Bulb flats are mainly used in the field of shipbuilding and bridge, and the shipbuilding bulb flats are auxiliary profile steel in shipbuilding. With the rapid development of shipbuilding industry in recent years, the demand for marine/ shipbuilding bulb flat steel is is large demand. Generally large ships and regular ships usually design marine bulb flats as main hull materials.
The material of shipbuilding bulb flats is corresponding to that of shipbuilding plates, which is divided into general strength (Class A, B and D etc.) and high strength (AH32, AH36, DH32 and DH36, etc.). The Shipbuilding steel plates that verified by different classification society need supporting use of shipbuilding bulb flats with responding classification society verification.
Bulb flats steel grades:
|
Standard |
Steel Grade |
|||
|
ASTM A131 |
A |
B |
D |
E |
|
AH32 |
DH32 |
EH32 |
FH32 |
|
|
AH36 |
DH36 |
EH36 |
FH36 |
|
|
AH40 |
DH40 |
EH40 |
FH40 |
|
Available classification society: ABS, LR, GL, CCS, RINA, DNV, BV, NK, KR, RMRS
GB/T9945-2012 Bulb flats size
|
RODUCT MODEL |
DIMENSIONS(mm) |
SECTIONAL AREA(cm2) |
MASS/UNIT LENGTH(kg/m) |
TOLERANCES(mm) |
||||||
|
b |
t |
h |
rl |
r |
b |
t |
h |
|||
|
80×5 |
80 |
5 |
19 |
4 |
≤1.5 |
5.41 |
4.25 |
±1.5 |
0.7 |
±0.5 |
|
80×6 |
6 |
20 |
≤2 |
6.21 |
4.88 |
|
||||
|
100×7 |
100 |
7 |
22.5 |
4.5 |
≤2 |
8.74 |
6.86 |
|
||
|
100×8 |
8 |
23.5 |
9.74 |
7.65 |
|
|||||
|
120×6 |
120 |
6 |
23 |
5 |
≤2 |
9.32 |
7.32 |
|
||
|
120×7 |
7 |
24 |
10.52 |
8.26 |
|
|||||
|
120×8 |
8 |
25 |
11.72 |
9.2 |
-0.3 |
|||||
|
140×7 |
140 |
7 |
26 |
5.5 |
≤2 |
12.43 |
9.75 |
±2.0 |
1 |
±0.8 |
|
140×8 |
8 |
27 |
13.83 |
10.85 |
|
|||||
|
140×10 |
10 |
29 |
≤3 |
16.63 |
13.05 |
|
||||
|
160×7 |
160 |
7 |
29 |
6 |
≤2 |
14.6 |
11.46 |
|
||
|
160×8 |
8 |
30 |
16.2 |
12.72 |
|
|||||
|
160×9 |
9 |
31 |
17.8 |
13.97 |
|
|||||
|
160×11 |
11 |
33 |
≤3 |
21 |
16.49 |
|
||||
|
180×8 |
180 |
8 |
33 |
7 |
≤2 |
18.86 |
14.8 |
|
||
|
180×9 |
9 |
34 |
20.66 |
16.22 |
|
|||||
|
180×10 |
10 |
35 |
≤3 |
22.46 |
17.63 |
|
||||
|
180×11 |
11 |
36 |
24.26 |
19.04 |
-0.3 |
|||||
|
200×9 |
200 |
9 |
37 |
8 |
≤2 |
23.66 |
18.57 |
±3.0 |
1.1 |
±0.95 |
|
200×10 |
10 |
38 |
≤3 |
25.66 |
20.14 |
|
||||
|
200×11 |
11 |
39 |
27.66 |
21.71 |
|
|||||
|
200×12 |
12 |
40 |
29.66 |
23.28 |
|
|||||
|
220×10 |
220 |
10 |
41 |
9 |
≤3 |
29.66 |
22.27 |
|
||
|
220×11 |
11 |
42 |
29 |
24.5 |
|
|||||
|
220×12 |
12 |
43 |
31.2 |
26.22 |
|
|||||
|
240×10 |
240 |
10 |
40 |
10 |
≤3 |
33.49 |
25.5 |
|
||
|
240×11 |
11 |
45 |
34.89 |
27.39 |
|
|||||
|
240×12 |
12 |
46 |
37.29 |
29.27 |
|
|||||
|
260×10 |
260 |
10 |
47 |
11 |
≤3 |
36.11 |
28.35 |
|
||
|
260×11 |
11 |
48 |
38.71 |
30.39 |
|
|||||
|
260×12 |
12 |
49 |
41.31 |
32.43 |
|
|||||
|
280×11 |
280 |
11 |
51 |
12 |
≤3 |
42.68 |
33.5 |
|
||
|
280×12 |
12 |
52 |
45.48 |
35.7 |
|
|||||
|
280×13 |
13 |
53 |
48.28 |
37.9 |
|
|||||
|
300×11 |
300 |
11 |
54 |
13 |
≤3 |
46.78 |
36.7 |
|
||
|
300×12 |
12 |
55 |
49.79 |
39.09 |
|
|||||
|
300×13 |
13 |
56 |
52.79 |
41.44 |
-0.3 |
|||||
|
320×12 |
320 |
12 |
58 |
14 |
≤3 |
54.25 |
42.6 |
±4.0 |
1.3 |
1.1 |
|
320×13 |
13 |
59 |
57.25 |
45.09 |
|
|||||
|
320×14 |
14 |
60 |
≤4 |
60.85 |
47.6 |
|
||||
|
340×12 |
340 |
12 |
61 |
15 |
≤3 |
58.84 |
46.2 |
|
||
|
340×13 |
13 |
62 |
62.24 |
48.86 |
|
|||||
|
340×14 |
14 |
63 |
≤4 |
65.54 |
51.5 |
|
||||
|
370×13 |
370 |
13 |
66.5 |
16.5 |
≤3 |
69.7 |
54.7 |
|
||
|
370×14 |
14 |
67.5 |
≤4 |
73.4 |
57.6 |
|
||||
|
370×15 |
15 |
68.5 |
77.1 |
60.5 |
|
|||||
|
400×14 |
400 |
14 |
72 |
18 |
≤4 |
81.48 |
63.96 |
|
||
|
400×15 |
15 |
73 |
85.48 |
67.1 |
|
|||||
|
400×16 |
16 |
74 |
89.48 |
70.2 |
|
|||||
|
430×14 |
430 |
14 |
76.5 |
19.5 |
≤4 |
89.7 |
70.6 |
|
||
|
430×15 |
15 |
77.5 |
94.19 |
73.9 |
|
|||||
|
430×17 |
17 |
79.5 |
102.79 |
80.7 |
|
|||||
|
430×19 |
19 |
81.5 |
111.39 |
87.4 |
|
|||||
|
430×20 |
20 |
82.5 |
115 |
90.8 |
-0.3 |
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BBN steel is always take the leading position for exporting shipbuilding steel. And BBN even take the largest stock of shipbuilding profile steel in China. The shipbuilding steel, shipbuilding Angle steel etc. products of BBN steel can be seen in shipyards all over the world. BBN steel always make effort to decrease cost, improve quality, speed up delivery, and to bring more satisfied surprise to you.
Source:
Just like you, 70% customers choose long-term cooperation with BBN steel not only for our good product and service quality, good reputation in the international market, but also for our experienced one-stop raw material supply and further steel processing!
