Penetrant Inspection

Blueline NDT, Queries

A New Idea Those who were at the Fall ASNT Conference and attended the Penetrant technical talks heard a presentation by Charles Mazel, of Blueline NDT. His talk discussed some new ideas about working with fluorescent magnetic particle inspection and fluorescent penetrant inspection. We all know how these inspections work....

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Qualification Documents

Time Flying and Some Perspective on Qualification Documents It is an interesting question – Is penetrant inspection a new technology or an old one? For newcomers, it probably is old. But some old timers can still remember the early days when it was an interesting and promising new inspection method....

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NAD Use with Type 1 and Type 2 Penetrants, New Aerosol Package, Electrostatic Penetrant Spray, Film Thickness & De-wetting, A Bit More About UV-A Intensity

NAD Use with Type 1 and Type 2 Penetrants We recently had a question concerning the type of developer to use with fluorescent penetrant. In this particular case, the person with the question was using both visible and fluorescent penetrants. He was using Met-L-Chek D-70 developer with the visible penetrant...

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Reprocessed Penetrant! Settled in 2005 – No Way!

REPROCESSED PENETRANT We have recently heard about a company that offers to reprocess used water washable penetrant which has failed to meet ASTM E-1417 specifications, and return it to acceptable condition. The reproces­sing is said to remove water and particulate matter. The supposed attraction of this is that the price of reconditioning...

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Behind the Scenes, Pen-Chek & Mag-Chek “Problems”

There is a body of research going on at a couple of places that has to do with penetrant inspection. At Sandia laboratories, the following question was investigated: “If a field inspector accidentally used aged penetrant materials, would that reduce the likelihood of detecting fatigue cracks?” To investigate this question,...

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False Representations of Met-L-Chek, beware of the salesman.

¿USED CAR SALESMEN? We have all heard the story of the used car salesman who alleged that the wreck that he was selling had belonged to “a little old lady from Pasadena” who only drove it on Sundays to go to church. Well, salesmen and saleswomen sometimes use rhetoric like...

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FAQ’s from Met-L-Chek users

While some, or many, of these things can get on one’s nerves, we deal with them as simply part of the business that we are in. With a business-like attitude, we dutifully reply in whatever fashion seems appropriate, sending copies of certifications, explaining what is on our web site, pointing...

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The Dilemma of How to Measure Sensitivity

The thermally cracked aluminum panel was an early method of comparing the sensitivity of one penetrant to another, and was written into the first issue of MIL-I-25135. At that time there was apparently no concept for a specific and identifiable method of quantifying absolute sensitivity, and the panel was solely...

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Reader Response: Penetrant Sensitivity – LCF crack POD panels

Words from the Wise We often remind our readers that the content of this newsletter is largely driven by our readers and the interaction that we have with them. We are pleased to relate the following comments on penetrant system sensitivity that we received from Terry Kessler, which reflect the...

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