![Which type of radiographic film should I select?](/sites/bakerhughes/files/styles/small_2_1_768x380_/public/2023-08/headerimage_general_0.png?h=a141e9ea&itok=0g1s9WQS)
Which type of radiographic film should I select?
Which type of radiographic film should I select?
Most procedures and codes of good practice for the performance of industrial radiography base the choice of type of film for a specific application on the EN or ASTM classification systems. For weld inspection, when one is attempting to detect small cracks, a film of class C2 or C3 would be specified. For the examination of castings or general radiography a film of class C4 or C5 would normally be used. For small component inspection, where the image might be viewed under magnification to reveal small details, a film of class C2 or possibly even a single emulsion film of class C1 would be desirable.
In megavoltage radiography, because most equipment have a very high radiation output, class C3 films can be used for objects of great wall thickness. This has the advantage that a high film gradient can be achieved.