where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

460 views
Technical Discussions
Dave Wilkes
Dave Wilkes
03:35 Jan-24-2002
Gamma Shot of a Celtic Cross

A historical society in Ireland have a Celtic Cross which is
14 inches in diameter and made of sandstone. They want to know
if it has been pinned during its construction and would like
to take a Gamma Ray Radiograph. The only source available
at the moment is Ird 192 16 ci. My money says it won't have
sufficient penetrating power. Does anyone have any experience
on shooting Sandstone ? Or any idea of other ndt tests that
could achieve the same result. Sounds like its a job for
the concrete testing boys.



    
 
 
Martin Schickert
R & D,
Institute for Materials Research and Testing, Germany, Joined Jan 2000, 18

Martin Schickert

R & D,
Institute for Materials Research and Testing,
Germany,
Joined Jan 2000
18
04:50 Jan-24-2002
Re: Gamma Shot of a Celtic Cross
: A historical society in Ireland have a Celtic Cross which is
: 14 inches in diameter and made of sandstone. They want to know
: if it has been pinned during its construction and would like
: to take a Gamma Ray Radiograph. The only source available
: at the moment is Ird 192 16 ci. My money says it won't have
: sufficient penetrating power. Does anyone have any experience
: on shooting Sandstone ? Or any idea of other ndt tests that
: could achieve the same result. Sounds like its a job for
: the concrete testing boys.
.

It depends on material and size of the suspected pin.

Ultrasound: To detect a metal pin of 10 mm diameter in a depth of 180 mm you need specialised concrete-testing, pulse echo equipment. Looks possible if surface is o.k., and if there are no internal cracks.

Other possibilities seem to be x-rays, gamma rays, radar, and maybe even a less costly cover meter (used for reinforced concrete): please asks experts in these fields.



    
 
 
Jamie Gauthier
Jamie Gauthier
06:21 Jan-24-2002
Re: Gamma Shot of a Celtic Cross
You could try Ground Pentetrating Radar (GPR) to determine if it the Celtic Cross was pinned.


    
 
 

Product Spotlight

NEOS III

NEOS III is Logos Imagings lightest DR system. With a built in \r\nbattery and internal wireless c
...
ommunication, the NEOS III is perfect \r\nfor users that want to quickly assess an item.
>

NDT.net launches mobile-friendly design

NDT.net has revamped its website providing a mobile-friendly design.The front page received a comp
...
letely new design and all other sections are now reacting responsively on mobile devices. This has been a major step to make our website more user- friendly.
>

TVC awarded UKAS accreditation

TVC are delighted to finally announce we have been awarded UKAS accreditation for our calibration
...
laboratory. Laboratory accreditation to ISO/IEC 17025:2005 enables us to conduct the Electrical Verification of Ultrasonic Flaw Detection Equipment to BS EN 12668-1:2010. It has taken many months of hard work and we want to thank our staff for all their efforts during this massive undertaking.
>

Navic - Steerable Modular Automated Scanner

The Navic is a modular, motorized, steerable scanner designed to carry multiple attachments used
...
in various scanning and inspection applications. The Navic is capable of weld scanning (girth welds and long seam welds), automated corrosion mapping, and tank scanning.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window