Selected Nor Tubing O.D Size : 3/8 inch
B.W.G Gauge	Thickness (in)	Internal Area (in2)	Weight per ft Length (lbs)	Internal Dia' (in)	Moment of Interia (in)	Section Modulus (ln)	Radius of Gyration (in)	Liquid Velocity Constant	O.D/I.D	Metal Area (in2)
18	0.049	0.0603	0.171	0.277	0.00068	0.0036	0.1164	94	1.354	0.0502
20	0.035	0.0731	0.127	0.305	0.00055	0.0029	0.1213	114	1.233	0.0374
22	0.028	0.0799	0.104	0.319	0.00046	0.0025	0.1227	125	1.176	0.0305
24	0.022	0.0860	0.083	0.331	0.00038	0.0020	0.1248	134	1.133	0.0244
** Liquid Velocity = Mass flow (lbs/hr) / (C * Sp.gr), ft/sec (Sp.gr of Water @60�� = 1.0)
** Characteristics of tubing base on low carbon steel