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 -

2621 views
Technical Discussions
azmi
azmi
01:21 Jul-04-2007
UT after MT. Surface preparation

Does it enough to perform UT after MT with manual cleaning on surface after MT? What i mean, UT still can be performed eventhough the weld surface is not cleaned by power brush.


 
 Reply 
 
chris s
chris s
08:00 Jul-06-2007
Re: UT after MT. Surface preparation
----------- Start Original Message -----------
: Does it enough to perform UT after MT with manual cleaning on surface after MT? What i mean, UT still can be performed eventhough the weld surface is not cleaned by power brush.
------------ End Original Message ------------

that should be fine. you will have problems if you ut and then mag. the ut gel will need to be completely removed.


 
 Reply 
 
Nigel Armstrong
Engineering, - Specialist services
United Kingdom, Joined Oct 2000, 1096

Nigel Armstrong

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1096
06:33 Jul-11-2007
Re: UT after MT. Surface preparation
It depends on the overall condition of the scan surface(s). If such surfaces were very clean, smooth and free of spatter and other surface irregularities, then the MPI technician will only have needed to apply a very fine and even thickness contrast coating prior to MPI. This would make UT on the painted surface possible if the contast coat is tightly adhering and very thin. However if the surface condition was poor at the time of MPI, then you can expect a much thicker, less even thickness coating - MOPI techs tend to spray contrast coating until it looks a good smooth finish. My general advice would be to power brush the scanning surfaces prior to MPI because this allows the technician(s) more control over both the MPI (thinner more even coating) and the UT ( better probe coupling and manipulation) leading to a higher probability of detection of defects.


----------- Start Original Message -----------
: : Does it enough to perform UT after MT with manual cleaning on surface after MT? What i mean, UT still can be performed eventhough the weld surface is not cleaned by power brush.
: that should be fine. you will have problems if you ut and then mag. the ut gel will need to be completely removed.
------------ End Original Message ------------




 
 Reply 
 
chris s
chris s
00:18 Jul-12-2007
Re: UT after MT. Surface preparation
----------- Start Original Message -----------
: It depends on the overall condition of the scan surface(s). If such surfaces were very clean, smooth and free of spatter and other surface irregularities, then the MPI technician will only have needed to apply a very fine and even thickness contrast coating prior to MPI. This would make UT on the painted surface possible if the contast coat is tightly adhering and very thin. However if the surface condition was poor at the time of MPI, then you can expect a much thicker, less even thickness coating - MOPI techs tend to spray contrast coating until it looks a good smooth finish. My general advice would be to power brush the scanning surfaces prior to MPI because this allows the technician(s) more control over both the MPI (thinner more even coating) and the UT ( better probe coupling and manipulation) leading to a higher probability of detection of defects.
:
: : : Does it enough to perform UT after MT with manual cleaning on surface after MT? What imean, UT still can be performed eventhough the weld surface is not cleaned by power brush.
: : that should be fine. you will have problems if you ut and then mag. the ut gel will need to be completely removed.
------------ End Original Message ------------

i did not see any mention of a paint coating



 
 Reply 
 
Nigel Armstrong
Engineering, - Specialist services
United Kingdom, Joined Oct 2000, 1096

Nigel Armstrong

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1096
05:33 Jul-13-2007
Re: UT after MT. Surface preparation
chris

If a fluorescent technique not requiring a contrast paint coating is required, then surface condition is even more critical. In nearly all other cases a contrast paint coat is required.

----------- Start Original Message -----------
: : It depends on the overall condition of the scan surface(s). If such surfaces were very clean, smooth and free of spatter and other surface irregularities, then the MPI technician will only have needed to apply a very fine and even thickness contrast coating prior to MPI. This would make UT on the painted surface possible if the contast coat is tightly adhering and very thin. However if the surface condition was poor at the time of MPI, then you can expect a much thicker, less even thickness coating - MOPI techs tend to spray contrast coating until it looks a good smooth finish. My general advice would be to power brush the scanning surfaces prior to MPI because this allows the technician(s) more control over both the MPI (thinner more even coating) and the UT ( better probe coupling and manipulation) leading to a higher probability of detection of defects.
: :
: : : : Does it enough to perform UT after MT with manual cleaning on surface after MT? What i mean, UT still can be performed eventhough the weld surface is not cleaned by power brush.
: : : that should be fine. you will have problems if you ut and then mag. the ut gel will need to be completely removed.
: i did not see any mention of a paint coating
------------ End Original Message ------------




 
 Reply 
 
chris s
chris s
08:09 Jul-17-2007
Re: UT after MT. Surface preparation
----------- Start Original Message -----------
are you talking about a developer?

: chris
: If a fluorescent technique not requiring a contrast paint coating is required, then surface condition is even more critical. In nearly all other cases a contrast paint coat is required.
: : : It depends on the overall condition of the scan surface(s). If such surfaces were very clean, smooth and free of spatter and other surface irregularities, then the MPI technician will only have needed to apply a very fine and even thickness contrast coating prior to MPI. This would make UT on the painted surface possible if the contast coat is tightly adhering and very thin. However if the surface condition was poor at the time of MPI, then you can expect a much thicker, less even thickness coating - MOPI techs tend to spray contrast coating until it looks a good smooth finish. My general advice would be to power brush the scanning surfaces prior to MPI because this allows the technician(s) more control over both the MPI (thinner more even coating) and the UT ( better probe coupling and manipulation) leading to a higher probability of detection of defects.
: : :
: : : : : Does it enough to perform UT after MT with manual cleaning on surface after MT? What i mean, UT still can be performed eventhough the weld surface is not cleaned by power brush.
: : : : that should be fine. you will have problems if you ut and then mag. the ut gel will need to be completely removed.
: : i did not see any mention of a paint coating
------------ End Original Message ------------




 
 Reply 
 

Product Spotlight

Extended Range Variable Wall® Piping Calibration Blocks for Longseam Inspection

This set of two blocks has been specially designed for situations where ultrasonic examination tak
...
es place circumferentially or “around the curve” for applications such as inspection of longseam welds in piping and vessels. Jointly designed by PH Tool and Holloway NDT, the blocks feature side-drilled hole reflectors positioned within novel compound-curves, each with multiple thickness steps. The unique design results in a light and compact form factor, with the largest block weighing just over 15 lbs and spanning just 16 ¾”. Coverage is provided for nominal pipe sizes from 6” to 10” in the small block and 12” to a whopping 56” in the large block. The compound OD curves and multiple wall thicknesses actually exceed ASME requirements, providing exceptional signal response and measurement accuracy. Properly managing beam divergence off the ID and stabilizing beam skew due to probe rocking is essential to maintaining a consistent calibration when inspecting lengthwise on curved surfaces.
>

AIS229 - Multipurpose Real Time System

Latest standard & automatic real time system developed by Balteau. The AIS229 has been designed to
...
do series inspection in a wide variety of industry. Composed of a shielded cabinet, 5 axis manipulator, x-ray generator and tubehead from 160kV to 225kV, a fl at panel & much more, the AIS229 is most certainly one of the most multipurpose RTR system available on the market.
>

NDT Master Lecturer

In the program both university professors and practitioners will give lectures, which guarantees the
...
oretical depth and practical inside. Academic Director: Prof. Dr. Christian Boller
The following lecturers are not complete: Prof. Tadeusz Stepinski, Prof. Wieslaw Staszewski, Prof. Frank Walther, Prof. Giovanni Bruno, Prof. Gerd Dobmann, Prof. Philippe Guy
>

OPBOX with standard software is able to do all types of inspections and measurements: flaw detection in welds and materials, scanning of objects, testing composite materials, forged and moulded pieces, many UT inspections, measurements of properties of ma

Typical applications: UT measurements with pulse technique, Measurement of thicknesses also at hig
...
h temperatures, Measurements of properties of materials, including fluids and gases We are delivering a standard version of the software (for any Microsoft Windows up to 10 x64 with Microsoft Hardware certification report Approved) and for special needs: SDK with ready to use examples for LabView, MATLAB x64, C++ wrapper for dll, Python and Linux., and also low-level description of how to control our devices directly from any USB tools
>

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