Digital Rx could be an option for your case %E2%80%9CJust as with any conventional X-ray, the inspected item is placed between the X-ray source and the imager, which in this case is an a-Si digital flat panel detector. The X-ray source is fired, energizing the digital flat panel detector. Once the image is captured and read out, it is immediately displayed on the computer monitor, and ready for a wide range of image enhancements, extreme zooms (up to 800 percent) and Window levelling, to make full use of the wide dynamic range presented by this technology.%E2%80%9D An advantage with this method is that we don%E2%80™t need to uninsulate lines the other advantage is that the a-Si flat panel detector imager can withstand several shoots and the obtained image can be stored and treated through a computer software programme.

We have done some lot of checks with digital radiography thickness measurements in lines up to 6%E2%80%9D diameter with very accurate results. For a 24%E2%80%9D diameter line it can poses some limitations because of the dimension of the digital flat panel detector. The work can be done either with gamma ray. Any way, with traditional radiography/gammagraphy you can have some good indications results about your tube wear. In this case you have to put your radiation fount on the diameter direction of the pipe, as long as possible from it to get the less divergence. You put your Rx film in a flat position normal to your fount and touching the pipe insulation. Your exposition time will be dependent on your curies isotope number and the distance of it from the Rx film. I suppose Profile radiography can only be done up to 18%E2%80%9D. Get an advice from your local NDT operator I am sure he will help you. luis