Re: [MW:23283] Tube to tubesheet welding

If its seal weld then Normal GTAW process WPS as per ASME SEC IX can be used for welding. No need to go for Tube to tube sheet Mock-up.

Thanks & Regards,

Mohd. Azam

Doha-Qatar

On Thu, May 14, 2015 at 12:29 PM, <george.dilintas@gr.bureauveritas.com> wrote:

As per QW-193.1, you have to duplicate the tube hole configuration and the tube-to-tubesheet joint design within the limits of the essential variables

best regards

Dr. Georgios Dilintas

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venkkatesh krishnan ---14/05/2015 11:52:03---Dear Experts, I need to do tube to tubesheet mock up test, as per qw-193 the

From: venkkatesh krishnan <venkkateshkrishnan@gmail.com>
To: materials-welding@googlegroups.com
Date: 14/05/2015 11:52
Subject: [MW:23281] Tube to tubesheet welding
Sent by: materials-welding@googlegroups.com

Dear Experts,

I need to do tube to tubesheet mock up test, as per qw-193 the thickness of the tubesheet in the mockup test assembly shall be at least as thick as the production tubesheet, except it is not required to be thicker than 2 in. (50 mm),

Existing Design:
Tubesheet thickness is 85mm
Joint Detail: Double groove + expansion and groove with seal welding
Expansion area: full length leaving 3.2mm from back side.

Based on above said point tubesheet exceed 50mm thk there is no need to same as production coupon, so if i am taking 50mm thickness leaving 3.2mm from backside and remaining area expansion + welding it's correct way(expansion area is 47mm),but actual existing expansion area is 82mm, so I have to take 85mm to mock up test instead of 50mm or go with 50mm thickness with 47mm only expansion area which one is correct?
I attached 2d drawing of tube to tubesheet joint detail, Kindly clarify my doubt.

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