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Table B6. Medical gas, K & L - Dimensions and physical characteristics

Nominal
or
Standard
Size,
inches
Nominal dimensions, inches
Calculated values (based on nominal dimensions)
Outside
diameter
Inside
diameter
Wall
thickness
Cross
sectional
area of
bore,
sq. inches
Internal
surface
sq. ft. per
linear ft.
Weight
of Tube
only
pounds
per
linear ft.
Contents of tube
per linear ft
1/4
K
.375
.305
.035
.073
.0789
.145
.00051
L
.375
.315
.030
.078
.0825
.126
.00054
3/8
K
.500
.402
.049
.127
.105
.269
.00088
L
.500
.430
.035
.145
.113
.198
.00101
1/2
K
.625
.527
.049
.218
.130
.344
.00151
L
.625
.545
.040
.233
.143
.285
.00162
5/8
K
.750
.652
.049
.334
.171
.418
.00232
L
.750
.666
.042
.348
.174
.362
.00242
3/4
K
.875
.745
.065
.436
.195
.641
.00303
L
.875
.785
.045
.484
.206
.455
.00336
1
K
1.125
.995
.065
.778
.261
.839
.00540
L
1.125
1.025
.050
.825
.268
.655
.00573
1 1/4
K
1.375
1.245
.065
1.222
.326
1.04
.00845
L
1.375
1.265
.055
1.26
.331
.884
.00873
1 1/2
K
1.625
1.481
.072
1.72
.388
1.36
.0120
L
1.625
1.505
.060
1.78
.394
1.14
.0124
2
K
2.125
1.959
.083
3.01
.522
2.06
.0209
L
2.125
1.985
.070
3.09
.520
1.75
.0215
2 1/2
K
2.625
2.435
.095
4.66
.638
2.93
.0323
L
2.625
2.465
.080
4.77
.645
2.48
.0331
3
K
3.125
2.907
.109
6.64
.761
4.00
.0461
L
3.125
2.945
.090
6.81
.761
3.33
.0473
3 1/2
K
3.625
3.385
.120
9.00
.886
5.12
.0625
L
3.625
3.425
.100
9.21
.897
4.29
.0640
4
K
4.125
3.857
.134
11.7
1.01
6.51
.0811
L
4.125
3.905
.110
12.0
1.02
5.38
.0832
5
K
5.125
4.805
.160
18.1
1.26
9.67
.126
L
5.125
4.875
.125
18.7
1.28
7.61
.130
6
K
6.125
5.741
.192
25.9
1.50
13.9
.180
L
6.125
5.854
.140
26.8
1.53
10.2
.186
8
K
8.125
7.583
.271
45.2
1.99
25.9
.314
L
8.125
7.725
.200
46.9
2.02
19.3
.325

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