Suggested Allowable Working Pressure Tables (psig)

Stainless Steel
Tube Size O.D.	Tube Wall Thickness (inches)
	.028	.035	.049	.065	.083	.095	.109	.120
1/8"	8500	10900
3/16"	5500	7000	10250
1/4"	4000	5100	7500	10200
5/16"		4050	5900	8050
3/8"		3300	4800	6550
1/2"		2500	3500	4700	6250
5/8"			2900	4000	5200	6050
3/4"			2400	3300	4250	4950	5800
7/8"			2050	2800	3600	4200	4850
1"				2400	3150	3650	4200	4700

75,000 PSI Tensile

Note: For welded and drawn tubing, a derating factor must be utilized. For double welded tube, multiply the above pressure rating by .85; and for single welded tube by .80 (ANSI B 31, Table A-1B).

Carbon Steel
Tube Size O.D.	Tube Wall Thickness (inches)
	.028	.035	.049	.065	.083	.095	.109	.120
1/8"	8100	10200
3/16"	5150	6650	9700
1/4"	3750	4850	7100	10000
5/16"		3750	5500	7600
3/8"		3100	4500	6200
1/2"		2300	3250	4500	5950
5/8"			2600	3500	4600	5350
3/4"			2150	2900	3750	4350	5100
7/8"			1800	2450	3200	3700	4300
1"				2100	2750	3200	3700	4100

47,000 PSI Tensile

Copper
Tube Size O.D.	Tube Wall Thickness (inches)
	.028	.035	.049	.065	.083	.095	.109	.120
1/8"	2750	3700
3/16"	1700	2300	3500
1/4"	1300	1650	2550	3550
5/16"		1300	1950	2750
3/8"		1050	1600	2250
1/2"		800	1150	1600	2100
5/8"			900	1250	1650	1950
3/4"			750	1000	1350	1550	1850
7/8"			600	850	1100	1300	1550
1"			550	750	950	1150	1350	1500

30,000 PSI Tensile

Values in reverse text are not recommended for Gas Service