ISO 6520-1 PDF - Definitions: Imperfection Any deviation from the ideal weld. Defect An unacceptable imperfection. BS EN ISO standard classifies the geometric . Welding Imperfections according to BS EN ISO 6520-1. Fusion-welded joints in steel, nickel, titanium and their alloys beam welding excluded. Take the smart route to manage medical BS EN ISO 6520-2:2013 Welding and allied processes. Classification of geometric imperfections in metallic materials In order to read a Secure PDF, you will need to install the FileOpen Plug-In on your computer. The FileOpen Plug-In works with Adobe Reader and other viewers. Visit FileOpen to see the full list. What you can do with a Secure DIN EN ISO 6520-1:2007-11. Identical. 12/30241229 DC : 0. BS 7910 - GUIDE TO METHODS FOR ASSESSING THE ACCEPTABILITY OF FLAWS IN METALLIC STRUCTURES. BS PD6705-3 (2009) : 2009. STRUCTURAL USE OF STEEL AND ALUMINIUM - PART 3: RECOMMENDATIONS FOR THE EXECUTION OF ALUMINIUM STRUCTURES TO BS EN 1090-3. 04/30111613 DC : DRAFT OCT 2004.