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 >
Crack detection in pipe
Career Discussions
Job Offers
Job Seeks
Classified Ads
About NDT.net
Articles & News

381 views
07:57 Jan-28-2008
Philip Ducharme
Crack detection in pipe

I need to find a solution to find and “size” small cracks in pipes.

The cracks are oriented parallel to weld, are located ID and could be as small as less than 0.5 mm and are in the HAZ. The material is a standard carbon steel pipe 3/8” (almost brand new) diameter 8” or 10”. We shall inspect in service, and then we only have access from the OD side. There is no coating, but as the cracks are located in a double-elbow (“S” shape) room for scanner or probe is restricted.


Do you have any suggestion?

regards,

Philip



 
01:47 Jan-28-2008

Michael Moles †2014 *1948

,
Joined

Re: Crack detection in pipe ----------- Start Original Message -----------
: I need to find a solution to find and “size” small cracks in pipes.
: The cracks are oriented parallel to weld, are located ID and could be as small as less than 0.5 mm and are in the HAZ. The material is a standard carbon steel pipe 3/8” (almost brand new) diameter 8” or 10”. We shall inspect in service, and then we only have access from the OD side. There is no coating, but as the cracks are located in a double-elbow (“S” shape) room for scanner or probe is restricted.
:
: Do you have any suggestion?
: regards,
: Philip
------------ End Original Message ------------
We have some suggestions for you. Use back diffraction to start; you can get down close to 0.5 mm.

The ID creeping wave approach is also good for detecting (and siZing) small defects.

You can do both techniques with an OmniScan.

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|