BS EN 12517-1:2006 – Non-destructive testing of welds — Part 1: Evaluation of welded joints in steel, nickel, titanium and their alloys by radiography — Acceptance levels

1 Scope
This document specifies acceptance levels for indications from imperfections in butt welds of steel, nickel, titanium and their alloys detected by radiographic testing. If agreed, the acceptance levels may be applied to other types of welds or materials.
The acceptance levels may be related to welding standards, application standards, specifications or codes. This European Standard assumes that the radiographic testing has been carried out in accordance with EN 1 435.
When assessing whether a weld meets the requirements specified for a weld quality level, the sizes of imperfections permitted by standards are compared with the dimensions of indications revealed by a radiograph made of the weld.
2 Normative references
The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1 435, Non-destructive examination of welds — Radiographic examination of welded joints
EN ISO 581 7, Welding — Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) — Quality levels for imperfections (ISO 5817:2003)
EN ISO 6520-1 , Welding and allied processes — Classification of geometric imperfections in metallic materials — Part 1: Fusion welding (ISO 6520-1:1998)
3 Radiographic technique
Depending on the weld quality level, radiographic technique A or B in accordance with EN 1 435 is used as shown in Table 1 .
4 General
Welded joints should be visually tested and evaluated in accordance with EN 970 before radiographic testing. The acceptance levels in this European Standard are basically valid for evaluation of imperfections which cannot be detected and evaluated by visual testing. Surface imperfections (such as undercut and excessive penetration, surface damage, weld spatter etc.) which, due to object geometry, cannot be evaluated, but where the interpreter suspects the EN ISO 581 7 quality levels are not fulfilled, shall be subject to more specific testing. When quantification of undercut and/or excessive penetration by radiographic testing is required, specific procedures using test exposures may be applied in order to establish a basis for approximate quantification in accordance with the requirements of EN ISO 581 7. This shall be specified.
5 Acceptance levels
The acceptance levels for indications are shown in Table 2 and Table 3. The types of imperfections are selected from EN ISO 581 7 and defined in EN ISO 6520-1 .
BS EN 12517-1:2006 – Non-destructive testing of welds — Part 1: Evaluation of welded joints in steel, nickel, titanium and their alloys by radiography — Acceptance levels