3 h u 1 mm 03 a but max 4 mm h u 05 mm 02 a but max 3 mm h u 05 mm 01 a but max

3 h u 1 mm 03 a but max 4 mm h u 05 mm 02 a but max 3

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3 h u 1 mm + 0,3 a , but max. 4 mm h u 0,5 mm + 0,2 a , but max. 3 mm h u 0,5 mm + 0,1 a , but max. 2 mm 4 Multiple imperfections 0,5 to 3 Not permitted Not permitted Not permitted 4.1 None Multiple imperfections in any cross section 1 2 3 4 5 h h h h h h 3 Maximum total height of imperfections h u 0,4 t or u 0,25 a Maximum total height of imperfections h u 0,3 t or u 0,2 a Maximum total height of imperfections h u 0,2 t or u 0,15 a 19 EN ISO 5817:2007 Licensed copy:PONTYPRIDD COLLEGE, 12/01/2008, Uncontrolled Copy, © BSI
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Table 1 ( continued ) Limits for imperfections for quality levels No. Reference to ISO 6520-1:1998 Imperfection designation Remarks t mm D C B 4.1 1 2 3 4 5 h h h h h h 4.2 None Projected or cross-sectional area in longitudinal direction case 1 ( D l 3 ) 1 1 2 2 3 3 h l h l h l h l 20 EN ISO 5817:2007 Licensed copy:PONTYPRIDD COLLEGE, 12/01/2008, Uncontrolled Copy, © BSI
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Table 1 ( continued ) Limits for imperfections for quality levels No. Reference to ISO 6520-1:1998 Imperfection designation Remarks t mm D C B 4.2 case 2 ( D l 3 ) 2 3 1 1 2 2 3 3 2 h h h l h l D h l h l The sum of the areas h l shall be calculated as a percentage to the evaluation area l p w p (case 1). If D is smaller than the shorter length of one of the neighbouring imperfections, the full connection of the two imperfections shall be applied to the sum of imperfections (case 2). NOTE See also Annex A for information. W 0,5 h l u 16 % h l u 8 % h l u 4 % 21 EN ISO 5817:2007 Licensed copy:PONTYPRIDD COLLEGE, 12/01/2008, Uncontrolled Copy, © BSI
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22 Annex A (informative) Examples of determination of percentage (%) porosity Figures A.1 to A.9 give a presentation of different percentage porosities. This should assist the assessment of porosity on projected areas (radiographs) or cross-sectional areas. Figure A.1 — 1 surface percent, 15 pores, d = 1 mm Figure A.2 — 1,5 surface percent, 23 pores, d = 1 mm Figure A.3 — 2 surface percent, 30 pores, d = 1 mm Figure A.4 — 2,5 surface percent, 38 pores, d = 1 mm Figure A.5 — 3 surface percent, 45 pores, d = 1 mm EN ISO 5817:2007 Licensed copy:PONTYPRIDD COLLEGE, 12/01/2008, Uncontrolled Copy, © BSI
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23 Figure A.6 — 4 surface percent, 61 pores, d = 1 mm Figure A.7 — 5 surface percent, 76 pores, d = 1 mm Figure A.8 — 8 surface percent, 122 pores, d = 1 mm Figure A.9 — 16 surface percent, 244 pores, d = 1 mm EN ISO 5817:2007 Licensed copy:PONTYPRIDD COLLEGE, 12/01/2008, Uncontrolled Copy, © BSI
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24 Annex B (informative) Additional information and guidelines for use of this International Standard This International Standard specifies requirements for three quality levels for imperfections in welded joints of steel, nickel, titanium and their alloys for fusion welding processes (beam welding excluded) for weld thickness W 0,5 mm. It may be used, where applicable, for other fusion welding processes or weld thicknesses. Different components are very often produced for different applications, but to similar requirements. The same requirements should, however, apply to identical components produced in different workshops to ensure that work is carried out using the same criteria. The consistent application of this international Standard is one of the fundamental cornerstones of a quality management system for use in the production of welded structures.
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  • Spring '20
  • International Organization for Standardization

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