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Metric Pipe Sizes Dn vs NPS

Fluids Flow Design and Engineering

Metric Pipe Sizes Dn "Diametre Nominel" per ISO vs NPS "Nominal Pipe Size" Equivalent for DN 6 to DN 2200, NPS Schedule 40S to XS / XH

etric Pipe Sizes Dn

Welded and Seamless Pipe

NPS

DN

OD
in
(mm)

Wall Thickness
Inches
(mm)

Sch 40S

STD

Sch 40

Sch 60

Sch 80S

XS / XH

1/8”

6

0.404
(10.26)

0.068
(1.727)

0.068
(1.727)

0.068
(1.727)

--

0.095
(2.413)

0.095
(2.413)

1/4”

8

0.540
(13.72)

0.088
(2.235)

0.088
(2.235)

0.088
(2.235)

--

0.119
(3.023)

0.119
(3.023)

3/8”

10

0.675
(17.15)

0.091
(2.311)

0.091
(2.311)

0.091
(2.311)

--

0.126
(3.200)

0.126
(3.200)

1/2”

15

0.840
(21.34)

0.109
(2.769)

0.109
(2.769)

0.109
(2.769)

--

0.147
(3.734)

0.147
(3.734)

3/4”

20

1.050
(26.67)

0.113
(2.870)

0.113
(2.870)

0.113
(2.870)

--

0.154
(3.912)

0.154
(3.912)

1”

25

1.315
(33.40)

0.133
(3.378)

0.133
(3.378)

0.133
(3.378)

--

0.179
(4.547)

0.179
(4.547)

1-1/4”

32

1.660
(42.16)

0.140
(3.556)

0.140
(3.556)

0.140
(3.556)

--

0.191
(4.851)

0.191
(4.851)

1-1/2”

40

1.900
(48.26)

0.145
(3.683)

0.145
(3.683)

0.145
(3.683)

--

0.200
(5.080)

0.200
(5.080)

2”

50

2.375
(60.33)

0.154
(3.912)

0.154
(3.912)

0.154
(3.912)

--

0.218
(5.537)

0.218
(5.537)

2-1/2”

65

2.875
(73.03)

0.203
(5.156)

0.203
(5.156)

0.203
(5.156)

--

0.276
(7.010)

0.276
(7.010)

3”

80

3.500
(88.90)

0.216
(5.486)

0.216
(5.486)

0.216
(5.486)

--

0.300
(7.620)

0.300
(7.620)

3-1/2”

90

4.000
(101.60)

0.226
(5.740)

0.226
(5.740)

0.226
(5.740)

--

0.318
(8.077)

0.318
(8.077)

4”

100

4.500
(114.30)

0.237
(6.020)

0.237
(6.020)

0.237
(6.020)

--

0.337
(8.560)

0.337
(8.560)

4-1/2”

115

5.000
(127.00)

0.247
(6.274)

0.247
(6.274)

0.247
(6.274)

--

0.355
(9.017)

0.355
(9.017)

5”

125

5.563
(141.30)

0.258
(6.553)

0.258
(6.553)

0.258
(6.553)

--

0.375
(9.525)

0.375
(9.525)

6”

150

6.625
(168.28)

0.280
(7.112)

0.280
(7.112)

0.280
(7.112)

--

0.432
(10.973)

0.432
(10.973)

7”

--

7.625
(193.68)

0.301
(7.645)

0.301
(7.645)

0.301
(7.645)

--

0.500
(12.700)

0.500
(12.700)

8”

200

8.625
(219.08)

0.322
(8.179)

0.322
(8.179)

0.322
(8.179)

0.406
(10.312)

0.500
(12.700)

0.500
(12.700)

9”

--

9.625
(244.48)

0.342
(8.687)

0.342
(8.687)

0.342
(8.687)

--

0.500
(12.700)

0.500
(12.700)

10”

250

10.75
(273.05)

0.365
(9.271)

0.365
(9.271)

0.365
(9.271)

0.500
(12.700)

0.500
(12.700)

0.500
(12.700)

12”

300

12.75
(323.85)

0.375
(9.525)

0.375
(9.525)

0.406
(10.312)

0.562
(14.275)

0.500
(12.700)

0.500
(12.700)

14”

350

14.00
(355.60)

0.375
(9.525)

0.375
(9.525)

0.437
(11.100)

0.593
(15.062)

0.500
(12.700)

0.500
(12.700)

16”

400

16.00
(406.40)

0.375
(9.525)

0.375
(9.525)

0.500
(12.700)

0.656
(16.662)

0.500
(12.700)

0.500
(12.700)

18”

450

18.00
(457.20)

0.375
(9.525)

0.375
(9.525)

0.562
(14.275)

0.750
(19.050)

0.500
(12.700)

0.500
(12.700)

20”

500

20.00
(508.00)

0.375
(9.525)

0.375
(9.525)

0.593
(15.062)

0.812
(20.625)

0.500
(12.700)

0.500
(12.700)

22”

550

22.00
(558.80)

0.375
(9.525)

0.375
(9.525)

--

0.875
(22.225)

0.500
(12.700)

0.500
(12.700)

24”

600

24.00
(609.60)

0.375
(9.525)

0.375
(9.525)

0.687
(17.450)

0.968
(24.587)

0.500
(12.700)

0.500
(12.700)

26”

650

26.00
(660.40)

0.375
(9.525)

--

--

--

--

--

28”

700

28.00
(711.20)

0.375
(9.525)

--

--

--

--

--

30”

750

30.00
(762.00)

0.375
(9.525)

--

--

--

--

--

32”

800

32.00
(812.80)

0.375
(9.525)

--

0.688
(17.475)

--

--

--

34”

850

34.00
(863.60)

0.375
(9.525)

--

0.688
(17.475)

--

--

--

36”

900

36.00
(914.40)

0.375
(9.525)

--

--

--

--

--

40”

1000

40.00
(1106.00)

--

0.375
(9.525)

--

--

--

0.500
(12.700)

42”

1050

42.00
(1066.80)

--

0.375
(9.525)

--

--

--

0.500
(12.700)

44”

1100

44.00
(1117.60)

--

0.375
(9.525)

--

--

--

0.500
(12.700)

46”

1150

46.00
(1168.40)

--

0.375
(9.525)

--

--

--

0.500
(12.700)

48”

1200

48.00
(1219.20)

--

0.375
(9.525)

--

--

--

0.500
(12.700)

52”

1300

52.00
(1320.80)

--

?

--

--

--

?

56”

1400

56.00
(1422.40)

--

?

--

--

--

?

60”

1500

60.00
(1524.00)

--

?

--

--

--

?

64”

1600

64.00
(1625.60)

--

?

--

--

--

?

68”

1700

68.00
(1727.20)

--

?

--

--

--

?

72”

1800

72.00
(1828.80)

--

?

--

--

--

?

76’

1900

76.00
(1930.40)

--

?

--

--

--

?

80”

2000

80.00
(2032.00)

--

?

--

--

--

?

88”

2200

88.00
(2235.20)

--

?

--

--

--

?

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