BS EN 2002-21:2019 pdf free.Aerospace series – Metallic materials – Test methods.
4 Health and safety Resources, test pieces, test samples, test materials, test equipment and test procedures shall comply with
the current health and safety regulations/ laws of the countries where the test is carried out. Where equipment, materials and/or reagents which may be hazardous to health are specified, appropriate precautions in conformity with local regulations/laws shall be taken. Particular attention shall be paid to the health and safety requirements applicable to ionising radiation (Y and X- ray). 5 Principle The method requires the use of X- or gamma-radiography for the detection of discontinuities, using film or real-time techniques, applicable to the testing of metallic materials. See EN ISO 5579. 6 Testing requirements 6.1 Resources The resources shall be appropriate for fixed installation or portable system used on-site.6.1.1 Equipment/plant The following equipment is needed: a) X-ray source[s) and Gamma-ray source[s) with performance parameters appropriate to the material thickness and geometry of the objects to be tested; b) image quality indicators according to EN ISO 19232-1 or EN ISO 19232-2; c) a film processing system; . d) a film density measuring according to EN 444; e) a suitable viewing room with appropriate control of illumination; f) a viewing screen with luminance according to EN 25580 and capable of masking the area of interest; g) radiation monitors calibrated in accordance with national standards; h) a radiation hazard warning system; i) a Gamma-ray source storage facility; j) a building or room with suitable radiation shielding. For real-time radiographic systems: k) a means of remote manipulation;l) electronic viewing/ recording means; m) software; n) image enhancement and assessment tools. 6.1.2 Materials/reagents The following material is required: a) industrial radiographic films according to EN ISO 11699-1; b) film processing chemicals; c) electronic recording means. 6.1.3 Qualification of personnel Testing to the requirements of this document shall only be performed and/or supervised by NDT personnel, qualified and approved in accordance with the requirements of EN 4179. 6.2 Test samples The test sample shall be the casting; or group of castings as specified by the test procedure.BS EN 2002-21 pdf download.