Pipe Size
(inches)

Outside Diameter
(inches)

Identification

Wall Thickness
- t -
(inches)

Inside Diameter
- d -
(inches)

Steel

Stainless Steel Schedule No.

Iron Pipe Size

Schedule No.

1/8

0.405

.
STD
XS

.
40
80

10S
40S
80S

.049
.068
.095

.307
.269
.215

1/4

0.540

.
STD
XS

.
40
80

10S
40S
80S

.065
.088
.119

.410
.364
.302

3/8

0.675

.
STD
XS

.
40
80

10S
40S
80S

.065
.091
.126

.545
.493
.423

1/2

0.840

.
.
STD
XS
.
XXS

.
.
40
80
160
.

5S
10S
40S
80S
.
.

.065
.083
.109
.147
.187
.294

.710
.674
.622
.546
.466
.252

3/4

1.050

.
.
STD
XS
.
XXS

.
.
40
80
160
.

5S
10S
40S
80S
.
.

.065
.083
.113
.154
.219
.308

.920
.884
.824
.742
.612
.434

1

1.315

.
.
STD
XS
.
XXS

.
.
40
80
160
.

5S
10S
40S
80S
.
.

.065
.109
.133
.179
.250
.358

1.185
1.097
1.049
.957
.815
.599

1 1/4

1.660

.
.
STD
XS
.
XXS

.
.
40
80
160
.

5S
10S
40S
80S
.
.

.065
.109
.140
.191
.250
.382

1.530
1.442
1.380
1.278
1.160
.896

1 1/2

1.900

.
.
STD
XS
.
XXS

.
.
40
80
160
.

5S
10S
40S
80S
.
.

.065
.109
.145
.200
.281
.400

1.770
1.682
1.610
1.500
1.338
1.100

2

2.375

.
.
STD
XS
.
XXS

.
.
40
80
160
.

5S
10S
40S
80S
.
.

.065
.109
.154
.218
.344
.436

2.245
2.157
2.067
1.939
1.687
1.503

2 1/2

2.875

.
.
STD
XS
.
XXS

.
.
40
80
160
.

5S
10S
40S
80S
.
.

.083
.120
.203
.276
.375
.552

2.709
2.635
2.469
2.323
2.125
1.771

3

3.500

.
.
STD
XS
.
XXS

.
.
40
80
160
.

5S
10S
40S
80S
.
.

.083
.120
.216
.300
.438
.600

3.334
3.260
3.068
2.900
2.624
2.300

3 1/2

4.000

.
.
STD
XS

.
.
40
80

5S
10S
40S
80S

.083
.120
.226
.318

3.834
3.760
3.548
3.364

4

4.500

.
.
STD
XS
.
.
XXS

.
.
40
80
120
160
.

5S
10S
40S
80S
.
.
.

.083
.120
.237
.337
.438
.531
.674

4.334
4.260
4.026
3.826
3.624
3.438
3.152

5

5.563

.
.
STD
XS
.
.
XXS

.
.
40
80
120
160
.

5S
10S
40S
80S
.
.
.

.109
.134
.258
.375
.500
.625
.750

5.345
5.295
5.047
4.813
4.563
4.313
4.063

6

6.625

.
.
STD
XS
.
.
XXS

.
.
40
80
120
160
.

5S
10S
40S
80S
.
.
.

.109
.134
.280
.432
.562
.718
.864

6.407
6.357
6.065
5.761
5.501
5.187
4.897

8

8.625

.
.
.
.
STD
.
XS
.
.
.
XXS
.

.
.
20
30
40
60
80
100
120
140
.
160

5S
10S
.
.
40S
.
80S
.
.
.
.
.

.109
.148
.250
.277
.322
.406
.500
.594
.719
.812
.875
.906

8.407
8.329
8.125
8.071
7.981
7.813
7.625
7.437
7.187
7.001
6.875
6.813

10

10.750

.
.
.
.
STD
XS
.
.
.
.
.

.
.
20
30
40
60
80
100
120
140
160

5S
10S
.
.
40S
80S
.
.
.
.
.

.134
.165
.250
.307
.365
.500
.594
.719
.844
1.000
1.125

10.482
10.420
10.250
10.136
10.020
9.750
9.562
9.312
9.062
8.750
8.500

12

12.75

.
.
.
.
STD
.
XS
.
.
.
.
.
.

.
.
20
30
.
40
.
60
80
100
120
140
160

5S
10S
.
.
40S
.
80S
.
.
.
.
.
.

.156
.180
.250
.330
.375
.406
.500
.562
.688
.844
1.000
1.125
1.312

12.438
12.390
12.250
12.090
12.000
11.938
11.750
11.626
11.374
11.062
10.750
10.500
10.126

14

14.00

.
.
.
.
STD
.
XS
.
.
.
.
.
..

.
.
10
20
30
40
.
60
80
100
120
140
160

5S
10S
.
.
.
.
.
.
.
.
.
.
.

156
.188
.250
.312
.375
.438
.500
.594
.750
.938
1.094
1.250
1.406

13.688
13.624
13.500
13.376
13.250
13.124
13.000
12.812
12.500
12.124
11.812
11.500
11.188

16

16.00

.
.
.
.
STD
XS
.
.
.
.
.
.

.
.
10
20
30
40
60
80
100
120
140
160

5S
10S
.
.
.
.
.
.
.
.
.
.

.165
.188
.250
.312
.375
.500
.656
.844
1.031
1.219
1.438
1.594

15.670
15.624
15.500
15.376
15.250
15.000
14.688
14.312
13.938
13.562
13.124
12.812

18

18.00

.
.
.
.
STD
.
XS
.
.
.
.
.
.
.

.
.
10
20
.
30
.
40
60
80
100
120
140
160

5S
10S
.
.
.
.
.
.
.
.
.
.
.
.

.165
.188
.250
.312
.375
.438
.500
.562
.750
.938
1.156
1.375
1.562
1.781

17.670
17.624
17.500
17.376
17.250
17.124
17.000
16.876
16.500
16.124
15.688
15.250
14.876
14.438