Cast Iron Flanges - ASME B16.1 Class 125 Dimensions

Dimensions of Class 125 FF Threaded Flanges as per ASME B16.1.

Metric Dimensions: All Dimensions are in mm unless noted otherwise in the table.

Cast Iron Flanges

Flanges Hub Blind Flanges Bolt Holes Bolting
Nom
Pipe
Size		 Dia.
of
Flange
O		 Min.
Thk.
of Flange
Q		 Min.
Dia.
X		 Min.
Length of
Hub and
Threads
Y		 Dia.
of Port
I		 Wall
Thk.
V		 Dia.
of Bolt
Circle		 Dia.
of Bolt
Holes		 Num.
of
Bolts		 Dia.
of
Bolts		 Length of
Bolts		 Length
of
Stud Bolts
1 110 11.1 49 18 25 9.6 79 5/8 4 1/2 45 ...
1-1/4 115 12.7 59 21 32 11.1 89 5/8 4 1/2 51 ...
1-1/2 125 14.3 65 22 38 12.7 98 5/8 4 1/2 51 ...
2 150 15.9 78 25 51 14.3 121 3/4 4 5/8 57 ...
2-1/2 180 17.5 91 29 64 15.9 140 3/4 4 5/8 64 ...
3 190 19.0 108 30 76 17.5 152 3/4 4 5/8 64 ...
3-1/2 215 20.6 122 32 89 19.0 178 3/4 8 5/8 70 ...
4 230 23.8 135 33 102 22.2 191 3/4 8 5/8 76 ...
5 255 23.8 164 37 127 22.2 216 7/8 8 3/4 76 ...
6 280 25.4 192 40 152 23.8 241 7/8 8 3/4 83 ...
8 345 28.6 246 45 203 27.0 299 7/8 8 3/4 89 ...
10 405 30.2 303 49 254 28.6 362 1 12 7/8 95 ...
12 485 31.8 357 56 305 20.6 432 1 12 7/8 95 ...
14 535 35.1 391 57 356 22.2 476 1-1/8 12 1 108 ...
16 595 36.5 445 64 406 25.4 540 1-1/8 16 1 114 ...
18 635 39.7 499 68 457 27.0 578 1-1/4 16 1-1/8 121 ...
20 700 42.9 553 73 508 28.6 635 1-1/4 20 1-1/8 127 ...
24 815 47.6 660 83 610 31.8 749 1-1/8 20 1-1/4 140 ...
30 985 54.0 ... ... 762 36.6 914 1-1/8 28 1-1/4 159 ...
36 1170 60.3 ... ... 914 41.3 1086 1-5/8 32 1-1/2 178 222
42 1345 66.7 ... ... 1066 46.0 1257 1-5/8 36 1-1/2 191 235
48 1510 69.9 ... ... 1219 50.8 1422 1-1/8 44 1-1/2 197 242
54 1685 76.2 ... ... ... ... 1594 2 44 1-1/4 216 267
60 1855 79.4 ... ... ... ... 1759 2 52 1-1/4 222 273
72 2195 88.9 ... ... ... ... 2096 2 60 1-1/4 241 292
84 2535 98.4 ... ... ... ... 2426 2-1/4 64 2 267 324
96 2875 108.0 ... ... ... ... 2756 2-1/2 68 2-1/4 292 356

Imperial Dimensions: All Dimensions are in inches.

Flanges Hub Blind Flanges Bolt Holes Bolting
Nom
Pipe
Size		 Dia.
of
Flange
O		 Min.
Thk.
of Flange
Q		 Min.
Dia.
X		 Min.
Length of
Hub and
Threads
Y		 Dia.
of Port
I		 Wall
Thk.
V		 Dia.
of Bolt
Circle		 Dia.
of Bolt
Holes		 Num.
of
Bolts		 Dia.
of
Bolts		 Length of
Bolts		 Length
of
Stud Bolts
1 4.25 0.44 1.94 0.69 1.00 0.38 3.12 5/8 4 1/2 2.00 ...
1-1/4 4.62 0.50 2.31 0.81 1.25 0.44 3.50 5/8 4 1/2 2.00 ...
1-1/2 5.00 0.56 2.56 0.88 1.50 0.50 3.88 5/8 4 1/2 2.00 ...
2 6.00 0.62 3.06 1.00 2.00 0.56 4.75 3/4 4 5/8 2.50 ...
2-1/2 7.00 0.69 3.56 1.12 2.50 0.63 5.50 3/4 4 5/8 2.50 ...
3 7.50 0.75 4.25 1.19 3.00 0.69 6.00 3/4 4 5/8 2.50 ...
3-1/2 8.50 0.81 4.81 1.25 3.50 0.75 7.00 3/4 8 5/8 3.00 ...
4 9.00 0.94 5.31 1.31 4.00 0.88 7.50 3/4 8 5/8 3.00 ...
5 10.00 0.94 6.44 1.44 5.00 0.88 8.50 7/8 8 3/4 3.00 ...
6 11.00 1.00 7.56 1.56 6.00 0.94 9.50 7/8 8 3/4 3.50 ...
8 13.50 1.12 9.69 1.75 8.00 1.06 11.75 7/8 8 3/4 3.50 ...
10 16.00 1.19 11.94 1.94 10.00 1.12 14.25 1 12 7/8 4.00 ...
12 19.00 1.25 14.06 2.19 12.00 0.81 17.00 1 12 7/8 4.00 ...
14 21.00 1.38 15.38 2.25 14.00 0.88 18.75 1-1/8 12 1 4.50 ...
16 23.50 1.44 17.50 2.50 16.00 1.00 21.25 1-1/8 16 1 4.50 ...
18 25.00 1.56 19.62 2.69 18.00 1.06 22.75 1-1/4 16 1-1/8 5.00 ...
20 27.50 1.69 21.75 2.88 20.00 1.12 25.00 1-1/4 20 1-1/8 5.00 ...
24 32.00 1.88 26.00 3.25 24.00 1.25 29.50 1-3/8 20 1-1/4 5.50 ...
30 38.75 2.12 ... ... 30.00 1.44 36.00 1-3/8 28 1-1/4 6.50  
36 46.00 2.38 ... ... 36.00 1.62 42.75 1-5/8 32 1-1/2 7.00 9.00
42 53.00 2.62 ... ... 42.00 1.81 49.50 1-5/8 36 1-1/2 7.50 9.50
48 59.50 2.75 ... ... 48.00 2.00 56.00 1-5/8 44 1-1/2 8.00 9.50
54 66.25 3.00 ... ... ... ... 62.75 2 44 1-3/4 8.50 10.50
60 73.00 3.12 ... ... ... ... 69.25 2 52 1-3/4 9.00 11.00
72 86.50 3.50 ... ... ... ... 82.50 2 60 1-3/4 9.50 11.50
84 99.75 3.88 ... ... ... ... 95.50 2-1/4 64 2 10.50 13.00
96 113.25 4.25 ... ... ... ... 108.50 2-1/2 68 2-1/4 11.50 14.00

Other articles you may like to read...

Dimensions of Class 150 RF Threaded ...
Dimensions of Class 150 RF Threaded ... All dimensions are in "mm" unless noted otherwise. Dimensions of Class 150 RF Threaded Flanges as per ASME B16.5. ... Threaded Flange Dimensions 7719 views
Cast Iron Flanges - ASME B16.1 Class...
Cast Iron Flanges - ASME B16.1 Class... Dimensions of Class 25 FF Threaded Flanges as per ASME B16.1. Metric Dimensions: All Dimensions are in mm unless noted ... Threaded Flange Dimensions 1458 views
Dimensions of Class 900 RF Threaded ...
Dimensions of Class 900 RF Threaded ... All dimensions are in "mm" unless noted otherwise. Dimensions of Class 900 RF Threaded Flanges as per ASME B16.5. ... Threaded Flange Dimensions 1251 views
Dimensions of Class 1500 RF Threaded...
Dimensions of Class 1500 RF Threaded... All dimensions are in "mm" unless noted otherwise. Dimensions of Class 1500 RF Threaded Flanges as per ASME B16.5. ... Threaded Flange Dimensions 1945 views
Dimensions of Class 600 RF Threaded ...
Dimensions of Class 600 RF Threaded ... All dimensions are in "mm" unless noted otherwise. Dimensions of Class 600 RF Threaded Flanges as per ASME B16.5. ... Threaded Flange Dimensions 3880 views
Dimensions of Class 300 RF Threaded ...
Dimensions of Class 300 RF Threaded ... All dimensions are in "mm" unless noted otherwise. Dimensions of Class 300 RF Threaded Flanges as per ASME B16.5. ... Threaded Flange Dimensions 3145 views
Hits: 19107