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DPCNews 039 - White light VS Visible light / PT in 2060/ The auditor and the units
October 2011
Our redesigned monthly DPCNewsletter draws your attention on the papers published on this Website at the same time, or reminds you of some papers already published (all of them are still available!) on the same topics as those dealt with in the new papers.
The URL address of our Website is:
http://www.ressuage-magnetoscopie-penetranttesting-magnetictesting-dpc.info
We recommend you put it in your “Favorites” list.
Underneath, find the list of the new papers that you can read this month on our Website:
In the "Edito" section
White light VS Visible light
Once again, we have to draw our readers’ attention to some terms used in documents, meetings, conferences, training documents, etc.
This month, the topic is "white light" versus "visible light", terms that, although they mean different things, are often used one for the other.
In the "NEWS" section
Penetrant Testing in 2060
Penetrant Testing is by large the most widely used NDT method, and many are the NDT suppliers of other methods ready to step onto this turf! Even ready to replace it with Ultrasonic Testing (UT) or Eddy Current Testing (ET). Nevertheless, PT is still valid, valiant, invaluable and irreplaceable.
In this paper, we explain why. Please spare some minutes to have a look at it.
Paper presented under the title ‘‘Penetrant Testing and year 2060’’ at the 10th European Conference on Non-Destructive Testing, June 7-11, 2010, Moscow (Federation of Russia).
In the "Oldies but goodies" section
The auditor and the units
Do our American friends have a feeling against SI units (units used in the Système International, the International System of units)?
We could think so, when we read the American specifications ... and when we see how sometimes they "understand" the powers of 10. They are prone to use a capital M for "micro" (10-6) when in the SI a capital M comes for "mega" (106). That means a trillion times (1012) less or more!!!
This mini-story is about the kinematic viscosity.
In the "Mail inbox" section
After reading our Editorial of April 2011 ...
... titled Capillary pressure and its surprising consequences on PT indications, some readers sent us acknowledgments for our help as this paper helped them to answer remarks by auditors.
We, Pierre CHEMIN and Patrick DUBOSC, welcome any comment, any idea. If you have some examples you would like to see discussed here, please give us all the useful indications. If you require confidentially, we would modify locations, names and some parameters to prevent any traceability.
Nevertheless, we are convinced that our site may be a kind of surge-valve: the topic is NOT to target this company, or that auditor; but it is always to make users think, to make them ask themselves, or others, the right questions.
We may also give advice, once again on a confidential basis if needed: please, feel free to ask questions, to document our data basis: about Material Safety Data Sheets (MSDS), about environment, a chemical name you don't understand, a Penetrant process you have heard about, etc.
We have plenty of examples, some being out of all the specifications/standards, which led to the discontinuities detection, when the "current, normal, processes" prevented discontinuity finding.