Assuming you are using ASME B&PV Code, then in general you may use a plate qualification as the tube-to-tubesheet weld is a partial penetration weld. However if your customer or the design/fabrication Code requires qualification by mock-up testing then Section IX QW-193, QW-288, and QW-303.5 apply.
Section VIII Division I and Section I do not require the use of mock-ups.
Note that some older customer specifications will require mock up testing or tube-to-tubesheet qualification in accordance with Section VIII, Division 2, Article F-3. This portion of Sc VIII has been deleted and replaced by the Sc IX paragraphs cited above.
“QW-193 Tube-to-Tubesheet Tests
When the applicable Code Section requires the use of this paragraph for tube-to-tubesheet demonstration mockup qualification, QW-193.1 through QW-193.1.3 shall apply.”
John
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of skrie85
Sent: Thursday, September 16, 2010 10:46 PM
To: materials-welding@googlegroups.com
Subject: [MW:7052] welding tube to tubesheet
I want to welding tube to tubesheet. I have qualified GTAW before by using plate (not mock-up test). Can I welding tube to tubesheet by using qualification of GTAW?
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