How much pressure does a G cylinder hold when full?

A G cylinder, commonly used for storing medical gases such as oxygen, typically holds a significant amount of pressure when full. The correct pressure for a fully charged G cylinder is approximately 2200 psi. This high pressure is necessary to store gaseous oxygen and other medical gases in a compact form, allowing for efficient transport and use in medical settings.

In the context of the options provided, the pressures listed in choices A, B, and C are inaccurately low for a full G cylinder, as they do not reflect the standard storage pressures associated with compressed medical gases. Therefore, the correct answer, which reflects the proper pressure for a filled G cylinder, is 2200 psi. Understanding this pressure is critical not only for safety but also for ensuring that medical staff can appropriately gauge the amount of gas available for patients.