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Technical Info - Flange Bolt-Up Charts

ASME B16.5 Flanges
ASME B16.47 Large Diameter Flanges, Series A
ASME B16.47 Large Diameter Flanges, Series B

ASME B16.5 Flanges

Bolt-Up Chart for Class 2500 Flange
Flange Bolts Length of Stud Bolts
Pipe Size Number
of Bolts		 Diameter
of Bolts		 Raised Face Ring Joint
Class 2500
Length of Stud Bolts
Pipe Size Number
of Bolts		 Diameter
of Bolts		 Raised Face Ring Joint
1/2 4 3/4 4 3/4 4 3/4
3/4 4 3/4 5 5
1 4 7/8 5 1/2 5 1/2
1 1/4 4 1 6 6
1 1/2 4 1 1/8 6 3/4 6 3/4
2 8 1 7 7
2 1/2 8 1 1/8 7 3/4 8
3 8 1 1/4 8 3/4 9
4 8 1 1/2 10 10 1/4
5 8 1 3/4 11 3/4 12 1/4
6 8 2 13 1/2 14
8 12 2 15 15 1/2
10 12 2 1/2 19 1/4 20
12 12 2 3/4 21 1/4 22

ASME B16.47 Large Diameter Flanges, Series A

ASME B16.47 Series A Flanges
Pipe Size Number
of Bolts		 Diameter
of Bolts		 Length
of Bolts		  
Series A
Pipe Size Number
of Bolts		 Diameter
of Bolts		 Length
of Bolts		  
Class 150 26 24 1 1/4 8 3/4
28 28 1 1/4 9
30 28 1 1/4 9 1/4
32 28 1 1/2 10 1/2
34 32 1 1/2 10 1/2
36 32 1 1/2 11 1/4
38 32 1 1/2 11
40 36 1 1/2 11 1/4
42 36 1 1/2 11 3/4
44 40 1 1/2 12
46 40 1 1/2 12 1/4
48 44 1 1/2 12 3/4
50 44 1 3/4 13 1/2
52 44 1 3/4 13 3/4
54 44 1 3/4 14 1/4
56 48 1 3/4 14 1/2
58 48 1 3/4 14 3/4
60 52 1 3/4 15
Class 300 26 28 1 5/8 10 1/2
28 28 1 5/8 11
30 28 1 3/4 11 3/4
32 28 1 7/8 12 3/4
34 28 1 7/8 13
36 32 2 13 1/2
38 32 1 1/2 12 3/4
40 32 1 5/8 13 1/2
42 32 1 5/8 13 3/4
44 32 1 3/4 14 1/2
46 28 1 7/8 15
48 32 1 7/8 15 1/2
50 32 2 16 1/4
52 32 2 16 1/2
54 28 2 1/4 17 3/4
56 28 2 1/4 17 3/4
58 32 2 1/4 18 1/4
60 32 2 1/4 18 3/4
Class 400 26 28 1 3/4 12
28 28 1 7/8 13
30 28 2 13 1/2
32 28 2 14
34 28 2 14 1/4
36 32 2 14 1/2
38 32 1 3/4 15
40 32 1 7/8 15 1/2
42 32 1 7/8 16
44 32 2 16 1/2
46 36 2 17
48 28 2 1/4 18 1/4
50 32 2 1/4 18 3/4
52 32 2 1/4 19
54 28 2 1/2 20 1/4
56 32 2 1/2 20 1/2
58 32 2 1/2 20 3/4
60 32 2 3/4 22
Class 600 26 28 1 7/8 14
28 28 2 14 1/2
30 28 2 14 1/2
32 28 2 1/4 15 1/2
34 28 2 1/4 15 3/4
36 28 2 1/2 16 1/2
38 28 2 1/4 18 1/4
40 32 2 1/4 18 3/4
42 28 2 1/2 20
44 32 2 1/2 20 1/4
46 32 2 1/2 20 3/4
48 32 2 3/4 22 1/4
50 28 3 23 3/4
52 32 3 23 3/4
54 32 3 24 1/4
56 32 3 1/4 25 1/2
58 32 3 1/4 25 3/4
60 28 3 1/2 27 1/4
Class 900 26 20 2 3/4 18 1/4
28 20 3 19
30 20 3 19 1/2
32 20 3 1/4 20 1/2
34 20 3 1/2 21 3/4
36 20 3 1/2 22 1/4
38 20 3 1/2 23 3/4
40 24 3 1/2 24 1/4
42 24 3 1/2 25
44 24 3 3/4 26 1/4
46 24 4 27 1/2
48 24 4 28 1/4

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		  
Series A
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 1/2 12 1/4
36 32 1 5/8 12 1/2
38 36 1 5/8 13 1/4
40 40 1 5/8 13 1/2
42 36 1 3/4 14
44 40 1 3/4 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

Technical Information - Flange Bolt Up Charts

Flange Bolt Up Charts for Series 150, 300, 600, 900 and 1500 Flanges.

4330 N Link St, Ste A
Groves, TX 77619
ph 409.727.7384

 921 W Pasadena Fwy
Pasadena, TX 77506
ph 713.475.6100

 2234 Industrial Drive
Ste B
Sulphur, LA 70665
ph 337.882.6887
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