MESteel
Bulb flats · Size & tolerance table

Bulb flats — HP sizes 80 × 6 to 430 × 17 (EN 10067, JIS G3192)

Standard: EN 10067 · JIS G3192 · ISO 657-19

A bulb flat is a flat bar with a rounded bulb along one edge. It is welded by its plain edge to a ship or bridge-deck plate as a stiffener; the bulb puts steel where it adds most stiffness and is easier to weld, coat and inspect than the toe of an angle.

The HP (Holland profile) series below is the international series used by shipyards worldwide, designated width × thickness in millimetres. Shipbuilding grades are certified by a classification society (grade A, AH36 and so on).

HP bulb flats — dimensions and properties

Section Mass and area Dimensions Surface Properties
Designation G kg/m A cm² b mm t mm c mm r1 mm AL m²/m Cx cm Ix cm⁴ Zx cm³
HP 80 × 6 4.87 6.20 80 6 14 4 0.192 4.78 39.0 8.15
HP 80 × 7 5.50 7.00 80 7 14 4 0.194 4.69 43.3 9.24
HP 100 × 7 6.86 8.74 100 7 15.5 4.5 0.236 5.87 85.3 14.5
HP 100 × 8 7.65 9.74 100 8 15.5 4.5 0.238 5.78 94.3 16.3
HP 120 × 7 8.25 10.5 120 7 17 5 0.278 7.07 148 21.0
HP 120 × 8 9.19 11.7 120 8 17 5 0.280 6.96 164 23.6
HP 140 × 7 9.74 12.4 140 7 19 5.5 0.320 8.31 241 29.0
HP 140 × 8 10.8 13.8 140 8 19 5.5 0.322 8.18 268 32.5
HP 160 × 7 11.4 14.6 160 7 22 6 0.365 9.66 373 38.6
HP 160 × 8 12.7 16.2 160 8 22 6 0.367 9.49 411 43.3
HP 160 × 9 14.0 17.8 160 9 22 6 0.369 9.36 448 47.9
HP 180 × 8 14.8 18.9 180 8 25 7 0.411 10.9 609 55.9
HP 180 × 9 16.2 20.7 180 9 25 7 0.413 10.7 663 61.8
HP 180 × 10 17.6 22.5 180 10 25 7 0.415 10.6 717 67.8
HP 200 × 9 18.5 23.6 200 9 28 8 0.457 12.1 941 77.7
HP 200 × 10 20.1 25.6 200 10 28 8 0.459 11.9 1020 85.0
HP 200 × 11.5 22.5 28.6 200 11.5 28 8 0.462 11.7 1130 96.2
HP 220 × 10 22.8 29.0 220 10 31 9 0.503 13.4 1400 105
HP 220 × 11.5 25.4 32.3 220 11.5 31 9 0.506 13.1 1550 118
HP 240 × 10 25.4 32.4 240 10 34 10 0.547 14.7 1860 126
HP 240 × 11 27.4 34.9 240 11 34 10 0.549 14.6 2000 137
HP 240 × 12 29.3 37.3 240 12 34 10 0.551 14.4 2130 148
HP 260 × 10 28.3 36.1 260 10 37 11 0.593 16.2 2470 153
HP 260 × 11 30.3 38.7 260 11 37 11 0.593 16.0 2610 162
HP 260 × 12 32.4 41.3 260 12 37 11 0.595 15.8 2770 175
HP 280 × 11 33.5 42.6 280 11 40 12 0.637 17.4 3330 191
HP 280 × 12 35.7 45.5 280 12 40 12 0.639 17.2 3550 206
HP 300 × 11 36.7 46.7 300 11 43 13 0.681 18.9 4190 222
HP 300 × 12 39.0 49.7 300 12 43 13 0.683 18.7 4460 239
HP 300 × 13 41.5 52.8 300 13 43 13 0.685 18.5 4720 256
HP 320 × 12 42.5 54.2 320 12 46 14 0.728 20.1 5530 274
HP 320 × 13 45.0 57.4 320 13 46 14 0.730 19.9 5850 294
HP 340 × 12 46.1 58.8 340 12 49 15 0.772 21.5 6760 313
HP 340 × 14 51.5 65.5 340 14 49 15 0.776 21.1 7540 357
HP 370 × 13 54.6 69.6 370 13 53.5 16.5 0.840 23.5 9470 402
HP 370 × 15 60.5 77.0 370 15 53.5 16.5 0.844 23.0 10400 455
HP 400 × 14 63.9 81.4 400 14 58 18 0.908 25.5 12900 507
HP 400 × 16 70.2 89.4 400 16 58 18 0.912 25.0 14200 568
HP 430 × 15 73.9 94.1 430 15 62.5 19.5 0.976 27.4 17300 628
HP 430 × 17 80.6 103 430 17 62.5 19.5 0.980 26.9 18900 700

JIS bulb plates (Japanese type)

The Japanese bulb plate is a different shape: a flat with an angled bulb on one side of the edge, designated by depth A × thickness t, with d the projection of the bulb.

Section Dimensions Area and mass Centroid Moment of inertia Radius of gyration Axes Modulus
Size A mm t mm d mm r1 mm r2 mm Area cm² G kg/m Cx cm Cy cm Ix cm⁴ Iy cm⁴ Iu cm⁴ Iv cm⁴ ix cm iy cm iu cm iv cm tan α Zx cm³ Zy cm³
180 × 9.5 180 9.5 23 7 2 21.06 16.5 7.49 0.746 671 9.48 673 7.34 5.64 0.671 5.65 0.591 0.0568 63.8 3.79
200 × 10 200 10 26.5 8 2 25.23 19.8 8.16 0.834 997 15.1 1000 11.4 6.29 0.773 6.30 0.672 0.0611 84.2 5.35
230 × 11 230 11 30 9 2 31.98 25.1 9.36 0.927 1680 24.2 1680 18.3 7.24 0.870 7.25 0.755 0.0599 123 7.62
250 × 12 250 12 33 10 2 38.13 29.9 10.1 1.02 2360 35.2 2370 26.4 7.87 0.960 7.88 0.832 0.0612 159 10.1

Notes

We use Google Analytics to count visits and see which pages are read. Nothing is used for advertising. Privacy policy