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 -

4425 views
Technical Discussions
Ed T.
Ed T.
07:32 Sep-18-2005
RE: 2% or Really 4% Sensitivity

Whe using plaque type penetrameters, 2-2T is a typical IQI designation.

The first 2 refers to the IQI thickness which represents a percentage of the thickness of the part being inspected.

The 2T refers to the diameter of the hole that must be discerned.

Therefore, 2-2T indicates that the IQI thickness should be 2% of material thickness and that the required hole is 2x the IQI thickness.

What this means is that a 2-2T IQI in the radiograph is a means of verifying that the RT technique is capable of discerning a 2% loss of material and not a measure of size of disontinuity that can be located on the radiograph.

Now, the holes in plaque type penetrameters represent sharp boundaries, and small thickness changes (2%).
Flaws in the part may not have these sharp bundaries, and may not be as visible.

Therefore, the penetrameter is used to indicate quality of the radiographic technique and not intended to be used as a measure of size of discontinuity that can be located on the radiograph.

If you look at ASME, it gives you a range of thicknesses and not a 2% sensitivity requirement.



    
 
 
N.Kuppusamy
Consultant, Level-III
United Testing Co. Pte Ltd, Singapore, Joined Jan 2003, 13

N.Kuppusamy

Consultant, Level-III
United Testing Co. Pte Ltd,
Singapore,
Joined Jan 2003
13
06:30 Sep-20-2005
Re: RE: 2% or Really 4% Sensitivity
Hi friends,
2-2T and 2-4T etc are inedicating quality levels only. We can calculate Equivalent Penetrameter Sensitivity (EPS)only using mathematical formula.

Please refer to ASTM E1025-1998 Table-1 for Equivalent Penetrameter Sensitivity (EPS)and appendix for mathematical formula.
Regards,
nksamy
----------- Start Original Message -----------
: Whe using plaque type penetrameters, 2-2T is a typical IQI designation.
: The first 2 refers to the IQI thickness which represents a percentage of the thickness of the part being inspected.
: The 2T refers to the diameter of the hole that must be discerned.
: Therefore, 2-2T indicates that the IQI thickness should be 2% of material thickness and that the required hole is 2x the IQI thickness.
: What this means is that a 2-2T IQI in the radiograph is a means of verifying that the RT technique is capable of discerning a 2% loss of material and not a measure of size of disontinuity that can be located on the radiograph.
: Now, the holes in plaque type penetrameters represent sharp boundaries, and small thickness changes (2%).
: Flaws in the part may not have these sharp bundaries, and may not be as visible.
: Therefore, the penetrameter is used to indicate quality of the radiographic technique and not intended to be used as a measure of size of discontinuity that can be located on the radiograph.
: If you look at ASME, it gives you a range of thicknesses and not a 2% sensitivity requirement.
------------ End Original Message ------------




    
 
 

Product Spotlight

Aerospace Systems - Automated Ultrasonic Inspection

USL are specialists in the design and manufacture of turnkey ultrasonic inspection systems for aer
...
ospace applications. From monolithic composites to complex honeycomb structures. This video shows just a few examples of what is possible, find out more at: www.ultrasonic-sciences.co.uk
>

35 years of VOGT Ultrasonics!

This year we are celebrating a company anniversary! 35 years have passed since we first took our t
...
est device and swung the probe on behalf of safety. But our ultrasonic know-how goes back many years..
>

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
>

Spot weld inspection with Phased Array – PHAsis.one

The first PAUT spot weld inspection device offering a physical resolution of the spot weld diamete
...
r better than 0.35mm. Precise: more than 700 real UT measurements per spot weld. Easy to go: minimal training required due to the user friendly inspection software. Be sure: safe evaluation due to the imaging result display and automated creation of an evaluation proposal for the spot weld quality.
>

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
s