Offshore Diver

Converting pipe schedule to wall thickness in inches
The usual stipulation applies - this is just a page on the internet. This is believed correct, but we are still missing some numbers. Double check your work.

 

NPS 1/8 to NPS 3-1/2

NPS

DN

OD (inches)

Wall Thickness (inches)

SCH 5

SCH 10

SCH 30

SCH 40

SCH 80

SCH 120

SCH 160

1/8

6

0.405

0.035

0.049

0.057

0.068

0.095

    

3/16

7

                

1/4

8

0.540

0.049

0.065

.073

.088

.119

  

 

3/8

10

0.675

.049

.065

.073

.091

.126

    

1/2

15

0.840

.065

.083

.095

.109

.147

.170

.188

5/8

18

                

3/4

20

1.050

.065

.083

.095

.113

.154

.170

.219

1

25

1.315

.065

.109

.114

.133

.179

.200

.250

1-1/4

32

1.660

.065

.109

.117

.140

.191

.215

.250

1-1/2

40

1.900

.065

.109

.125

.145

.200

.225

.281

2

50

2.375

.065

.109

  

.154

.218

.250

.344

2-1/2

65

2.875

.083

.120

  

.203

.276

.300

.375

3

80

3.500

.083

.120

  

.216

.300

.350

.438

3-1/2

90

4.000

.083

.120

  

.226

.318

    

 

NPS 4 to NPS 8

NPS

DN

OD (inches)

Wall Thickness (inches)

SCH 5

SCH 10

SCH 20

SCH 30

SCH 40

SCH 60

SCH 80

SCH 100

SCH 120

SCH 140

SCH 160

4

100

4.500

.083

.120

    

.237

.281

.337

  

.437

  

.531

4-1/2

115

5.000

        

.247

  

.355

        

5

125

5.563

.109

.134

    

.258

  

.375

  

.500

  

.625

6

150

6.625

.109

.134

    

.280

  

.432

  

.562

  

.719

8

200

8.625

.109

.148

.250

.277

.322

.406

.500

.593

.718

.812

.906

 

NPS 10 to NPS 24

NPS

DN

OD (inches)

Wall Thickness (inches)

SCH 5s

SCH 5

SCH 10s

SCH 10

SCH 20

SCH 30

SCH 40s

SCH 40

SCH 60

SCH 80s

SCH 80

SCH 100

SCH 120

SCH 140

SCH 160

10

250

10.75

.134

.134

.165

.165

.250

.307

.365

.365

.500

.500

.593

.718

.843

1.000

1.125

12

300

12.75

.156

.165

.180

.180

.250

.330

.375

.406

.500

.500

.687

.843

1.000

1.125

1.312

14

350

14.00

.156

 

.188

.250

.312

.375

.375

.437

.593

.500

.750

.937

1.093

1.250

1.406

16

400

16.00

.165

 

.188

.250

.312

.375

.375

.500

.656

.500

.843

1.031

1.218

1.437

1.593

18

450

18.00

.165

 

.188

.250

.312

.437

.375

.562

.750

.500

.937

1.156

1.375

1.562

1.781

20

500

20.00

.188

 

.218

.250

.375

.500

.375

.593

.812

.500

1.031

1.280

1.500

1.750

1.968

24

600

24.00

.218

 

.250

.250

.375

.562

.375

.687

.968

.500

1.218

1.531

1.812

2.062

2.343