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 -

1273 views
Technical Discussions
Paulo
Paulo
06:44 Sep-14-2007
Phased Array for Stainless Stell welds

Hello people!!!
Does anybody had already tried to do stainless stell weld inspection with phased array??Have any procedure available?
Thank you!

Paulo


 
 Reply 
 
Michael Moles †2014 *1948
, Joined ,
08:26 Sep-14-2007
Re: Phased Array for Stainless Stell welds
----------- Start Original Message -----------
: Hello people!!!
: Does anybody had already tried to do stainless stell weld inspection with phased array??Have any procedure available?
: Thank you!
: Paulo
------------ End Original Message ------------

Paulo:
Lot's of companies have inspected stainless steels with phased arrays, and procedures may be available from the right people. if you are looking for contacts, please contact me directly by e-mail. You should also give some specifications, e.g. type of stainless, thickness, expected defects etc.
Yours,
Michael



 
 Reply 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1307

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1307
08:29 Sep-14-2007
Re: Phased Array for Stainless Stell welds
Paulo:
whether the ultrasound is generated by a single element or a phased array probe the issues for "ultrasonic" inspection for austenitic materials remain the same.

You will still need to assess what the best frequency and wave mode (compression or shear) will be to achieve the results you are trying for. Phased arrays may provide interesting and useful options for beam angle, Tandem techniques and TRL methods but they are still subject to the same issues of scatter and absorption as any mechanical wave pulse.
Ed


----------- Start Original Message -----------
: Hello people!!!
: Does anybody had already tried to do stainless stell weld inspection with phased array??Have any procedure available?
: Thank you!
: Paulo
------------ End Original Message ------------




 
 Reply 
 
John Brunk
Engineering, NDT Level III
Self employed, part-time, USA, Joined Oct 1999, 162

John Brunk

Engineering, NDT Level III
Self employed, part-time,
USA,
Joined Oct 1999
162
09:11 Sep-14-2007
Re: Phased Array for Stainless Stell welds
----------- Start Original Message -----------
: Hello people!!!
: Does anybody had already tried to do stainless stell weld inspection with phased array??Have any procedure available?
: Thank you!
: Paulo
------------ End Original Message ------------

Some of the conditions that can make ultrasonic evaluation of austenitic stainless steel welds so difficult would not be helped by phased array. Large variations in velcoity and attenuation with changes in direction would cause the phased array to behave quite differently from what would be predicted in more uniform materials. In welds made from one side with one procedure, then back-gouged and the back side done with another procedure, there can be huge differences in acustic properties and a large reflection from the interface. I have sometimes used test specimens with macroetched surfaces and side-driled holes in several locations to painfully sort out an effective technique for manual inspection with several probes. It would be much less difficult to develop a phased array technique in a production environment if it were possible to start working on the inspection as the welding procedures were being developed..



 
 Reply 
 

Product Spotlight

ISAFE3 Intrinsically Safe Sensor System

ISAFE3 intrinsically safe sensor system of Vallen Systeme is especially targeted at the petrochemica
...
l - as well as oil and gas transportation industry. The sensor system is designed for permanent monitoring or periodic inspection tasks. Sensors are available for different AE-frequency ranges optimized for corrosion and fatigue crack detection and other applications. The ISAFE 3 sensor system consists of an AE-sensor (model ISAS3) certified according to ATEX/IEC for installation in zone 0, gas group IIC, IP68, 20 to +60 °C, and a signal isolator (model SISO3) certified for installation in zone 2. An ISAS3 sensor can be mounted in atmosphere or submerged, e.g. in water or crude oil. It is supported by mounting tools for temporary (magnets) or permanent (welded) installation. ISAFE3 supports automatic sensor coupling test and can be used with any AE signal processor supporting 28V supply at 90 mA peak, e.g. Vallen Systeme ASIP-2/A.
>

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.
>

On Demand Webinar: Improve the Efficiency and Accuracy of Inspection Scanning

On-demand webinar on scanning technology that helps improve the efficiency and accuracy of ultrasoni
...
c inspections in oil and gas, aerospace, manufacturing and other industrial applications. The webinar features a scanning solution for multiple inspection environments, including flat and curved specimens, magnetic and nonmagnetic surfaces and raster scanning over long distances. View it today.
>

ISONIC 3510

Very Powerful Superior Performance Extremely Portable Smart Phased Array Ultrasonic Flaw Detector an
...
d Recorder with 2 Conventional UT and TOFD Channels uniquely combines PA, single- and multi-channel conventional UT, and TOFD modalities providing 100% raw data recording and imaging. Suitable for all kinds of every-day ultrasonic inspections
>

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