Pipework - Nominal Bore Pipe Sizes
Nominal Bore Pipe SizesEdit
NPS/NB
|
DN
|
[in (mm)]
|
SCH 5s
|
SCH 5
|
SCH 10s
|
SCH 10
|
SCH 20
|
SCH 30
|
SCH 40s/STD
|
SCH 40
|
SCH 60
|
SCH 80s
|
SCH 80
|
SCH 100
|
SCH 120
|
SCH 140
|
SCH 160
|
XS
|
XXS
|
⅛
|
6
|
0.404 (10.26)
|
0.035 (0.889)
|
|
0.049 (1.245)
|
|
0.049 (1.245)
|
0.057 (1.448)
|
0.068 (1.727)
|
0.068 (1.727)
|
—
|
0.095 (2.413)
|
0.095 (2.413)
|
—
|
—
|
—
|
—
|
0.095 (2.413)
|
—
|
¼
|
8
|
0.540 (13.72)
|
0.049 (1.245)
|
|
0.065 (1.651)
|
|
0.065 (1.651)
|
0.073 (1.854)
|
0.088 (2.235)
|
0.088 (2.235)
|
—
|
0.119 (3.023)
|
0.119 (3.023)
|
—
|
—
|
—
|
—
|
0.119 (3.023)
|
—
|
⅜
|
10
|
0.675 (17.15)
|
0.049 (1.245)
|
|
0.065 (1.651)
|
|
0.065 (1.651)
|
0.073 (1.854)
|
0.091 (2.311)
|
0.091 (2.311)
|
—
|
0.126 (3.200)
|
0.126 (3.200)
|
—
|
—
|
—
|
—
|
0.126 (3.200)
|
—
|
½
|
15
|
0.840 (21.34)
|
0.065 (1.651)
|
|
0.083 (2.108)
|
|
0.083 (2.108)
|
0.095 (2.413)
|
0.109 (2.769)
|
0.109 (2.769)
|
—
|
0.147 (3.734)
|
0.147 (3.734)
|
—
|
—
|
—
|
0.188 (4.775)
|
0.147 (3.734)
|
0.294 (7.468)
|
¾
|
20
|
1.050 (26.67)
|
0.065 (1.651)
|
|
0.083 (2.108)
|
|
0.083 (2.108)
|
0.095 (2.413)
|
0.113 (2.870)
|
0.113 (2.870)
|
—
|
0.154 (3.912)
|
0.154 (3.912)
|
—
|
—
|
—
|
0.219 (5.563)
|
0.154 (3.912)
|
0.308 (7.823)
|
1
|
25
|
1.315 (33.40)
|
0.065 (1.651)
|
|
0.109 (2.769)
|
|
0.109 (2.769)
|
0.114 (2.896)
|
0.133 (3.378)
|
0.133 (3.378)
|
—
|
0.179 (4.547)
|
0.179 (4.547)
|
—
|
—
|
—
|
0.250 (6.350)
|
0.179 (4.547)
|
0.358 (9.093)
|
1¼
|
32
|
1.660 (42.16)
|
0.065 (1.651)
|
|
0.109 (2.769)
|
|
0.109 (2.769)
|
0.117 (2.972)
|
0.140 (3.556)
|
0.140 (3.556)
|
—
|
0.191 (4.851)
|
0.191 (4.851)
|
—
|
—
|
—
|
0.250 (6.350)
|
0.191 (4.851)
|
0.382 (9.703)
|
1½
|
40
|
1.900 (48.26)
|
0.065 (1.651)
|
|
0.109 (2.769)
|
|
0.109 (2.769)
|
0.125 (3.175)
|
0.145 (3.683)
|
0.145 (3.683)
|
—
|
0.200 (5.080)
|
0.200 (5.080)
|
—
|
—
|
—
|
0.281 (7.137)
|
0.200 (5.080)
|
0.400 (10.160)
|
2
|
50
|
2.375 (60.33)
|
0.065 (1.651)
|
|
0.109 (2.769)
|
|
0.109 (2.769)
|
0.125 (3.175)
|
0.154 (3.912)
|
0.154 (3.912)
|
—
|
0.218 (5.537)
|
0.218 (5.537)
|
—
|
0.250 (6.350)
|
—
|
0.344 (8.738)
|
0.218 (5.537)
|
0.436 (11.074)
|
2½
|
65
|
2.875 (73.03)
|
0.083 (2.108)
|
|
0.120 (3.048)
|
|
0.120 (3.048)
|
0.188 (4.775)
|
0.203 (5.156)
|
0.203 (5.156)
|
—
|
0.276 (7.010)
|
0.276 (7.010)
|
—
|
0.300 (7.620)
|
—
|
0.375 (9.525)
|
0.276 (7.010)
|
0.552 (14.021)
|
3
|
80
|
3.500 (88.90)
|
0.083 (2.108)
|
|
0.120 (3.048)
|
|
0.120 (3.048)
|
0.188 (4.775)
|
0.216 (5.486)
|
0.216 (5.486)
|
—
|
0.300 (7.620)
|
0.300 (7.620)
|
—
|
0.350 (8.890)
|
—
|
0.438 (11.125)
|
0.300 (7.620)
|
0.600 (15.240)
|
3½
|
90
|
4.000 (101.60)
|
0.083 (2.108)
|
|
0.120 (3.048)
|
|
0.120 (3.048)
|
0.188 (4.775)
|
0.226 (5.740)
|
0.226 (5.740)
|
—
|
0.318 (8.077)
|
0.318 (8.077)
|
—
|
—
|
—
|
—
|
0.318 (8.077)
|
0.636 (16.154)
|
4
|
100
|
4.500 (114.30)
|
|
0.083 (2.108)
|
0.120 (3.048)
|
0.120 (3.048)
|
—
|
0.188 (4.775)
|
0.237 (6.020)
|
0.237 (6.020)
|
—
|
0.337 (8.560)
|
0.337 (8.560)
|
—
|
0.437 (11.100)
|
—
|
0.531 (13.487)
|
0.337 (8.560)
|
0.674 (17.120)
|
4½
|
115
|
5.000 (127.00)
|
|
—
|
—
|
—
|
—
|
—
|
0.247 (6.274)
|
0.247 (6.274)
|
—
|
0.355 (9.017)
|
0.355 (9.017)
|
—
|
—
|
—
|
—
|
0.355 (9.017)
|
0.710 (18.034)
|
5
|
125
|
5.563 (141.30)
|
|
0.109 (2.769)
|
0.134 (3.404)
|
0.134 (3.404)
|
—
|
—
|
0.258 (6.553)
|
0.258 (6.553)
|
—
|
0.375 (9.525)
|
0.375 (9.525)
|
—
|
0.500 (12.700)
|
—
|
0.625 (15.875)
|
0.375 (9.525)
|
0.750 (19.050)
|
6
|
150
|
6.625 (168.28)
|
|
0.109 (2.769)
|
0.134 (3.404)
|
0.134 (3.404)
|
—
|
—
|
0.280 (7.112)
|
0.280 (7.112)
|
—
|
0.432 (10.973)
|
0.432 (10.973)
|
—
|
0.562 (14.275)
|
—
|
0.719 (18.263)
|
0.432 (10.973)
|
0.864 (21.946)
|
7
|
—
|
7.625 (193.68)
|
|
—
|
—
|
—
|
—
|
—
|
0.301 (7.645)
|
0.301 (7.645)
|
—
|
0.500 (12.700)
|
0.500 (12.700)
|
—
|
—
|
—
|
—
|
0.500 (12.700)
|
0.875 (22.225)
|
8
|
200
|
8.625 (219.08)
|
|
0.109 (2.769)
|
0.148 (3.759)
|
0.148 (3.759)
|
0.250 (6.350)
|
0.277 (7.036)
|
0.322 (8.179)
|
0.322 (8.179)
|
0.406 (10.312)
|
0.500 (12.700)
|
0.500 (12.700)
|
0.593 (15.062)
|
0.719 (18.263)
|
0.812 (20.625)
|
0.906 (23.012)
|
0.500 (12.700)
|
0.875 (22.225)
|
9
|
—
|
9.625 (244.48)
|
|
—
|
—
|
—
|
—
|
—
|
0.342 (8.687)
|
0.342 (8.687)
|
—
|
0.500 (12.700)
|
0.500 (12.700)
|
—
|
—
|
—
|
—
|
0.500 (12.700)
|
—
|
10
|
250
|
10.75 (273.05)
|
0.134 (3.404)
|
0.134 (3.404)
|
0.165 (4.191)
|
0.165 (4.191)
|
0.250 (6.350)
|
0.307 (7.798)
|
0.365 (9.271)
|
0.365 (9.271)
|
0.500 (12.700)
|
0.500 (12.700)
|
0.593 (15.062)
|
0.718 (18.237)
|
0.843 (21.412)
|
1.000 (25.400)
|
1.125 (28.575)
|
—
|
—
|
12
|
300
|
12.75 (323.85)
|
0.156 (3.962)
|
0.156 (3.962)
|
0.180 (4.572)
|
0.180 (4.572)
|
0.250 (6.350)
|
0.330 (8.382)
|
0.375 (9.525)
|
0.406 (10.312)
|
0.562 (14.275)
|
0.500 (12.700)
|
0.687 (17.450)
|
0.843 (21.412)
|
1.000 (25.400)
|
1.125 (28.575)
|
1.312 (33.325)
|
—
|
—
|
14
|
350
|
14.00 (355.60)
|
0.156 (3.962)
|
0.156 (3.962)
|
0.188 (4.775)
|
0.250 (6.350)
|
0.312 (7.925)
|
0.375 (9.525)
|
0.375 (9.525)
|
0.437 (11.100)
|
0.593 (15.062)
|
0.500 (12.700)
|
0.750 (19.050)
|
0.937 (23.800)
|
1.093 (27.762)
|
1.250 (31.750)
|
1.406 (35.712)
|
—
|
—
|
16
|
400
|
16.00 (406.40)
|
0.165 (4.191)
|
0.165 (4.191)
|
0.188 (4.775)
|
0.250 (6.350)
|
0.312 (7.925)
|
0.375 (9.525)
|
0.375 (9.525)
|
0.500 (12.700)
|
0.656 (16.662)
|
0.500 (12.700)
|
0.843 (21.412)
|
1.031 (26.187)
|
1.218 (30.937)
|
1.437 (36.500)
|
1.593 (40.462)
|
—
|
—
|
18
|
450
|
18.00 (457.20)
|
0.165 (4.191)
|
0.165 (4.191)
|
0.188 (4.775)
|
0.250 (6.350)
|
0.312 (7.925)
|
0.437 (11.100)
|
0.375 (9.525)
|
0.562 (14.275)
|
0.750 (19.050)
|
0.500 (12.700)
|
0.937 (23.800)
|
1.156 (29.362)
|
1.375 (34.925)
|
1.562 (39.675)
|
1.781 (45.237)
|
—
|
—
|
20
|
500
|
20.00 (508.00)
|
0.188 (4.775)
|
0.188 (4.775)
|
0.218 (5.537)
|
0.250 (6.350)
|
0.375 (9.525)
|
0.500 (12.700)
|
0.375 (9.525)
|
0.593 (15.062)
|
0.812 (20.625)
|
0.500 (12.700)
|
1.031 (26.187)
|
1.280 (32.512)
|
1.500 (38.100)
|
1.750 (44.450)
|
1.968 (49.987)
|
—
|
—
|
22
|
550
|
22.00 (558.80)
|
0.188 (4.775)
|
0.188 (4.775)
|
0.218 (5.537)
|
0.250 (6.350)
|
0.375 (9.525)
|
0.500 (12.700)
|
0.375 (9.525)
|
—
|
0.875 (22.225)
|
0.500 (12.700)
|
1.125 (28.575)
|
1.375 (34.925)
|
1.625 (41.275)
|
1.875 (47.625)
|
2.125 (53.975)
|
—
|
—
|
24
|
600
|
24.00 (609.60)
|
0.218 (5.537)
|
0.218 (5.537)
|
0.250 (6.350)
|
0.250 (6.350)
|
0.375 (9.525)
|
0.562 (14.275)
|
0.375 (9.525)
|
0.687 (17.450)
|
0.968 (24.587)
|
0.500 (12.700)
|
1.218 (30.937)
|
1.531 (38.887)
|
1.812 (46.025)
|
2.062 (52.375)
|
2.343 (59.512)
|
—
|
—
|
26
|
650
|
26.000 (660.400)
|
—
|
|
—
|
0.312 (7.925)
|
0.500 (12.700)
|
—
|
0.375 (9.525)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
28
|
700
|
28.000 (711.200)
|
—
|
|
?
|
0.312 (7.925)
|
0.500 (12.700)
|
0.625 (15.875)
|
0.375 (9.525)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
30
|
750
|
30.000 (762.000)
|
0.250 (6.350)
|
|
0.312 (7.925)
|
0.312 (7.925)
|
0.500 (12.700)
|
0.625 (15.875)
|
0.375 (9.525)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
32
|
800
|
32.000 (812.800)
|
—
|
|
—
|
0.312 (7.925)
|
0.500 (12.700)
|
0.625 (15.875)
|
0.375 (9.525)
|
0.688 (17.475)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
34
|
850
|
34.000 (863.600)
|
—
|
|
—
|
0.312 (7.925)
|
0.500 (12.700)
|
0.625 (15.875)
|
0.375 (9.525)
|
0.688 (17.475)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
36
|
900
|
36.000 (914.400)
|
—
|
|
—
|
0.312 (7.925)
|
0.500 (12.700)
|
—
|
0.375 (9.525)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
40
|
1000
|
40.000 (1,016.000)
|
—
|
—
|
—
|
—
|
—
|
—
|
0.375 (9.525)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
0.500 (12.700)
|
1.000 (25.400)
|
42
|
1050
|
42.000 (1,066.800)
|
—
|
—
|
—
|
—
|
—
|
—
|
0.375 (9.525)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
0.500 (12.700)
|
1.000 (25.400)
|
44
|
1100
|
44.000 (1,117.600)
|
—
|
—
|
—
|
—
|
—
|
—
|
0.375 (9.525)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
0.500 (12.700)
|
1.000 (25.400)
|
46
|
1150
|
46.000 (1,168.400)
|
—
|
—
|
—
|
—
|
—
|
—
|
0.375 (9.525)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
0.500 (12.700)
|
1.000 (25.400)
|
48
|
1200
|
48.000 (1,219.200)
|
—
|
—
|
—
|
—
|
—
|
—
|
0.375 (9.525)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
0.500 (12.700)
|
1.000 (25.400)
|
52
|
1300
|
52.000 (1,320.800)
|
—
|
—
|
—
|
—
|
—
|
—
|
0.375 (9.525)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
0.500 (12.700)
|
1.000 (25.400)
|
56
|
1400
|
56.000 (1,422.400)
|
—
|
—
|
—
|
—
|
—
|
—
|
0.375 (9.525)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
0.500 (12.700)
|
1.000 (25.400)
|
60
|
1500
|
60.000 (1,524.000)
|
—
|
—
|
—
|
—
|
—
|
—
|
0.375 (9.525)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
0.500 (12.700)
|
1.000 (25.400)
|
64
|
1600
|
64.000 (1,625.600)
|
—
|
—
|
—
|
—
|
—
|
—
|
0.375 (9.525)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
0.500 (12.700)
|
1.000 (25.400)
|
68
|
1700
|
68.000 (1,727.200)
|
—
|
—
|
—
|
—
|
—
|
—
|
0.375 (9.525)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
0.500 (12.700)
|
1.000 (25.400)
|
72
|
1800
|
72.000 (1,828.800)
|
—
|
—
|
—
|
—
|
—
|
—
|
0.375 (9.525)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
0.500 (12.700)
|
1.000 (25.400)
|
76
|
1900
|
76.000 (1,930.400)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
80
|
2000
|
80.000 (2,032.000)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
88
|
2200
|
88.000 (2,235.200)
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|
—
|