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Technical Discussions
Marius Purcell
Engineering, Nondestructive Testing Level III
Sasol (Pty) Ltd. SA Ops., South Africa, Joined Jul 2018, 12

Marius Purcell

Engineering, Nondestructive Testing Level III
Sasol (Pty) Ltd. SA Ops.,
South Africa,
Joined Jul 2018
12
15:13 Jul-02-2020
Nondestructive Examination or Nondestructive Testing

This topic probably dates back a few decades and is still finding its place around the tables of technical boards governing engineering, design and integrity, including certification authorities. The latter can be stressed most with regards to the practicing sector either newly manufactured components or in-service assessments.

I don't tend to pose a popularity poll with regards to the terms highlighted above but I can see there is a regional trend on how the terms are being applied in written form, either published articles within renowned journals, MEng. research articles and product developers alike across the globe.

ASME refers to this concept as being NDE - nondestructive examination, ASTM E1316 makes use of the term NDT including EN 1330-1 and the relevant NDT standards (the list is too congested to avail it in this post).

The initial notion will be that no one standardization is incorrect but what will be the most correct term be with a suitable explanation thereto?

Your help will be appreciated.

Regards,

Purcell, M

 
 Reply 
 
Gerald R. Reams
Engineering,
Industry, USA, Joined Aug 2012, 182

Gerald R. Reams

Engineering,
Industry,
USA,
Joined Aug 2012
182
17:02 Jul-02-2020
Re: Nondestructive Examination or Nondestructive Testing
In Reply to Marius Purcell at 15:13 Jul-02-2020 (Opening).

With over 40 years of involvement in this industry my experience has been that the basic term defining this industry is NONDESTRUCTIVE. The terms examination, evaluation, testing, inspection, etc., are further descriptors specific to various industries, codes, standards, specifications, countries, etc. So, what is the correct term? It depends.

Gerald

 
 Reply 
 
Anmol Birring
Consultant,
Birring NDE Center, Inc., USA, Joined Aug 2011, 832

Anmol Birring

Consultant,
Birring NDE Center, Inc.,
USA,
Joined Aug 2011
832
22:03 Jul-02-2020
Re: Nondestructive Examination or Nondestructive Testing
In Reply to Marius Purcell at 15:13 Jul-02-2020 (Opening).

Since most methods are named with “testing” such as Ultrasonic Testing, eddy current testing, radiographic testing, the more solid term is nondestructuctive testing.

 
 Reply 
 
Aleg
Aleg
10:42 Jul-03-2020
Re: Nondestructive Examination or Nondestructive Testing
In Reply to Gerald R. Reams at 17:02 Jul-02-2020 .

It is interesting, that even in ISO standards for the same method are used different terms.

ISO 11971:2008 „Steel and iron castings -- Visual examination (!) of surface quality”.
ISO 11971:2020 „Steel and iron castings -- Visual testing (!) of surface quality”.
ISO 3058:1998 „Non-destructive testing -- Aids to visual inspection (!) -- Selection of low-power magnifiers”.

In a article (I do not have a link) about NDT I read, that it is recommended (for mutual understanding) to use "testing" when you change initial condition of item in interest. Examples:
MT: adding of paint+suspension+magnetising;
UT: adding of couplant;
PT:adding of penetrant+cleaner+developer).

In the article was written, that the term "inspection" is recommended to use when you do not change initial condition of item in interest. Example: visual inspection.

About RT I am not sure, which term it is better to use accordind to criteria given in the article: "testing" or "inspection".

 
 Reply 
 
Udo Schlengermann
Consultant, -
Standards Consulting, Germany, Joined Nov 1998, 183

Udo Schlengermann

Consultant, -
Standards Consulting,
Germany,
Joined Nov 1998
183
14:28 Jul-03-2020
Re: Nondestructive Examination or Nondestructive Testing
In Reply to Marius Purcell at 15:13 Jul-02-2020 (Opening).

Dear collegues,
this is a problem linked to the variations of the English language in different parts of the world.
But languages are living and changing, i.e. such a problem of writing and meaning of terms cannot be solved in general.
Examples: In the United Kingdom all terms are used (but always with hypen: non-destructive testing, magnetic-particle inspection, in-service inspection).
In North America all terms are used „nondestructive testing“, „nondestructive examination“, „nondestructive inspection“ (always without hyphen).
Independent organisations can define the writing, e.g. ASTM by „nondestructive testing“, but ASME by „nondestructive examination“.
Only in the field of European (EN) and International Standards (ISO), there is a clear definition (with British English) by agreement between CEN and ISO.
Their technical committees are all named NDT:
ISO/TC 135 – Non-destructive testing;
CEN/TC 138 – Non-destructive testing.
There, all different NDT methods are called and abbreviated using „testing“, e.g. ET, RT, UT.
In these standards combined terms in the field of NDT use always the term „test“, e.g. test equipment, test procedure, test report.
But very often for standard applications text from society or company specifications is copied into the draft proposal for a new standard without obeying the actual standardization rules for structure and terminology of a standard.
Or old standards are confirmed without checking for new rules.

It should be noted, that within the European Union and the European Free-Trade Association all member countries by law are obliged to implement European Standards into their national standards system.
For ISO Standards such a mandatory rule does not exist.

To summarize: Test objects are tested non-destructively.
Only non-destructive testing personnel is examined.

With best regards

 
 Reply 
 
Ricardo Andreucci
FATEC - Technological University of Sao Paulo, Brazil, Joined May 2018, 38

Ricardo Andreucci

FATEC - Technological University of Sao Paulo,
Brazil,
Joined May 2018
38
13:10 Jul-06-2020
Re: Nondestructive Examination or Nondestructive Testing
In Reply to Marius Purcell at 15:13 Jul-02-2020 (Opening).

Dear colleagues
In my opinion, most standards and codes agree with Mr. Birring's comment above. However, the ASME code makes a difference between test and exam. For example: Hydrostatic test, radiographic examination. I believe it is a particular terminology of the ASME Code. Anyway, we all know what needs to be done.

 
 Reply 
 
Barry Drogin
Director,
SUPERSTRUCTURES Engineers+Architects, USA, Joined Jan 2016, 5

Barry Drogin

Director,
SUPERSTRUCTURES Engineers+Architects,
USA,
Joined Jan 2016
5
18:00 Jul-06-2020
Re: Nondestructive Examination or Nondestructive Testing
In Reply to Marius Purcell at 15:13 Jul-02-2020 (Opening).

Not to disagree with ASME, but NDE is used to mean "nondestructive evaluation" about four times as often as "nondestructive examination" (using Google search). Evaluation is meant to mean additional engineering interpretation beyond testing, examination, and inspection. My title is Director, Non-Destructive Testing & Evaluation, and we use "NDT&E" often. Our technicians are NDT Technicians. I'm just surprised it has not been mentioned. NDT is by far the most common term (using Google search).

 
 Reply 
 
Laurent
France, Joined Nov 2018, 4

Laurent

France,
Joined Nov 2018
4
10:59 Jul-07-2020
Re: Nondestructive Examination or Nondestructive Testing
In Reply to Barry Drogin at 18:00 Jul-06-2020 .

Hi
I do agree
It's particularly true in french nuclear plant. Even if the traduction is not similar the approach can be:
NDT = new construction
NDE = evolution of defect in existing construction

 
 Reply 
 

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