Penetrant Inspection

What about inspecting equipment used in food preparation?

Met-L-Chek has customers who are in the business of processing food, including many dairies. These customers are regular users of penetrants in the maintenance of their processing equipment. Yet we frequently get questions from others who process food as to whether we have penetrant products that are approved for use...

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People Who Really Work at NDT

This issue of the Penetrant Professor is slightly different than earlier issues. Taking a lead from ASNT’s publication “The NDT Technician” and it’s feature “Practitioner Profile”, the professor thought it would be of interest to share an e-mail received from some one who is very into his profession of NDT...

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Pesky Penetrant Contaminants

Pesky Penetrant Contaminants Although the major components of penetrant inspection products usually cause no problems with the metals with which they contact when used correctly, there are some minor contaminants that can cause problems and which must be limited in certain applications. The  governing specification, SAE AMS 2644E, has taken...

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The Penetrant Process – Iowa State University

Iowa State University has done some work regarding penetrant testing. Individual topics on their work have been presented before, but this time it was all put together. We want to list some of the highlights of their work and to refer you to the places where you can look at...

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Engine Crankshaft Inspection, circa 2005

THE ENGINE CONUNDRUM Last month, we related the story of the person who wanted to inspect a crankshaft for cracks, but who didn’t want to disassemble the engine. The question that was posed was whether the penetrant could be applied to the outside of the engine to locate a flaw...

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Low/High Temperature and Penetrants

This subject was discussed in our 2nd anniversary issue of the Penetrant Professor in 1995. Funny how time flies but the questions remain the same. Every penetrant manufacturer is asked about what temperature their penetrant should be used at. In the case of Met-L-Chek penetrants, the label on the aerosol...

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Known Defect Test Piece part 2

Known Defect Test Piece Part Deux In the March 2016 Penetrant Professor we discussed known defect standards for penetrant inspection and introduced a new star burst type panel, the Hoffman Panel. We commented that this panel at that time had not been officially approved to the Pratt & Whitney TAM...

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What One Needs to Know to Perform a Quality Penetrant Inspection!

One of the services that Met-LChek provides to the NDT community is the writing, updating and editing of the various specifications and procedures related to penetrant inspection. This includes the ASNT Penetrant Handbook, which is presently undergoing updating. While reviewing the text that has been proposed, we were struck by...

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