DNV Grade B bulb flat is another common strength shipbuilding bulb flat.Comparing DNV Grade A bulb flat,DNV Grade B buld flat shall be done low temperature impacting test at room temperature when rolling.Now we list our rolling sizes for DNV Grade B buld flats:
Model Nominal Size (mm) Section Area Weight (kg/m) b t h rl r HP80×5 80 5 19 4 ≤1.5 5.41 4.25 6 20 ≤2 6.21 4.88 HP100×7 100 7 22.5 4.5 ≤2 8.74 6.86 8 23.5 9.74 7.65 HP120×6 120 6 23 5 ≤2 9.32 7.32 7 24 10.52 8.26 8 25 11.72 9.20 HP140×7 140 7 26 5.5 ≤2 12.43 9.75 8 27 13.83 10.85 10 29 ≤3 16.63 13.05 HP160×7 160 7 29 6 ≤2 14.60 11.46 8 30 16.20 12.72 9 31 17.80 13.97 11 33 ≤3 21.00 16.49 HP180×8 180 8 33 7 ≤2 18.86 14.80 9 34 20.66 16.22 10 35 ≤3 22.46 17.63 11 36 24.26 19.04 HP200×9 200 9 37 8 ≤2 23.66 18.57 10 38 ≤3 25.66 20.14 11 39 27.66 21.71 12 40 29.66 23.28 HP220×10 220 10 41 9 ≤3 29.66 22.27 11 42 29.00 24.50 12 43 31.20 26.22 HP240×10 240 10 40 10 ≤3 33.49 25.50 11 45 34.89 27.39 12 46 37.29 29.27 HP260×10 260 10 47 11 ≤3 36.11 28.35 11 48 38.71 30.39 12 49 41.31 32.43 HP280×11 280 11 51 12 ≤3 42.68 33.50 12 52 45.48 35.70 13 53 48.28 37.90 HP300×11 300 11 54 13 ≤3 46.78 36.70 12 55 49.79 39.09 13 56 52.79 41.44 HP320×12 320 12 58 14 ≤3 54.25 42.60 13 59 57.25 45.09 14 60 ≤4 60.85 47.60 HP340×12 340 12 61 15 ≤3 58.84 46.20 13 62 62.24 48.86 14 63 ≤4 65.54 51.50 HP370×13 370 13 66.5 16.5 ≤3 69.70 54.70 14 67.5 ≤4 73.40 57.60 15 68.5 77.10 60.50 HP400×14 400 14 72 18 ≤4 81.48 63.96 15 73 85.48 67.10 16 74 89.48 70.20 HP430×14 430 14 76.5 19.5 ≤4 89.70 70.60 15 77.5 94.19 73.90 17 79.5 102.79 80.70 19 81.5 111.39 87.40 20 82.5 115.00 90.80
(cm2)
HP80×6
HP100×8
HP120×7
HP120×8
HP140×8
HP140×10
HP160×8
HP160×9
HP160×11
HP180×9
HP180×10
HP180×11
HP200×10
HP200×11
HP200×12
HP220×11
HP220×12
HP240×11
HP240×12
HP260×11
HP260×12
HP280×12
HP280×13
HP300×12
HP300×13
HP320×13
HP320×14
HP340×13
HP340×14
HP370×14
HP370×15
HP400×15
HP400×16
HP430×15
HP430×17
HP430×19
HP430×20