ASTM E1032:19 pdf download

ASTM E1032:2019 pdf download.Standard Practice for Radiographic Examination of Weldments Using Industrial X-Ray Film.
8.4 Direction of the Radiation—Direct the central beam of radiation perpendicularly toward the center of the effective area of the film or to a plane tangent to the center of the film, to the maximum extent possible. except for double-wall exposure double-wall viewing elliptical-projection techniques, as described in 8.14.2.
8.5 Back-Scattered Radiation Pivtection:
8.5.1 Back-scattered radiation (radiation reflected from surfaces behind the film (that is, walls, floors, etc.)) serves to reduce radiographic contrast and may produce undesirable effects on radiographic quality. A ½-in. [3.18 mm] lead sheet, placed behind the film, generally furnishes adequate protection against back-scattered radiation.
8.5.2 To detect hack-scattered radiation, position a lead letter B (approximately ½ in. [3. 1 mm] thick by ½ in.
112.7 mm] high) on the rear side of the film holder. If a light image of the lead letter B appears on the radiograph, it indicates that more back-scatter protection is necessary. The appearance of a dark image of the lead letter B should be disregarded, unless the dark image could mask or be confused with rejectable weld defects.
.6 IQI Selecr,on—The thickness on which the IQI is based is the single-wall thickness plus actual reinforcement thickness up to the maximum allowed. Backing strips or rings are not considered as part of the weld or reinforcement thickness in IQI selection. For any thickness, a thinner IQI may be used, provided all other requirements for radiography are met. Reference 7.4 for quality levels and IQI selection.
8.7 IQI Placement:
8.7. 1 Hole-Type iQis:
.7.l.I Place the IQIs on the source side adjacent to the weld being radiographed. Where the weld metal is not radio- graphically similar to the base material or where geometry precludes placement, the IQI may be placed over the weld.
8.7.1.2 Side IQI—ln those cases where the physical placement of the IQI on the source side is not possible, the IQI may be placed on the film side. The applicable job order or contract shall specify the applicable film-side quality level. Place a lead letter F adjacent to the IQI for identification.
8.7.2 Wire IQIs:
8.7.2.1 Place the wires on the source side of the weld being radiographed, approximately 900 to the weld bead.
8.7.2.2 In those cases where the physical placement of the IQI on the source side is not possible, the IQI may be placed on the film side. The applicable job order or contract shall specify the applicable film-side quality level. Place a lead letter F adjacent to the IQI for identification.
8.8 Separate Block—When configuration or size prevents placing the IQI on the object being radiographed, a shim or separate block or like section conforming to the requirements of 6.7 may he used, provided the following conditions are met:
8.8. 1 The IQI shall be no closer to the film than the source side of the object being radiographed (unless otherwise specified).
8.8.2 The optical density measured (1) through the body of the IQI on the shim, separate block.