Regards,

Limesh

[T. Rizal H.]

UW-15(b)(1) is taking about weld strength.

UG-41 is taking about reinforcement pad.

it is diferent.

General explanation: You calc reinforcement area use UG-41, then weld strength not required to be calc when your weld joint design of nozzle to shell as per UW-25(b)(1).

 

Thanks

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Regards,

T. Rizal Hidayat

[george....@gr.bureauveritas.com]

Strength calculations are exempted as per UG 41(b)(3) which sends you to UW15 which again sends you to some figures of UW-16.1.
If you look closely those particular figures you will realize that we have full penetration welds. Because of that strength calculations are not required, just only calculations for the need or not of reinforcement.

best regards

Dr. Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor

I&F Regional Technical Manager
Bureau Veritas Piraeus - Greece
Tel: +30 210 40 63 113/4
Fax: +30 210 40 63 118
Cell: +30 69 44 64 62 04
limesh M <lime...@gmail.com>

limesh M <lime...@gmail.com> Sent by: material...@googlegroups.com 02/05/2011 07:30 Please respond to material...@googlegroups.com

To "Materials & Welding" <material...@googlegroups.com> cc Subject [MW:10916] Interpretation of Clause UW 15 (b) (1) - ASME Section VIII Div 1. Ref

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