射线照相胶片加工程序FILM PROCESSING PROCEDURE FOR RT RADIOGRAPHS.docVIP

FILM PROCESSING PROCEDURE FOR RT RADIOGRAPHS NDE07-07 Revision 0 Date 30/04/2017 Page PAGE 2 of NUMPAGES 5 FILM PROCESSING PROCEDURE FOR RT RADIOGRAPHS 3 2 1 0 REVISION PREPARED BY REVIEWED BY APPROVED BY AI 1 Scope 1.1This procedure is compliance with the requirements of ASME Boiler and Pressure Vessel Code Section Ⅴ. 1.2 This procedure establishes the process for controlling the film processing to produce a satisfactory radiograph. 2 Qualifications of Examination Personnel Any persons engaged in this examination shall be qualified as radiographic examiner in accordance with the Written Practice for the Training, Examination and Qualification of NDE Personnel. 3 Automatic Processing Film characteristics must be compatible with processing conditions. It is essential that the recommendations of the film processor and chemical manufacturers be followed. 4 Manual Processing 4.1 Film and chemical manufacturers should be consulted for detailed recommendations on manual film processing. 4.2 Preparation No more film should be processed than can be accommodated with a minimum separation of 20mm. Hangers are loaded and solutions stirred before starting development. 4.3 Start of Development Start the timer and place the films into the developer tank. Sep a rate to a minimum distances of 20mm and agitate in two directions for about 15 s. 4.4 Development Normal development is 5 to 8 min. at 68 °F (20 ℃). The manufacturers recommendation should be followed in choosing　a 4.5 Agitation Shake the film horizontally and vertically, ideally for a few seconds each minute during development. This will help film develop evenly. 4.6 Stop Bath or Rinse After development is complete, the activity of developer remaining in the emulsion should be neutralized by an acid stop bath or, if this is not possible, by rinsing with vigorous agitation in clear water. Follow the film manufacturer’s recommendation of stop bath composition (or length of alternative rinse), ti