Dimensions of Carbon Steel Pipe
Standard Dimensions
 Conforming To Requirements ANSI B16.25
 

Nominal
Pipe Size		 Pipe
Schedule
Number		 [A]
Nominal
Pipe
O.D.		 Valve
Ouside
Diameter		 [B]
Inside
Diameter
Of Pipe		 [C]
Bore Of
Wlding
Lip		 Wall
Thickness
Of Pipe		 Pipe
Schedule
Number		 Nominal
Pipe Size
2½" 40
80
160
XXS		 2.875 27/8 2.469
2.323
2.125
1.771		 2.479
2.351
2.178
1.868		 0.203
0.276
0.375
0.552		 40
80
160
XXS		 2½"
3" 40
80
160
XXS		 3.500 319/32 3.068
2.900
2.624
2.300		 3.081
2.934
2.692
2.409		 0.216
0.300
0.438
0.600 		40
80
160
XXS		 3"
4" 40
80
120
160
XXS		 4.500 45/8 4.026
3.826
3.624
3.438
3.152		 4.044
3.869
3.692
3.530
3.279		 0.237
0.337
0.438
0.531
0.674 		40
80
120
160
XXS		 4"
5" 40
80
120
160
XXS		 5.563 511/16 5.047
4.813
4.563
4.313
4.063		 5.070
4.866
4.647
4.428
4.209		 0.258
0.375
0.500
0.625
0.750		 40
80
120
160
XXS		 5"
6" 40
80
120
160
XXS		 6.625 625/32 6.065
5.761
5.501
5.189
4.897		 6.097
5.825
5.600
5.327
5.072		 0.280
0.432
0.562
0.719
0.864		 40
80
120
160
XXS		 6"
8" 40
60
80
100
120
140
XXS
160		 8.625 825/32 7.981
7.813
7.625
7.439
7.189
7.001
6.875
6.813		 8.020
7.873
7.709
7.546
7.327
7.163
7.053
6.998		 0.322
0.406
0.500
0.594
0.719
0.812
0.875
0.906		 40
60
80
100
120
140
XXS
160		 8"
10" 40
60
80
100
120
140
160		 10.750 1015/16 10.020
9.750
9.564
9.314
9.064
8.750
8.500		 10.070
9.834
9.671
9.452
9.234
8.959
8.740		 0.365
0.500
0.594
0.719
0.844
1.000
1.125 		40
60
80
100
120
140
160		 10"
12" STD.
40
XS
60
80
100
120
140
160		 12.750 1231/32 12.00
11.938
11.750
11.626
11.376
11.064
10.750
10.500
10.125		 12.053
11.999
11.834
11.725
11.507
11.234
10.959
10.740
10.413		 0.375
0.406
0.500
0.562
0.688
0.844
1.000
1.125
1.312		 STD.
40
XS
60
80
100
120
140
160		 12"
14" STD.
40
XS
60
80
100
120
140
160		 14.000 141/4 13.250
13.124
13.000
12.814
12.500
12.126
11.814
11.500
11.188		 13.303
13.192
13.064
12.921
12.646
12.319
12.046
11.771
11.498		 0.375
0.438
0.500
0.594
0.750
0.938
1.094
1.250
1.406		 STD.
40
XS
60
80
100
120
140
160		 14"
16" STD.
40
60
80
100
120
140
160		 16.000 161/4 15.250
15.000
14.688
14.314
13.938
13.564
13.124
12.814		 15.303
15.084
14.811
14.484
14.155
13.827
13.442
13.171		 0.375
0.500
0.656
0.844
1.031
1.219
1.438
1.594		 STD.
40
60
80
100
120
140
160		 16"
18" 40
60
80
100
120
140
160		 18.000 189/32 16.876
16.500
16.126
15.688
15.250
14.876
14.438		 16.975
16.646
16.319
15.936
15.553
15.225
14.842		 0.562
0.750
0.938
1.156
1.375
1.562
1.781		 40
60
80
100
120
140
160		 18"
20" 40
60
80
100
120
140
160		 20.000 205/16 18.814
18.376
17.938
17.438
17.000
16.500
16.064		 18.921
18.538
18.155
17.717
17.334
16.896
16.515		 0.594
0.812
0.031
1.281
1.500
1.750
1.969		 40
60
80
100
120
140
160		 20"
24" 30
40
60
80
100
120
140
160		 24.000 243/8 22.876
22.626
22.064
21.564
20.938
20.378
19.876
19.314		 22.975
22.757
22.265
21.827
21.280
20.788
20.350
19.859		 0.562
0.688
0.969
1.219
1.531
1.812
2.062
2.344		 30
40
60
80
100
120
140
160		 24"
All Dimensions are given in Inches
STD. = Standard Wall Thickness.
XS = Extra Strong Wall Thickness.
XXS = Double Extra Strong Wall Thickness.