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Dimensions and Physical Characteristics of Copper Tube : TYPE M

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
8.245
0.025
0.640
840
57.2
0.16
3/8
1/2
12.700
11.42
0.025
0.640
840
57.2
0.217
1/2
5/8
15.875
14.455
0.028
0.710
760
51.5
0.302
5/8
3/4
19.050
17.53
0.03
0.760
690
45.5
0.39
3/4
7/8
22.225
20.605
0.032
0.810
610
39.6
0.487
1
1 1/8
28.575
26.795
0.035
0.890
515
34.4
0.692
1 1/4
1 3/8
34.925
32.785
0.042
1.070
515
35.0
1.017
1 1/2
1 5/8
41.275
38.795
0.049
1.240
510
35.1
1.393
2
2 1/8
53.975
51.035
0.053
1.470
450
30.7
2.167
2 1/2
2 5/8
66.675
63.375
0.065
1.650
410
28.4
3.012
3
3 1/8
79.375
75.715
0.072
1.830
385
26.8
3.983
3 1/2
3 5/8
92.075
87.855
0.083
2.110
385
26.7
5.328
4
4 1/8
104.775
99.955
0.095
2.410
550
26.6
6.925
5
5 1/8
130.175
124.635
0.109
2.770
355
25.1
9.906
6
6 1/8
155.575
149.375
0.122
3.100
335
23.3
13.268
8
8 1/8
206.375
197.735
0.17
4.320
350
24.8
24.502
 
 

 
 

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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