Rad NDT exposure time

mariolucas75 · Apr 20, 2025

Dear Forum,

Please help me to find an explicit formula to calculate the time for RT exposure (NDT of piping).
I want to build that formula in excel. There is a tool for example "RT toolkit" for android, however i want an explicit formula and table of parameters that go in that formula - whatever constants are applicable depending the source or film density... searched all over the web and still struggle.

Best Regards and thank you so much.

EdStainless · Apr 20, 2025

In the Level III RT class then you learned how to calculate this.
Why is non-NDT professional worried about this at all?

mariolucas75 · Monday at 6:35 AM

EdStainless said:
In the Level III RT class then you learned how to calculate this.
Why is non-NDT professional worried about this at all?

Hi EdStainless ... i would like to have a basic understanding in the fields that I directly or indirectly encounter.
Somebody tells me we need whatever hours to shoot this and i would like to learn why and how....

I also do remember your very educative responses to my posts / questions previously - thank you once again for that.

Best Regards

DekDee · Monday at 9:09 AM

mariolucas,
Go to www.ndt.net and then "Forum" and ask your question.
Much better chance of getting the info you require,
Cheers,
Shane

JR97 · Tuesday at 4:54 PM

mariolucas75 said:
Somebody tells me we need whatever hours to shoot this and i would like to learn why and how...

The Exposure time is only one part of the time necessary to perform the inspection. The bulk of the time is set-up and tear down of radiation barriers, joint layout, film exposure, re-shots, etc.

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Rad NDT exposure time

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