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 >
Conventional Angle Beam on 1" pipeline
Career Discussions
Job Offers
Job Seeks
Classified Ads
About NDT.net
Articles & News

Eddyfi
Pursuing and developing eddy current array (ECA) technology to its full potential.

1025 views
08:09 Jan-08-2010

gajendran

NDT Inspector
India,
Joined Jul 2009
4
Conventional Angle Beam on 1" pipeline

Dear Sir,

Is there any way to do angle beam inspection on 1" pipeline with 3mm thickness?

 
14:09 Jan-08-2010

Sang Kim

Consultant, NDT Trainer
Guided Wave Analysis LLC,
USA,
Joined Feb 2008
44
Re: Conventional Angle Beam on 1" pipeline In Reply to gajendran at 08:09 Jan-08-2010 (Opening).

Dear Gajendran,

You can test 1-inch-OD pipeline with torsional ultrasonic wave. Because the wall thickness of the tube is 3 mm (Cut-off frequency of T(0,2) mode of 3-mm wall pipe is about 520 kHz), you can inspect the pipe with 250-kHz MsS probe. Using ultrasonic shear couplant, you can quickly test the tube. If you want to located the defect along the pipe circumference, you can use sectional probe to scan along the pipe circumference. We can generate the guided wave along the circumferential or axial direction. With the torsional mode or shear-horizontal mode at 250-kHz center frequency (wavelength 12.7 mm), it can find very small defect compared to 100-mm wavelength at 32 kHz torsional mode.

The high-frequency guided wave is used for inspecting short-range high-resolution inspection using shear-horizontal mode. The other application is to inspect pipe support area, pipe clamp, wall penetration, pipe in concrete vaults, and sleeved pipe.

For more information about MsS guided wave technology, please check this website (http://www.gwanalysis.com).

Sang

 
14:58 Jan-08-2010

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
Re: Conventional Angle Beam on 1" pipeline In Reply to gajendran at 08:09 Jan-08-2010 (Opening).

Yes, you can use either a small 70 degree angle beam that has been axially contoured, or an even smaller 70 degree intergral angle beam assembly. We've had customers who successfully do angle beam inspection on tubing as small as 15 mm diameter. If you're interested in specific part number recommendations from the Panametrics-NDT product line of Olympus NDT, please contact me.

 
16:32 Jan-08-2010

Michael Moles †2014 *1948

,
Joined

Re: Conventional Angle Beam on 1" pipeline In Reply to Tom Nelligan at 14:58 Jan-08-2010 .

You can even do AUT with phased arrays these days. Olympus NDT has commerciallized the COBRA scanner, which goes down to 0.8" diameter. It also uses arrays focused in the lateral direction to minimize beam spread. Like Tom says, you would probably want to use high angle beams (S-scans in this case).

Michael Moles

 


© 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|