What are typical cylinder pressures for oxygen and acetylene?
(top) The typical acetylene cylinder is filled to a pressure of 250 psig at 70 degrees Fahrenheit. Typical oxygen cylinder pressure is 2217 psig at 70 degrees Fahrenheit. However, cylinder pressure will vary with the temperature. As the temperature goes down the pressure inside the cylinder will go down. A cylinder left outside in winter will show a lower pressure than a cylinder that is brought inside and allowed to warm up. Similarly, a cylinder outside in the sun in the summer will register a higher pressure. In both cases the amount of gas contained in the cylinder has not changed, it is only the pressure that has.
