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PT stories

The computer and the PT process line

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Written by Administrator
Saturday, 17 August 2013 05:43

How to make a straight PT process line where there is not room enough?

Once again, a true short story.

As a PT equipment supplier, one of us answered to a call for tender for a new PT process line, planned for an extension of production capability in a major aircraft engines manufacturer.

Last Updated ( Saturday, 17 August 2013 05:53 )

A too viscous penetrant

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Written by Administrator
Friday, 12 July 2013 12:44

One of our papers(*) had some words for a PT materials manufacturer who, in the early 2000s, had designed a new generation of sensitivity Levels ½ to 4, water-based fluorescent penetrants. A challenging project.

The designer of these penetrants hoped to make a fantastic leap forward, but he had no contact with users.
He had his own ideas and he was used to getting his own way: never mind the users’ concerns!
Was he in the opinion that users had only to endorse his choices?

Last Updated ( Friday, 12 July 2013 15:46 )

Hydrophilic emulsifiers: what shall never be done, but it worked perfectly!

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Written by Administrator
Saturday, 15 June 2013 08:41

It is well known: Penetrant Testing shall be applied following the rules written in standards, codes, specifications, procedures … or after the manufacturer’s recommendations.
However, following the rules does not always allow for the detecting the flaws that should be detected.
As, when processed, an NDT is supposed to show the discontinuities it is designed to find, we could assume that the first aim of any NDT is: “Find the discontinuities!”


You are to read an example where the inspectors were unable to find cracks that they know existed.

Last Updated ( Saturday, 15 June 2013 08:53 )

How to fool users of NDT products

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Written by Administrator
Sunday, 12 May 2013 06:30

One of us, in 1973, designed a very efficient, halogen-free solvent for degreasing prior to penetrant application. It may also be used for many other applications.
This degreaser met an impressive success in the French nuclear industry, thanks to its unique properties.

Last Updated ( Sunday, 12 May 2013 06:44 )
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