What is the hydrostatic test pressure relative to normal pressure for a 4B195 cylinder?

What is the hydrostatic test pressure relative to normal pressure for a 4B195 cylinder?

• A. Twice the normal pressure
• B. Three times the normal pressure
• C. The same as the normal pressure
• D. Four times the normal pressure

Answer: (B)

Hydrostatic testing checks the cylinder’s ability to withstand internal pressure by pushing it well beyond normal operating conditions. For the 4B195 cylinder, the standard test uses a pressure three times the normal service pressure. This larger margin helps reveal hidden flaws or weaknesses that could fail under stress, ensuring the cylinder remains safe between inspections. So, if the cylinder’s normal operating pressure is 195 psi, the hydrostatic test pressure would be 585 psi.

Hydrostatic testing checks the cylinder’s ability to withstand internal pressure by pushing it well beyond normal operating conditions. For the 4B195 cylinder, the standard test uses a pressure three times the normal service pressure. This larger margin helps reveal hidden flaws or weaknesses that could fail under stress, ensuring the cylinder remains safe between inspections. So, if the cylinder’s normal operating pressure is 195 psi, the hydrostatic test pressure would be 585 psi.