A standard oxygen cylinder that contains 244 cf at 2200 psi and 700 (6.5 m3 at 15200 kPa at 200C) will contain 122 cf (3.25 m3) when the pressure has dropped to 1100 psi at 700F (7600 kPa at 200C). In the dissolved acetylene cylinder, the relationship between pressure and remaining acetylene content is less precise.
