What pressure does a rupture disc burst on an oxygen cylinder?

What pressure does a rupture disc burst on an oxygen cylinder?

• A. 3200 psi (100 psi below its tested pressure)
• B. 3200 psi (100 psi above its tested pressure)
• C. 3000 psi
• D. 3500 psi

Answer: (A)

Rupture discs are safety devices that vent gas when pressure climbs enough to risk the cylinder, preventing a catastrophic failure. They’re set so they will give way just before the cylinder reaches its certified test limit, providing a predictable relief path in an overpressure event. On an oxygen cylinder, that means the disc is calibrated to burst at about 3200 psi, roughly 100 psi below the tested pressure. This small margin ensures relief occurs before the full test pressure is reached, protecting the cylinder from over-pressurization while avoiding premature venting during normal operation.

Rupture discs are safety devices that vent gas when pressure climbs enough to risk the cylinder, preventing a catastrophic failure. They’re set so they will give way just before the cylinder reaches its certified test limit, providing a predictable relief path in an overpressure event. On an oxygen cylinder, that means the disc is calibrated to burst at about 3200 psi, roughly 100 psi below the tested pressure. This small margin ensures relief occurs before the full test pressure is reached, protecting the cylinder from over-pressurization while avoiding premature venting during normal operation.