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 -
Technical Discussions
Nirav Dave
NDT Inspector,
Company, India, Joined Jul 2014, 11

Nirav Dave

NDT Inspector,
Joined Jul 2014
11:36 Nov-15-2014
NDE Equipmet


I am looking for a UT immersion test system for stainless steel seamless pipes. in conventional immersion generally A-Scan display along with UT charts are covered. now new UT system provide C-Scan facility and A-Scan display for a certain period of time.

i want to know weather ASME code accept C-scan display ?in which form UT charts shall appear? is it acceptable B-Scan or C-Scan for pipe / tube testing?

Plz advice.


Godfrey Hands
PRI Nadcap, United Kingdom, Joined Nov 1998, 304

Godfrey Hands

PRI Nadcap,
United Kingdom,
Joined Nov 1998
08:39 Nov-17-2014
Re: NDE Equipmet
In Reply to Nirav Dave at 11:36 Nov-15-2014 (Opening).

Hi Nirav,

There are different equipment options available from many different manufacturers. These range from the very simple to fully automated.
The very simplest set-up is to rotate a tube in a helix past a 45 degree angle contact probe with water dripped in to the contact area to detect longitudinal defects. This only looks in one direction, so adding a second probe looking the other way increases this to bi-directional.

Next up in performance is to use immersion probes, again with the tube being rotated in a helix. The machine can incorporate several probes to provide detection of longitudinal and circumferential defects as well as wall thickness. This set-upp is generally used in small to large diameter tubes (15mm and larger).

Next comes the rotating probe set-up, which has a similar set-up to last one above, but tends to test faster and on smaller diameters (up to about 25mm diameter).

It is not normal to use any of these with C-Scan, but chart recording, usually with one chart for each probe provide all the information which you will need.
C-Scan is unlikely to provide much more information than chart recording for smaller diameter tubes.
It may also not provide much benefit recording B-Scan, especially on smaller wall thicknesses.

Also in reply to your other enquiry about ROTA, I agree with Ed Ginzel. For detection of Longitudinal defects, it is best if you initially use a fixed offset from perpendicular, related to the tube diameter. Simple geometry will show you the correct offset to use.
This is valid for rotating tubes as well as rotating heads

Godfrey Hands


Product Spotlight

Semi-Automated Phased Array Immersion System for Small Composite Parts

Turn-key semi-automated system as an improved and affordable solution for inspection of small comp
osite parts. Includes support table, immersion tank, scanner, PA instrument, PC, Analysis software, database, wedge management and other options.

Lyft™: Pulsed Eddy Current Reinvented

PEC Reinvented—CUI Programs Redefined Corrosion under insulation (CUI) is possibly the greatest u
nresolved asset integrity problem in the industry. Current methods for measuring wall thickness with liftoff, without removing insulation, all have severe limitations. Eddyfi introduces Lyft — a reinvented, high-performance pulsed eddy current (PEC) solution. The patent- pending system features a state-of-the-art portable instrument, real- time C-scan imaging, fast data acquisition with grid-mapping and dynamic scanning modes, and flexibility with long cables. It can also scan through thick metal and insulation, as well as aluminum, stainless steel, and galvanized steel weather jackets. Who else but Eddyfi to reinvent an eddy current technique and redefine CUI programs. Got Lyft?


Teledyne ICM’s CPSERIES has been designed with a view to revolutionizing the handling and perfor
mances of portable X-Ray sets. Despite having managed to halve the weight of similar portable X-Ray generators available on the market (while continuing to provide the same power output), the SITEX CPSERIES generators feature a shutter, a laser pointer, a beryllium window, an aluminum filter and two integrated diaphragms (customized sizes are available upon request). Without compromising the robustness and reliability for which ICM products are renowned, the small size and light weight of the SITEX CPSERIES will radically change the way that you perform your RT inspections. And you will see a positive impact in terms of both quality and return on investment (ROI).

Research and Applications Development For NDT

The Research and Applications Development (RAD) group is a newly formed team within Acuren dedicat
ed to tackling challenging inspection problems. Our focus is the development of novel, field deployable, advanced inspection techniques for use in cases where standard NDT methods are ineffective. We don't wait for new innovations, we engineer them. From concept to commissioning.

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