BS EN 12681-1:2017

European foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Classification of radiographic techniques
6 General preparations and requirements
7 Test arrangements
8 Choice of tube voltage and radiation source
9 Film systems and metal screens
10 Reduction of scattered radiation
11 Source-to-object distance
12 Optical density D of radiograph
13 Film processing and viewing
14 Techniques for increasing the
   covered thickness range
15 Requirements on radiographs
16 Verification of image quality
17 Influence of crystalline structure
18 Acceptance criteria
19 Test report
Annex A (normative) - Minimum image
        quality values
Annex B (normative) - Severity levels for
        steel castings
Annex C (normative) - Severity levels for
        cast iron castings
Annex D (normative) - Severity levels for
        aluminium alloy and magnesium alloy castings
Annex E (normative) - Severity levels for
        copper alloy castings
Annex F (normative) - Severity levels for
        titanium and titanium alloy castings
Annex G (informative) - Significant technical
        changes between this European Standard and
        the previous edition
Bibliography

Describes specific procedures for industrial X-ray and gamma radiography for discontinuity detection purposes, using NDT (Non-destructive testing) film techniques.

This European Standard gives specific procedures for industrial X-ray and gamma radiography for discontinuity detection purposes, using NDT (Non-destructive testing) film techniques. This part of EN 12681 specifies the requirements for film radiographic testing of castings. Films after exposure and processing become radiographs with different area of optical density. Radiographs are viewed and evaluated using industrial radiographic illuminators. This part of EN 12681 specifies the recommended procedure for the choice of operating conditions and radiographic practice. These procedures are applicable to castings produced by any casting process, especially for steel, cast iron, aluminium, cobalt, copper, magnesium, nickel, titanium, zinc and any alloys of them. NOTE This European Standard considers EN ISO 5579. This part of this European Standard does not apply to: - radiographic testing of castings for aerospace applications (see prEN 2002-21); - radiographic testing of welded joints (see EN ISO 17636-1); - radiography with digital detectors (see EN 12681-2); - radioscopic testing (see EN 13068, all parts).