Home / ASME B16.47 Large Diameter Flanges, Series B
ASME B16.47 Series B Flanges
Pipe Size Number
of Bolts
Diameter
of Bolts
Length
of Bolts
Class 150 26 36 3/4 5 1/2
28 40 3/4 5 3/4
30 44 3/4 5 3/4
32 48 3/4 5 3/4
34 40 7/8 6 1/4
36 44 7/8 6 3/4
38 40 1 7 1/4
40 44 1 7 1/4
42 48 1 7 1/2
44 52 1 7 3/4
46 40 1 1/8 8
48 44 1 1/8 8 1/4
50 48 1 1/8 8 1/2
52 52 1 1/8 8 3/4
54 56 1 1/8 8 3/4
56 60 1 1/8 9
58 48 1 1/4 9 1/4
60 52 1 1/4 9 1/2
Class 300 26 32 1 1/4 10 1/2
28 36 1 1/4 10 1/2
30 36 1 3/8 11 1/4
32 32 1 1/2 12 1/4
34 36 1 5/8 12 1/4
36 32 1 5/8 12 1/2
38 36 1 5/8 13 1/4
40 40 1 3/4 13 1/2
42 36 1 3/4 14
44 40 1 7/8 14 3/4
46 36 1 7/8 15
48 40 1 7/8 15
50 44 1 7/8 15 3/4
52 48 1 7/8 16
54 48 1 7/8 15 3/4
56 36 2 1/4 17 3/4
58 40 2 1/4 17 3/4
60 40 2 1/4 17 1/2
Class 400 26 28 1 3/8 11 1/4
28 24 1 1/2 12
30 28 1 1/2 12 1/2
32 28 1 5/8 13 1/2
34 32 1 5/8 13 3/4
36 28 1 3/4 15 1/2
Class 600 26 28 1 5/8 13 3/4
28 28 1 3/4 14 1/4
30 28 1 7/8 15 1/4
32 28 2 15 3/4
34 24 2 1/4 17 1/4
36 28 2 1/4 17 3/4
Class 900 26 20 2 1/2 17 1/4
28 20 2 3/4 19
30 20 3 20
32 20 3 20 1/4
34 20 3 1/4 21 3/4
36 24 3 21 1/4