where expertise comes together - since 1996

Web's Largest Portal of Nondestructive Testing (NDT)
Open Access Database (Conference Proceedings, Articles, News), Exhibition, Forum, Network

All Forum Boards
Technical Discussions >
Perfered DAC setup hole vs notches
Career Discussions
Job Offers
Job Seeks
Classified Ads
About NDT.net
Articles & News

664 views
07:08 Nov-20-2009
Tony Smith
Perfered DAC setup hole vs notches

For setting up a DAC on a 1/16 drill hole through double girth v weld using a 70 degree wedge with 3.5 Mhz. Isn't the perfered way is using a notch

 
17:18 Nov-20-2009

Roger Duwe

NDT Inspector, API-510, 570, 653
MISTRAS,
USA,
Joined Jan 2009
148
Re: Perfered DAC setup hole vs notches In Reply to Tony Smith at 07:08 Nov-20-2009 (Opening).

Notches are 'preferred' because side-drilled holes are so difficult to macnine into a pipe weld. Notches only give OD and ID. If feasable, 1/4 T /12 T and 3/4T side-drilled holes [like the ASME Basic block] would my strong preference.

 
05:49 Feb-13-2015

David Baeley

Engineering,
Australia,
Joined Dec 2014
17
Re: Perfered DAC setup hole vs notches In Reply to Tony Smith at 07:08 Nov-20-2009 (Opening).

Hi,
I can suggest start drill hole with 15mm to 25mm diameter surface area. In every slide drilled hole can attached with pipes fitting notches.

 


© NDT.net - The Web's Largest Portal of Nondestructive Testing (NDT) ISSN 1435-4934

Open Access Database, |Conference Proceedings| |Articles| |News| |Exhibition| |Forum| |Professional Network|