Page 117 - 2010-2022 hose manufactureing ability and guide

TABLE 11-6
PIPE FLANGE DIMENSIONS
125 LB. U.S.A. STANDARD CAST IRON ― ANSI B16.1
150 LB. U.S.A. STANDARD STEEL ― ANSI B16.5

Steel is generally used.

Designated O.D. of Thickness Bolt No. of Size of Approx. Wt.-Lbs.
Pipe Size Flange Of Flange Circle Bolts Bolt Forged Steel
Inches Inches Inches Inches Inches (Slip-on* * *
or Threaded)

1 4.250 0.563* 3.125 4 1/2 2
1 1/4 4.625 0.625* 3.500 4 1/2 3
1 1/2 5.000 0.688* 3.875 4 1/2 3
2 6.000 0.750* 4.750 4 5/8 5
2 1/2 7.000 0.875* * 5.500 4 5/8 8
3 7.500 0.938* * 6.000 4 5/8 9
3 1/2 8.500 0.938* 7.000 8 5/8 12
4 9.000 0.938 7.500 8 5/8 13
5 10.000 0.938 8.500 8 3/4 14
6 11.0 1.000 9.500 8 3/4 18
8 13.50 1.125 11.75 8 3/4 27
10 16.00 1.188 14.25 12 7/8 37
12 19.00 1.250 17.00 12 7/8 59
14 21.00 1.375 18.75 12 1 79
16 23.50 1.438 21.25 16 1 101
18 25.00 1.563 22.75 16 1 1/8 112
20 27.50 1.688 25.00 20 1 1/8 146
24 32.00 1.875 29.50 20 1 1/4 210

*Cast Iron are 0.125” thinner. Figures above apply to Forged Steel.
** Cast Iron are 0.188” thinner. Figures above apply to Forged Steel.
***Cast Iron flanges are not available in slip-on style.

125 LB. FLANGES ARE FLAT FACE
150 LB. AND 300 LB. STEEL FLANGES FURNISHED WITH 1/16” RAISED FACE (UNLESS
OTHERWISE SPECIFIED)
250 LB. CAST IRON FLANGES FURNISHED WITH 1/16” RAISED FACE (UNLESS OTHERWISE
SPECIFIED) FLANGE THICKNESS INCLUDES RAISED FACE

RMA/IP-2/2003 96