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Technical Discussions
Andres
Andres
22:43 Nov-25-2019
Welding Neck Flanges Scanning Plan

Welding neck flange

Hi, what would be a good scan plan for WN flange welding?
I attach a photo.

Should we make 2 index offset displacements?

Someone can attach a scan plan for welding in V and X accessible only from one side.

I'm sorry for my English.

Thank you

 
 Reply 
 
Paul Holloway
Consultant,
Holloway NDT & Engineering Inc , Canada, Joined Apr 2010, 218

Paul Holloway

Consultant,
Holloway NDT & Engineering Inc ,
Canada,
Joined Apr 2010
218
23:33 Nov-25-2019
Re: Welding Neck Flanges Scanning Plan
In Reply to Andres at 22:43 Nov-25-2019 (Opening).

Depending on thickness and neck angle, it may be really difficult to scan from the nozzle and intersect much of the fusion face near 90 degrees. I've done these before from both sides (very shallow neck angle) and 1-sided. For the 1-sided I used 2 standoffs (index offsets).

Hope that helps,
P

 
 Reply 
 
Mario Talarico
NDT Inspector,
Italy, Joined May 2010, 423

Mario Talarico

NDT Inspector,
Italy,
Joined May 2010
423
17:59 Nov-27-2019
Re: Welding Neck Flanges Scanning Plan
In Reply to Paul Holloway at 23:33 Nov-25-2019 .

zoom image

Weld-Flange UT Scanning

andres, in addition:
1) First check if the surface condition of the flange and the flange configuration allow scanning with zero degrees from the flange end (scan pos. 4);
2) if accessible, internal scan 5, half skip.
Caution when scanning from the outside on the flange side: calculate in advance that the angle of incidence on the bottom is not less than 35°.
regards
mario
 
 Reply 
 
Peter Gomez
Netherlands, Joined Dec 2019, 1

Peter Gomez

Netherlands,
Joined Dec 2019
1
05:55 Dec-03-2019
Re: Welding Neck Flanges Scanning Plan
In Reply to Andres at 22:43 Nov-25-2019 (Opening).

It is very obvious it is depending upon the thickness. You can set flange configaration zero degree at initial stages. For more click [url=http://www.facebook.com]scanner[/url]

 
 Reply 
 

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