Penetrant Inspection

Refractometers

George Orwell wrote a wonderful story entitled “Animal Farm”, in which one of the classic events was the posting of a sign that read, “All animals are equal, but some are more equal than  others.” It turns out that with regard to the testing of emulsifier strength, like in the...

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Rolls Royce RPS 702 – Approved for use materials

RPS 702 We just received a copy of Rolls-Royce specification RPS 702 that has several points worth comments as concerns materials that are approved for use. Under paragraph 2.5.1.1, certain materials listed on AMS-2644  are The Penetrant Professor now specifically listed as approved. This will make things easier for many...

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Indication Brightness

Indication Brightness In the last issue of this newsletter, we discussed the work being done at Iowa State University with regard to penetrant inspection. To  reiterate the place where you can get all of the detailed information presented at the Spring ASNT meeting, go to www.cnde.iastate.edu/faa-casr/fpi/ Once at this site,...

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FWP-931A Water Containing Penetrant is Approved

Something New and Green Met-L-Chek is pleased to announce that it has AMS-2644 approval for it’s newest penetrant FWP-931A. This is a Type 1 (fluorescent) Method A (water washable) Sensitivity Level 1 penetrant. What makes this news worthy is that this is a water based penetrant not based on petroleum...

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So, What Is This (M) and What Does It Mean??

Strangely enough we get this question frequently, concerning our post emulsified fluorescent penetrants. These are listed as follows: Level 1 sensitivity – FP-94 Level 2 sensitivity – FP-93A(M) Level 3 sensitivity – FP-95A(M) Level 4 sensitivity – FP-97A(M) This nomenclature resulted from a massive change in the qualification requirements in...

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Emulsifier Concentration

One might assume that all inspectors understand what the concentration of their hydrophilic emulsifier should be. For dip tanks, most specifications require that the concentration be maintained between 17% and 20%, and for spray application that the concentration be less than 5 %. These are verified by using a refractometer...

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Penetrant Application & Sensitivity

Penetrant Application & Sensitivity How is the best way to apply penetrant, and does the method of application have any bearing on the sensitivity of the process? This is a question that arises from time to time. It is not a question about the sensitivity of the penetrant, which is...

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The Evolution of Penetrant Specifications

A Few More Thoughts On The Evolution of Penetrant Specifications The past two issues of the PENETRANT PROFESSOR have concentrated on the historical path of the relevant qualifying documents and the journey to develop a method of measuring absolute sensitivity. While these have been extremely important in the creation of...

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