BS EN ISO 10042:2018 pdf download – Welding — Arc-welded joints in aluminium and its alloys — Quality levels for imperfections This document specifies quality levels for imperfections in arc-welded joints in aluminium and its alloys. It applies to material thicknesses above 0,5 mm. Three quality levels are given in order to permit application to a wide range of welded constructions. They are designated by symbols B, C and D. Quality level B corresponds to the highest requirement on the finished weld. The quality levels refer to production quality and not to the fitness for purpose (see 3.2) of the product manufactured. This document is applicable to all types of welds (e.g. butt welds, fillet welds and branch connections),to manual, mechanized and automated welding, and to all welding positions. It is applicable to the following welding processes: — metal inert gas welding (MIG welding); gas metal arc welding /USA; — tungsten inert gas welding (TIG welding); gas tungsten arc welding /USA; — plasma arc welding. It is not applicable to metallurgical aspects (e.g. grain size, hardness). 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. Forundated references, the latest edition of the referenced document (including any amendments) applies. ISO 6520-1, Welding and allied processes — Classification of geometric imperfections in metallicmaterials — Part 1: Fusion welding 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https://www.iso.org/obp — IEC Electropedia: available at http://www.electropedia.org/ 3.1 quality level description of the quality of a weld on the basis of type, size and amount of selected imperfections 3.2 fitness for purpose ability of a product, process or service to serve a defined purpose under specific conditions 3.3 short imperfection <welds of length ≥100 mm> imperfection whose total length is not greater than 25 mm in any 100 mmof their length 3.4 short imperfection <welds less than 100 mm long> imperfection whose total length is not greater than 25 % of thelength of the weld 3.5 systematic imperfection imperfection that is repeatedly distributed in the weld over the weld length to be examined, the size ofeach individual imperfection being within...
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