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Table B5. Air Conditioning and Refrigeration Field Service 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
External
surface
sq. ft. per
linear ft.
Internal
surface
sq. ft. per
linear ft.
Weight
of Tube
only
pounds per
linear ft.
Contents of tube
per linear ft
1/8
A
.125
.065
.030
.00332
.0327
.0170
.0347
.00002
3/16
A
.187
.128
.030
.0129
.0492
.0335
.0575
.00009
1/4
A
.250
.190
.030
.0284
.0655
.0497
.0804
.00020
5/16
A
.312
.248
.032
.0483
.0817
.0649
.109
.00034
3/8
A
.375
.311
.032
.076
.0982
.0814
.134
.00053
D
.375
.315
.030
.078
.0982
.0821
.126
.00054
1/2
A
.500
.436
.032
.149
.131
.114
.182
.00103
D
.500
.430
.035
.145
.131
.113
.198
.00101
5/8
A
.625
.555
.035
.242
.164
.145
.251
.00168
D
.625
.545
.040
.233
.164
.143
.285
.00162
3/4
A
.750
.680
.035
.363
.196
.178
.305
.00252
A
.750
.666
.042
.348
.196
.174
.362
.00242
D
.750
.666
.042
.348
.196
.174
.362
.00242
7/8
A
.875
.785
.045
.484
.229
.206
.455
.00336
D
.875
.785
.045
.484
.229
.206
.455
.00336
1 1/8
A
1.125
1.025
.050
.825
.294
.268
.655
.00573
D
1.125
1.025
.050
.825
.294
.268
.655
.00573
1 3/8
A
1.375
1.265
.055
1.26
.360
.331
.884
.00875
D
1.375
1.265
.055
1.26
.360
.331
.884
.00875
1 5/8
A
1.625
1.505
.060
1.78
.425
.394
1.14
.0124
D
1.625
1.505
.060
1.78
.425
.394
1.14
.0124
2 1/8
D
2.125
1.985
.070
3.09
.556
.520
1.75
.0215
2 5/8
D
2.625
2.465
.080
4.77
.687
.645
2.48
.0331
3 1/8
D
3.125
2.954
.090
6.81
.818
.771
3.33
.0473
3 5/8
D
3.625
3.425
.100
9.21
.949
.897
4.29
.0640
41/8
D
4.125
3.905
.110
12.0
1.08
1.02
5.38
.0833

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