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Working Pressures Copper Tubing

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Allowable Working Pressures for Copper Tubing for copper tubing type ACR used in refrigerant piping systems.

Pipe size,
in
Wall
thickness,
in
Rated internal working pressure,
psig
100°F
(38°C)
200° F
(93°C)
300°F
(149°C)
400° F
(204°C)
Annealed
Drawn
Annealed
Drawn
Annealed
Drawn
Annealed
or
Drawn
1/8
0.030
3130
-
3090
-
2620
-
1310
3/16
0.030
1990
-
1950
-
1650
-
820
1/4
0.030
1450
-
1420
-
1200
-
600
15/16
0.032
1230
-
1200
-
1020
-
510
3/8
0.030
900
1350
880
1300
740
1180
370
3/8
0.032
1010
-
990
-
840
-
420
1/ 2
0.032
740
-
730
-
610
-
300
1/2
0.035
800
1200
780
1150
660
1060
330
5/8
0.035
640
-
630
-
530
-
260
5/8
0.040
740
1110
720
1060
610
980
300
3/4
0.042
650
980
630
930
530
850
260
7/8
0.045
590
890
570
840
480
770
240
1 - 1/ 8
0.050
510
770
490
720
420
670
210
1 - 3/ 8
0.030
460
690
440
650
370
590
180
1 - 5/ 8
0.030
430
650
410
600
350
560
170
2 - 1/ 8
0.030
370
560
360
530
300
480
150
2 - 5/ 8
0.030
350
530
340
500
280
450
140
3 - 1/ 8
0.030
330
500
320
470
270
430
130
3 - 5/ 8
0.030
320
480
300
440
260
420
130
4 - 1/ 8
0.030
300
450
290
430
240
380
120

Related:

Reference:

  • Reproduced from M. L. Nayyar, Piping Handbook, 7th ed., New York, McGraw-Hill, 2000.