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GB/T9945-2012 Bulb flats steel plate

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

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.

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