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DIN 2634 PN25 Welding Neck Flange Dimensions, Technical Drawings, and Approx. Flange Weight DOWNLOAD DIN 2634 PN25 WELDING NECK FLANGE DIMENSIONS, TECHNICAL DRAWINGS, AND APPROX. FLANGE WEIGHT PDF Get Complete details of DIN Standard Flanges DIN 2634 PN25 Welding Neck Flange Dimensions Dimensions and Approx. Flange Weight Pipe Parameter d1 Flange Dimension Neck Size Hub Size Screw Approx. Flange Weight DN  ISO  DIN  D  b  k  h1  d3  s r  h2  d4  f  No. of Holes d2  KG/PCS 10 –  14 90 16 60 35 25 1.8 4 6 40 2 4 14 0.67 17.2 –  90 16 60 35 28 1.8 4 6 40 2 4 14 0.66 15 –  20 95 16 65 38 30 2 4 6 45 2 4 14 0.75 21.3 –  95 16 65 38 32 2 4 6 45 2 4 14 0.75 20 –  25 105 18 75 40 38 2.3 4 6 58 2 4 14 1.07 26.9 –  105 18 75 40 40 2.3 4 6 58 2 4 14 1.07 25 –  30 115 18 85 40 42 2.6 4 6 68 2 4 14 1.29 33.7 –  115 18 85 40 46 2.6 4 6 68 2 4 14 1.28 32 –  38 140 18 100 42 52 2.6 6 6 78 2 4 18 1.88 42.4 –  140 18 100 42 56 2.6 6 6 78 2 4 18 1.86 40 –  44.5 150 18 110 45 60 2.6 6 7 88 3 4 18 2.1 48.3 –  150 18 110 45 64 2.6 6 7 88 3 4 18 2.08 50 –  57 165 20 125 48 72 2.9 6 8 102 3 4 18 2.81 60.3 –  165 20 125 48 75 2.9 6 8 102 3 4 18 2.78 65 76.1 –  185 22…