CFD Advantage tube fitting is designed for a wide range of leak-free application including gas leak proof and vacuum tight service. Gases (helium, hydrogen, nitrogen, air, etc.) can escape even the most minute leak-path due to their very small molecules. Tube therefore must be handled cleanly and correctly as to not have scratches, draw mark, nicks, flat spots, dirt, and dust. 

DO NOT use thin wall tubing for gas applications. Heavier wall tubing resists the ferrule action whereas thin wall tubing may collapse with little resistance to ferrule action.

For Gas service, use the tubing wall listed on un-shadowed section in table.

Vacuum Application, CFD Advantage tube fittings have been proved to be excellent vacuum tight seal in many applications including analytical industry.

Cryogenic Application, CFD Advantage Fittings in SS316 Stainless Steel provide highly reliable performance on cryogenic application. Cryogenic temperature is considered to be temperatures below -100°F (-73°C).

High Pressure Application, Pressure 500 psig (34.5 bar) or higher is considered generally high pressure. In the high pressure system scratches, draw mark, nicks, flat spots, and dirt on tubing may cause leakage.

Tubing allowable working pressure is calculated at -20 to 100°F (-28 to 37°C) using allowable stress value of 20,000 psi according to ASME B31.3 Process Piping Code. Pressure calculations are based on maximum O.D. and minimum wall thickness and no allowance is made for corrosion and erosion. i.e., ASTM A269 1/2 in. OD x 0.035 in.WT: OD tolerance 0.005 in., WT tolerance 15%. Calculations are based on 0.505 in.OD x 0.0298 in. WT. Safety Factor is 3.75 to 1, considering ultimate tensile strength of 75,000 psi. To determine working pressure of ASME B31.1 Power Piping Code, multiply the ASME 31.3 rating by 0.94.