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Medical Gases - Piping Dimensions

Dimensions of Copper Tubes for Medical Gases

Nominal Size	Outside Diameter (in)	Inside Diameter (in)	Wall Thickness (in)	Internal Volume of Tube (cu.ft per ft)
1/4	0.375	0.305	0.035	0.00051
3/8	0.500	0.402	0.049	0.00088
1/2	0.625	0.527	0.049	0.00151
5/8	0.750	0.652	0.049	0.00232
3/4	0.875	0.745	0.065	0.00303
1	1.125	0.995	0.065	0.00540
1 1/4	1.375	1.245	0.065	0.00845
1 1/2	1.625	1.481	0.072	0.0120
2	2.125	1.959	0.083	0.0209
2 1/2	2.625	2.435	0.095	0.0323
3	3.125	2.907	0.109	0.0461
4	4.125	3.857	0.134	0.0811

Nominal Size	Outside Diameter (in)	Inside Diameter (in)	Wall Thickness (in)	Internal Volume of Tube (cu.ft per ft)
1/4	0.375	0.315	0.030	0.00054
3/8	0.500	0.430	0.035	0.00101
1/2	0.625	0.545	0.040	0.00162
5/8	0.750	0.666	0.042	0.00242
3/4	0.875	0.785	0.045	0.00336
1	1.125	1.025	0.050	0.00573
1 1/4	1.375	1.265	0.055	0.00873
1 1/2	1.625	1.505	0.060	0.0124
2	2.125	1.985	0.070	0.0215
2 1/2	2.625	2.465	0.080	0.0331
3	3.125	2.945	0.090	0.0473
4	4.125	3.905	0.110	0.0832