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

Reference:

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