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 -

Acoustic Emission Consulting, Inc.
Acoustic Emission Consulting, Inc. specializes in the design of small portable AE instruments for field and lab use.

801 views
Technical Discussions
a.chagas
Other, QC SUPERVISOR
GE - Setubal, Portugal, Joined Oct 1999, 1

a.chagas

Other, QC SUPERVISOR
GE - Setubal,
Portugal,
Joined Oct 1999
1
01:18 Jul-09-1999
A problem with Magnetic Testing

Hi,
On welding of tube, 5ox5mm with two differents materials (SA213T91 and SA213T22)we have a linear indication (longitudinal),from Magnetic Testing.
Can you give us an explanation, about the origin of this problem?
Best regards, waiting for solution to this problem.


    
 
 
Michael Trinidad
Consultant,
LMATS Pty Ltd , Australia, Joined Jan 2003, 138

Michael Trinidad

Consultant,
LMATS Pty Ltd ,
Australia,
Joined Jan 2003
138
09:41 Jul-09-1999
Re: A problem with Magnetic Testing
Hi,
On welding of tube, 5ox5mm with two different materials (SA213T91 and SA213T22)we have a linear indication (longitudinal),from Magnetic Testing.
Can you give us an explanation, about the origin of this problem?
Best regards, waiting for solution to this problem.


This can be quite a common problem if there is a significant permeability difference between the two steels. What you are most likely seeing is the flux leakage occurring at the permeability change

Michael Trinidad
ETRS NDT Project Supervisor
KBJV Worsley Expansion Project
Direct Tel: 61-8-9781-6232
Fax: 61-8-9781-6233
Email: etrs@kbjv.com




    
 
 
David Hermanutz
Consultant,
Hbndt.com, China, Joined Jul 2012, 85

David Hermanutz

Consultant,
Hbndt.com,
China,
Joined Jul 2012
85
04:13 Jul-11-1999
Re: A problem with Magnetic Testing
: Hi,
: On welding of tube, 5ox5mm with two different materials (SA213T91 and SA213T22)we have a linear indication (longitudinal),from Magnetic Testing.
: Can you give us an explanation, about the origin of this problem?
: Best regards, waiting for solution to this problem.

:
: This can be quite a common problem if there is a significant permeability difference between the two steels. What you are most likely seeing is the flux leakage occurring at the permeability change

: Michael Trinidad
: ETRS NDT Project Supervisor
: KBJV Worsley Expansion Project
: Direct Tel: 61-8-9781-6232
: Fax: 61-8-9781-6233
: Email: etrs@kbjv.com

It is best to follow up such indications with a dye penetrant procedure to determine the absence of a weld defect.
Or switch to a non magnetic surface test procedure.
In one instance I came across a faulty weld procedure after doing a PMI out of curiosity of such an indication.
148 cut outs and 26 pups later the problem was corrected... (six day overrun on a shutdown due to one typo)

David Hermanutz
Pilbara NDT
Melbourne, Australia





    
 
 

Product Spotlight

FMC/TFM

Next generation for Phased Array UT is here now with FMC/TFM! Have higher resolution imaging, impr
...
oved signal to noise ratio, characterize, size and analyze defects better with access to several wave mode views and save raw FMC data for higher quality analysis.  Some of the benefits are:
  • Beautiful Image! Easier to understand what you're looking at
  • Completely focused in entire image or volume
  • Much easier to define setups before inspection
  • Easier to decipher geometry echoes from real defects
  • Oriented defects (e.g. cracks) are imaged better
  • See image from different wave modes from one FMC inspection
  • FMC data can be reprocessed/analyzed without going back to the field
>

NEW Wheel Type Phased Array Probe

DOPPLER NEW Wheel Type Phased Array Probe, more stable, new tyre makes lesser acoustic attenuation
...
, much lighter makes easier to handle, more slim size, magnetic and mechanical encoder optional etc...more
>

GEKKO - Portable Phased Array Testing with TFM in Real-Time

The portable phased array testing system GEKKO provides 64 parallel test channels. On creating testi
...
ng parameters the operator is assisted by the CIVA software. Due to its modular set-up the GEKKO instrument is suitable for operators of all skill levels.
>

NEOS III

NEOS III is Logos Imagings lightest DR system. With a built-in battery and internal wireless commu
...
nication, the NEOS III is perfect for users that want to quickly assess an item.
>

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