NDT
NDT
(OP)
Dear all,
I am told that there is some RT technique using dual films which let us use
IR 192 source instead of CO60.
Please give me information, about the time de exposure source it's same of one film?
Kind regards.
Magalhães Julio
I am told that there is some RT technique using dual films which let us use
IR 192 source instead of CO60.
Please give me information, about the time de exposure source it's same of one film?
Kind regards.
Magalhães Julio





RE: NDT
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"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year
RE: NDT
RE: NDT
Multiple films is normaly used when you want to cover big difference in the wall thicknes. e.g. you have a part with 10 mm wall thickness next to 20 mm wall thickness. The you can use 2 different type of films to test the whole part with one shot.
RE: NDT
Iridium, Cobalt, X-Ray each has its strong and weak aspects for a given application. To quote Chief Engineer Montgomery Scott "you need to use the right tool for the right job".
RE: NDT
The original poster isn't asking about combining Ir with Co. He's referring to the practice of using multiple films in a single exposure, in this case using Ir. Individually, the film density is < 2, but viewed compositely, the density will be in the range required by Code. It's also possible to do so with Co but in this case I believe the goal is to avoid using Co.
RE: NDT
Thin areas are read using the slow film, or slow plus medium. Thick areas are read with the fast film, etc. Only applicable for RT's with widely varying thickness in the shot.