Working Pressures - Chicago Tube & Iron

Recommended Wall Thickness of Tubing
for Various Pressures and Types of Service

Tube OD Inches	Fitting Size	Stainless Steel Tubing for Working Pressures of
Tube OD Inches	Fitting Size	500 psi	1000 psi	1500 psi	2000 psi	2500 psi	3000 psi	4000 psi	5000 psi
“A” Service — Safety Factor: 4
1/8	2	0.032	0.032	0.032	0.032	0.032	0.032	0.032	0.032
3/16	3	0.032	0.032	0.032	0.032	0.032	0.032	0.032	0.032
1/4	4	0.035	0.035	0.035	0.035	0.035	0.035	0.035	0.035
5/16	5	0.035	0.035	0.035	0.035	0.035	0.035	0.035	0.035
3/8	6	0.035	0.035	0.035	0.035	0.035	0.035	0.035	0.049
1/2	8	0.035	0.035	0.035	0.035	0.035	0.035	0.049	0.065
5/8	10	0.049	0.049	0.049	0.049	0.049	0.049	0.065	0.083
3/4	12	0.049	0.049	0.049	0.049	0.049	0.049	0.072	0.095
7/8	14	0.049	0.049	0.049	0.049	0.049	0.065	0.095	—
1	16	0.049	0.049	0.049	0.049	0.065	0.110	0.110	—
1-1/4	20	0.083	0.083	0.083	0.083	0.083	0.120	0.120	—
1-1/2	24	0.094	0.095	0.095	0.095	0.095	0.130	0.130	—
NOTE: Chicago Tube and Iron acts only as a distributor for the product. All information data is recommended by the manufacturer.

Tube OD Inches	Fitting Size	Stainless Steel Tubing for Working Pressures of
Tube OD Inches	Fitting Size	500 psi	1000 psi	1500 psi	2000 psi	2500 psi	3000 psi	4000 psi	5000 psi
“B” Service — Safety Factor: 6
1/8	2	0.032	0.032	0.032	0.032	0.032	0.032	0.032	0.032
3/16	3	0.032	0.032	0.032	0.032	0.032	0.032	0.032	0.032
1/4	4	0.035	0.035	0.035	0.035	0.035	0.035	0.049	0.058
5/16	5	0.035	0.035	0.035	0.035	0.035	0.035	0.049	0.058
3/8	6	0.035	0.035	0.035	0.035	0.035	0.049	0.058	—
1/2	8	0.035	0.035	0.035	0.035	0.049	0.072	0.072	—
5/8	10	0.049	0.049	0.049	0.049	0.065	0.083	—	—
3/4	12	0.049	0.049	0.049	0.049	0.065	0.095	—	—
7/8	14	0.049	0.049	0.065	0.065	0.095	0.095	—	—
1	16	0.049	0.049	0.065	0.065	0.110	0.110	—	—
1-1/4	20	0.083	0.083	0.083	0.083	0.120	—	—	—
1-1/2	24	0.095	0.095	0.095	0.130	0.130	—	—	—
NOTE: Chicago Tube and Iron acts only as a distributor for the product. All information data is recommended by the manufacturer.

Tube OD Inches	Fitting Size	Stainless Steel Tubing for Working Pressures of
Tube OD Inches	Fitting Size	500 psi	1000 psi	1500 psi	2000 psi	2500 psi	3000 psi	4000 psi	5000 psi
“C” Service — Safety Factor: 8
1/8	2	0.032	0.032	0.032	0.032	0.032	0.032	0.032	0.032
3/16	3	0.032	0.032	0.032	0.032	0.032	0.032	0.035	—
1/4	4	0.035	0.035	0.035	0.035	0.035	0.035	0.049	—
5/16	5	0.035	0.035	0.035	0.035	0.035	0.049	0.058	—
3/8	6	0.035	0.035	0.035	0.035	0.049	0.058	—	—
1/2	8	0.035	0.035	0.035	0.049	0.072	0.072	—	—
5/8	10	0.049	0.049	0.049	0.065	0.083	—	—	—
3/4	12	0.049	0.049	0.065	0.095	0.095	—	—	—
7/8	14	0.049	0.049	0.065	0.095	—	—	—	—
1	16	0.049	0.049	0.065	0.110	—	—	—	—
1-1/4	20	0.083	0.083	0.120	0.120	—	—	—	—
1-1/2	24	0.095	0.095	0.130	0.130	—	—	—	—
NOTE: Chicago Tube and Iron acts only as a distributor for the product. All information data is recommended by the manufacturer.