AS ISO 4993-2020 pdf download

AS ISO 4993-2020 pdf download.Steel and iron castings一 Radiographic testing. If requirements are imposed for which there is not an accepted International Standard or other standard available, a detailed specification of such requirements shall be provided. Castings with a complex geometry might include areas which cannot be radiographically inspected or can only be partly inspected. Such areas shall be identified before starting the radiographic examination. Areas which cannot be radiographically inspected shall be noted by all contracting parties and be marked on the film position plan. 5 General 5.1 Protection against ionizing radiation Local, national, or international safety precautions shall be applied when using ionizing radiation. WARNING — Exposure of any part of the human body to X-rays or gamma-rays can be highly harmful to health. 5.2 General requirements This International Standard shall be used in combination with ISO 5579. 6 Testing parameters Unless otherwise requested in the enquiry and order, the radiographic testing may be performed at any point in the manufacturing cycle, before or after the final heat-treatment. The surface shall be conditioned, if necessary, so that surface irregularities cannot mask or be confused with discontinuities. Any type of penetrameter or image quality indicator may be used, provided that the sensitivity level indicated by the purchaser is achieved. The following items shall be agreed upon between contracting parties: a) manufacturing stage; b) extent of examination; c) examination areas; d) surface condition; e) test class according to ISO 5579 (it is recommended that the examination be performed in accordance with ISO 5579); f) information about the film position plan; g) marking of examination areas on the casting; h) image quality value, in accordance with ISO 19232; i) marking of the films; j) acceptance criteria. Any additional items shall be agreed upon between the contracting parties. Radiographs shall be evaluated by comparison to reference radiographs.AS ISO 4993 pdf download.