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Dimensions and Physical Characteristics of Copper Tube : TYPE K

Norminal or
Standards Sizes
Outside
Diameter
inside
Diameter
Wall
Thickness
Safe Working
Pressure in
inch.
Working
Pressure
Hard Drawn
Weight
Nom Size
O.D Size
mm.
mm.
inch
mm.
p.s.l.T
(kg/cm2)
(Kg./M)
1/4
3/8
9.525
7.745
0.035
0.89
1595
111
0.216
3/8
1/2
12.700
10.22
0.049
1.24
1745
123
0.399
1/2
5/8
15.875
13.395
0.049
1.24
1375
95.3
0.509
5/8
3/4
19.050
16.57
0.049
1.24
1135
78.7
0.62
3/4
7/8
22.225
18.925
0.065
1.65
1315
90.8
0.953
1
1 1/8
28.575
25.275
0.065
1.65
1010
69.7
1.247
1 1/4
1 3/8
34.925
31.625
0.065
1.65
820
56.6
1.541
1 1/2
1 5/8
41.275
37.615
0.072
1.83
765
53.7
2.026
2
2 1/8
53.975
49.755
0.083
2.11
665
46.1
3.072
2 1/2
2 5/8
66.675
61.855
0.095
2.41
520
43.2
4.347
3
3 1/8
79.375
73.835
0.109
1.77
605
42.4
5.956
3 1/2
3 5/8
92.075
85.975
0.12
3.05
570
39.8
7.622
4
4 1/8
104.775
97.975
0.134
3.4
555
38.7
9.675
5
5 1/8
130.175
122.055
0.16
4.06
540
37.2
14.373
6
6 1/8
155.575
145.815
0.192
4.88
540
38.1
20.642
8
8 1/8
206.375
192.615
0.271
6.88
580
41.2
38.527
10
10 1/8
257.175
239.995
0.338
8.59
585
41.5
59.939
12
12 1/8
307.975
287.395
0.405
10.29
585
41.5
85.983
 
 

 
 

NOTE

Information and date contained in these charts as taken from ASTM Specifications No. B88. Federal Specification WW-T-799, and various Copper Tube Mill chart standards.

T Based upon 150 F. with an allowable stress of 9000 p.s.l.
* Bursting pressures.ard calculated from the following Formula for thin, hollow, cylinders under tension :

Where

P = 2ts/D

P = Bursting pressure, lb. Per sq. in
T = Wall thickness, inches
D = Outside tube diameter, inches
S = Tensile strenght (36,000 ib, Per sq. in. for haed tube and 30,000 for soft tubes)

* Based upon 150 F, with as allowable stress of 5100 p.s.l.
o Rate internal pressures for copper water tube based on the strength of the tube alone and applicable to systems using suitable mechanical. Joints. (pounds per sq. inch)
 
 
 

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