Pipe
size,
Inches.		 Flange
diameter,
inches.		 Flange
thickness
at hub
for iron
pipe,
inches.		 Flange
thickness
at edge,
inches.		 Width
flange
face,
inches.
  2     6 1     5⁄8   2
  21⁄2     7 11⁄8     11⁄16   21⁄4
  3     71⁄2 11⁄4     3⁄4   21⁄4
  31⁄2     81⁄2 11⁄4     13⁄16   21⁄2
  4     9 13⁄8     15⁄16   21⁄2
  41⁄2     91⁄4 13⁄8     15⁄16   23⁄8
  5     10 11⁄2     15⁄16   21⁄2
  6     11 11⁄2     1   21⁄2
  7     121⁄2 11⁄2     11⁄16   23⁄4
  8     131⁄2 13⁄4     11⁄8   23⁄4
  9     15 13⁄4     11⁄8   3
10     16 2     13⁄16   3
12     19 2     11⁄4   31⁄2
14     21 2     13⁄8   31⁄2
15     221⁄4 2     15⁄8   35⁄8
16     231⁄2 21⁄4     17⁄16   33⁄4
18     25 ....     19⁄16   31⁄2
20     271⁄2 ....     111⁄16   33⁄4
22     291⁄2 ....     113⁄16   33⁄4
24 311⁄2   32 .... 11⁄4   17⁄8 33⁄4 4
26 333⁄4   341⁄4 .... 13⁄8   2 37⁄8 41⁄8
28 36   361⁄2 .... 17⁄16   21⁄16 4 41⁄4
30 38   383⁄4 .... 11⁄2   21⁄8 4 43⁄8
36 441⁄2   453⁄4 .... 13⁄4   23⁄8 41⁄4 47⁄8
42 51   523⁄4 .... 17⁄8   25⁄8 41⁄2 53⁄8
48 571⁄2   591⁄2 .... 2   23⁄4 43⁄4 53⁄4
Pipe
size,
Inches.		 Width
flange
face,
inches.		 Bolt circle
diameter,
inches.		 Number
of
bolts.		 Bolt size
diameters,
inches.		 Bolt
length,
inches.		 Stress on
each bolt,
per square
inch at
bottom of
thread at
200 lbs.
  2     2     43⁄4   4   1⁄2   5⁄8 2    825
  21⁄2     21⁄4     51⁄2   4   1⁄2   5⁄8 21⁄4 1,050
  3     21⁄4     6   4   1⁄2   5⁄8 21⁄2 1,330
  31⁄2     21⁄2     7   4   1⁄2   5⁄8 21⁄2 2,530
  4     21⁄2     71⁄2   4   3⁄8   3⁄4 23⁄4 2,100
  41⁄2     23⁄8     73⁄4   8   5⁄8   3⁄4 3 1,430
  5     21⁄2     81⁄2   8   5⁄8   3⁄4 3 1,630
  6     21⁄2     91⁄2   8   5⁄8   3⁄4 3 2,360
  7     23⁄4   103⁄4   8   5⁄8   3⁄4 31⁄4 3,200
  8     23⁄4   113⁄4   8   5⁄8   3⁄4 31⁄2 4,190
  9     3   131⁄4 12   5⁄8   3⁄4 31⁄2 3,610
10     3   141⁄4 12   5⁄8   7⁄8 35⁄8 2,970
12     31⁄2   17 12   3⁄4   7⁄8 33⁄4 4,280
14     31⁄2   183⁄4 12   7⁄8 1 41⁄4 4,280
15     35⁄8   20 16   7⁄8 1 41⁄4 3,660
16     33⁄4   211⁄4 16   7⁄8 1 41⁄4 4,210
18     31⁄2   223⁄4 16 1 17⁄8 43⁄4 4,540
20     33⁄4   25 20 1 11⁄8 5 4,490
22     33⁄4   271⁄4 20 1 11⁄4 51⁄2 4,320
24   33⁄4   4 291⁄4 291⁄2 20 1 11⁄4 51⁄2 5,130
26   37⁄8   41⁄8 311⁄4 313⁄4 24 1 11⁄4 53⁄4 5,030
28   4   41⁄4 331⁄2 34 28 1 11⁄4 6 5,000
30   4   43⁄8 351⁄2 36 28 11⁄8 13⁄8 61⁄4 4,590
36   41⁄4   47⁄8 42 423⁄4 32 11⁄8 13⁄8 61⁄2 5,790
42   41⁄2   53⁄8 481⁄2 491⁄2 36 11⁄4 11⁄2 71⁄4 5,700
48   43⁄4   53⁄4 543⁄4 56 44 13⁄8 11⁄2 73⁄4 6,090

DIMENSIONS OF CAST IRON PIPE, FLANGES, ETC.

(J. E. Codman, Engineers’ Club of Philadelphia, 1889.)

Diameter
of Pipe.		 Diameter
of Flange.		 Diameter
of Bolt
Circle.		 Diameter
of Bolt.		 Number
of Bolts.
  2   61⁄4   43⁄4   3⁄4   4
  3   71⁄2   57⁄8   3⁄4   4
  4   9   7   3⁄4   6
  5   93⁄4   8   3⁄4   6
  6 103⁄4   91⁄8   3⁄4   8
  8 131⁄4 113⁄8   3⁄4   8
10 151⁄4 131⁄4   3⁄4 10
12 173⁄4 153⁄4   7⁄8 12
14 20 18   7⁄8 14
16 22 20   7⁄8 16
18 24 221⁄4   7⁄8 16
20 27 241⁄2 1 18
22 283⁄4 261⁄2 1 20
24 311⁄4 283⁄4 1 22
26 331⁄4 31 1 24
28 351⁄2 331⁄4 1 24
30 38 351⁄2 1 26
32 40 371⁄2 11⁄8 28
34 421⁄4 40 11⁄8 30
36 45 42 11⁄8 32
38 47 44 11⁄8 32
40 49 46 11⁄8 34
42 511⁄4 481⁄4 11⁄8 34
44 531⁄2 501⁄4 11⁄4 36
46 553⁄4 523⁄4 11⁄4 38
48 58 55 11⁄4 40
Diameter
of Pipe.		 Thickness
of Flange.		 Thickness
of Pipe.		 Weight
per foot
without
Flange.		 Weight of
Flange
and Bolts.
Frac. Dec.
  2   5⁄8   3⁄8   .373     6.96     4.41
  3   5⁄8   13⁄32   .396   11.16     5.93
  4   11⁄16   7⁄16   .420   15.84     7.66
  5   3⁄4   7⁄16   .443   21.00     9.63
  6   3⁄4   15⁄32   .466   26.64   11.82
  8   13⁄16   1⁄2   .511   39.36   16.91
10   7⁄8   9⁄16   .557   54.00   23.00
12   15⁄16   19⁄32   .603   70.56   30.13
14 1   21⁄32   .649   89.04   38.34
16 11⁄16   11⁄16   .695 109.44   47.70
18 11⁄8   3⁄4   .741 131.76   58.23
20 13⁄16   25⁄32   .787 156.00   70.00
22 11⁄4   27⁄32   .833 182.16   83.05
24 15⁄16   7⁄8   .879 210.24   97.42
26 13⁄8   15⁄16   .925 240.24 113.18
28 17⁄16   31⁄32   .971 272.16 130.35
30 19⁄16 1 1.017 306.00 149.00
32 15⁄8 11⁄16 1.063 341.76 169.17
34 111⁄16 11⁄8 1.109 379.44 190.90
36 13⁄4 15⁄32 1.155 419.04 214.26
38 113⁄16 13⁄16 1.201 460.56 239.27
40 17⁄8 11⁄4 1.247 504.00 266.00
42 115⁄16 15⁄16 1.293 549.36 294.49
44 2 111⁄32 1.339 596.64 324.78
46 21⁄16 13⁄8 1.385 645.84 356.94
48 21⁄8 17⁄16 1.431 696.96 391.00

FLANGE SIZES FOR EXTRA HEAVY PIPE.

Adopted by a Conference of Manufacturers, June 28, 1901.

Size of
Pipe.		 Diam. of
Flange.		 Thickness
of Flange.		 Diameter of
Bolt Circle.		 Number of
Bolts.		 Size of
Bolts.
Inches. Inches. Inches. Inches.   Inches.
  2   61⁄2   7⁄8   5   4   5⁄8
  21⁄2   71⁄2 1   57⁄8   4   3⁄4
  3   81⁄4 11⁄8   65⁄8   8   5⁄8
  31⁄2   9 13⁄16   71⁄4   8   5⁄8
  4 10 11⁄4   77⁄8   8   3⁄4
  41⁄2 101⁄2 15⁄16   81⁄2   8   3⁄4
  5 11 13⁄8   91⁄4   8   3⁄4
  6 121⁄2 17⁄16 105⁄8 12   3⁄4
  7 14 11⁄2 117⁄8 12   7⁄8
  8 15 15⁄8 13 12   7⁄8
  9 16 13⁄4 14 12   7⁄8
10 171⁄2 17⁄8 151⁄4 16   7⁄8
12 20 2 173⁄4 16   7⁄8
14 221⁄2 21⁄8 20 20   7⁄8
15 231⁄2 23⁄16 21 20 1
16 25 21⁄4 221⁄2 20 1
18 27 23⁄8 241⁄2 24 1
20 291⁄2 21⁄2 263⁄4 24 11⁄8
22 311⁄2 25⁄8 283⁄4 28 11⁄8
24 34 23⁄4 311⁄4 28 11⁄8