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AWS D18.3/D18.3M:2015 pdf free download

AWS D18.3/D18.3M:2015 pdf free download.Specification for Welding of Tanks, Vessels, and Other Equipment in Sanitary (Hygienic) Applications.
5.2.2 Forming equipment that makes contact with the workpiece surface, such as bending dies and rolls should be free of dirt, burrs, and other foreign materials that might become embedded in the workpiece surface,
5.2.3 Prior to welding. each side .f the weld joint should be cleaned and free of dirt, visible oxides, oil, and grease.
6. Visual Examination Requirements
6.1 Extent of Examination. Examination ot hoth pr nished and postflnished welds ma’ he required tor equipment approval
6.1.1 Welders and welding operators shall examine each weld they make and verify that the weld meets the criteria in
6.2 prior to any weld finishing. Supervisors or quality control/assurance rsonnel shall examine a representative portion of each welder’s and welding operator’s production to verify that the work is satisfactory.
6.1.2 Welds that require finishing shall also be examined in the finished condition in accordance with 6.3.
6.2 Prefinished Weld Visual Examination Acceptance Criteria
6.2.1 Weld Acceptance Criteria. The ftllowing provisions apply to the integrity of all welds prior to any postweld finishing operation and to welds specified in Annex A as WF-1. The weld quality shall meet the requirements shown in through 6.2.1 .8. Equipment constructed to other codes or specifications shall also meet the acceptance criteria of those codes or specifications. The weld shall be free of cracks. Complete fusion shall exist between adjacent passes of weld metal and between weld metal and base metal. All craters shall be filled to the full cross section of the weld. Weld profiles shall he in accordance with Figures 2(A), (B). or (D) and shall meet the limits stated below. Typical unacceptable weld profiles are shown in Figures 2(C) and (E).
(1) For fillet welds in Surface Classification Zones I and 2. convexity or concavity in final fabricated form shall be minimized to the extent that no roduct or cleaning solution would be trapped after cleaning or that the efTectiveness of cleaning is compromised. Fillet weld profiles may be slightly convex, flat, or slightly concave in Surface ClassifIcation Zones 3 and 4.AWS D18.3/D18.3M:2015 pdf free download.

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