Welcome to Unity Tube, Inc.


Finning, Bending, Coiling,& Fabricating

O.D.
TUBE
FIN
HEIGHT
FIN
O.D.
AVERAGE OUTSIDE SURFACE AREA
(Sq. Ft. per Lineal Foot of Tube)
Number of Fins per Inch of Length
 
 
 
4
5
6
7
8
9
10
11
12
14
0.375
0.125
0.625
 
0.267
0.300
0.334
0.369
0.403
0.437
0.471
0.505
0.573
 
0.250
0.875
 
0.517
0.600
0.684
0.768
0.853
0.937
1.021
1.105
1.273
 
0.312
1.000
 
0.673
0.788
0.902
1.017
1.132
1.247
1.362
1.477
1.703
0.500
0.125
0.750
 
0.340
0.382
0.424
0.466
0.508
0.550
0.592
0.634
0.718
 
0.250
1.000
 
0.632
0.731
0.834
0.935
1.036
1.137
1.238
1.339
1.514
 
0.312
1.125
 
0.808
0.943
1.080
1.216
1.352
1.488
1.624
1.760
2.032
 
0.375
1.250
 
1.005
1.179
1.335
1.530
1.705
1.880
2.005
2.230
 
0.625
0.250
1.125
0.630
0.746
0.862
0.978
1.094
1.210
1.326
1.442
1.558
1.790
 
0.312
1.250
0.787
0.943
1.099
1.255
1.411
1.567
1.723
1.879
2.035
2.347
 
0.375
1.375
0.961
1.160
1.359
1.558
1.757
1.956
2.155
2.354
2.553
2.951
 
0.438
1.500
1.151
1.398
1.645
1.892
2.139
2.386
2.633
2.880
3.127
 
0.750
.0250
1.250
0.728
0.861
0.993
1.127
1.260
1.393
1.526
1.659
1.792
2.058
 
0.312
1.375
0.902
1.078
1.254
1.430
1.606
1.782
1.958
2.134
2.310
2.662
 
0.375
1.500
1.092
1.316
1.539
1.764
1.988
2.212
2.436
2.660
2.884
3.332
 
0.438
1.625
1.298
1.574
1.849
2.126
2.402
2.678
2.954
3.230
3/506
4/058
 
0.500
1.750
1.521
1.852
2.183
2.514
2.845
3/176
3.507
3.838
4.169
 
0.875
0.125
1.125
 
 
0.627
0.694
0.760
0.893
0.959
1.025
1.158
1.584
 
0.250
1.375
0.826
0.975
1.124
1.273
1.422
1.571
1.720
1.869
2.018
2.316
 
0.312
1.500
1.016
1.213
1.410
1.661
1.876
2.091
2.306
2.521
2.736
3.166
 
0.375
1.625
1.223
1.471
1.719
1.967
2.215
2.463
2.711
2.959
3.207
3.703
 
0.438
1.75
1.445
1.75
2.054
2.36
2.665
2.970
3.275
3.580
3.885
 
 
0.500
1.875
1.685
2.049
2.412
2.777
3.141
3.505
3.869
4.233
4.597
 
1.000
0.250
1.500
0.924
1.090
1.255
1.422
1.588
1.754
1.920
2.086
2.252
2.584
 
0.312
1.625
1.131
1.348
1.565
1.782
1.999
2.216
2.433
2.650
2.867
3.301
 
0.375
1.750
1.354
1.626
1.899
2.170
2.442
2.714
2.986
3.258
3.530
4.074
 
0.438
1.875
1.593
1.925
2.258
2.589
2.921
3.253
3.585
3.917
4.249
 
 
0.500
2.000
1.848
2.245
2.642
3.039
3.436
3.833
4.230
4.627
5.024
 
 
0.625
2.250
2.409
2.945
3.482
4.017
4.553
5.089
 
 
 
 
PIPE SIZES
0.750
0.250
1.550
0.968
1.141
1.315
1.490
1.663
1.863
2.009
2.182
2.355
 
(1.050")
0.312
1.675
1.182
1.409
1.636
1.863
2.090
2.317
2.554
2.771
2.998
 
 
0.375
1.800
1.413
1.697
1.981
2.265
2.549
2.833
3.117
3.401
3.865
 
 
0.438
1.925
1.660
2.006
2.352
2.698
3.044
3.390
3.736
4.082
4.428
 
 
0.500
2.050
1.923
2.335
2.747
3.159
3.571
3.983
4.395
 
 
 
 
0.625
2.300
2.498
3.055
3.610
4.166
4.723
5.280
 
 
 
 
1.000
0.375
2.065
1.690
2.027
2.363
2.701
3.038
3.375
3.712
4.049
4.386
 
(1.315")
0.438
2.190
1.972
2.379
2.786
3.193
3.600
4.007
4.414
4.821
5.228
 
 
0.500
2.315
2.270
2.752
3.232
3.716
4.198
4.680
5.162
5.644
6.126
 
 
0.625
2.565
2.915
3.558
4.200
4.841
5.487
6.130
 
 
 
 
 
0.750
2.815
3.626
4.446
5.266
6.086
6.906
7.726
 
 
 
 
1.250
0.500
2.660
2.722
3.293
3.865
4.435
5.006
5.577
6.148
6.719
7.290
 
(1.660")
0.625
2.910
3.457
4.213
4.968
5.722
6.477
7.232
 
 
 
 
 
0.750
3.160
4.258
5.214
6.170
7.126
8.082
9.038
 
 
 
 
1.500
0.500
2.900
3.036
3.670
4.305
4.941
5.576
6.211
6.846
7.481
8.116
 
(1.900")
0.625
3.150
3.834
4.668
5.502
6.336
7.170
8.004
 
 
 
 
 
0.750
3.400
4.698
5.748
6.798
7.848
8.898
9.948
 
 
 
 
 
0.875
3.650
5.627
6.909
8.192
9.473
10.755
12.037
 
 
 
 
2.000
0.500
3.375
3.658
4.417
5.176
5.935
6.698
7.453
8.212
8.971
9.730
 
(2.375")
0.625
3.625
4.580
5.570
6.559
7.550
8.540
9.530
 
 
 
 
 
0.750
3.875
5.568
6.805
8.041
9.279
10.516
11.753
 
 
 
 
 
0.875
4.125
6.621
8.122
9.622
11.124
12.625
14.126
 
 
 
 
 
1.000
4.375
7.741
9.520
11.300
13.081
14.861