Leak testing a low pressure refrigeration system with nitrogen in excess of 10 psig could cause which component to fail?

Leak testing a low pressure refrigeration system with nitrogen in excess of 10 psig could cause which component to fail?

• A. Condenser tubes
• B. Purge unit shells
• C. Evaporator tubes
• D. Rupture disc

Answer: (D)

When leak testing a low pressure refrigeration system, the use of nitrogen is common to pressurize the system. However, if the pressure exceeds 10 psig, it can pose a risk to certain components designed to handle lower pressures. In this case, the rupture disc is specifically engineered as a safety device that protects the system from overpressure situations. Its primary function is to open and relieve pressure if it exceeds a pre-set limit, thereby preventing potential catastrophic failure of surrounding equipment. When nitrogen pressure exceeds 10 psig during testing, it could activate the rupture disc, leading to its failure and the potential for loss of the testing medium, which could compromise the effectiveness of the test and pose safety hazards. The other components listed, while they may be affected by high pressures, are not specifically designed with overpressure safety features like a rupture disc is. Thus, they are less likely to fail under these testing conditions compared to a rupture disc.

When leak testing a low pressure refrigeration system, the use of nitrogen is common to pressurize the system. However, if the pressure exceeds 10 psig, it can pose a risk to certain components designed to handle lower pressures.

In this case, the rupture disc is specifically engineered as a safety device that protects the system from overpressure situations. Its primary function is to open and relieve pressure if it exceeds a pre-set limit, thereby preventing potential catastrophic failure of surrounding equipment. When nitrogen pressure exceeds 10 psig during testing, it could activate the rupture disc, leading to its failure and the potential for loss of the testing medium, which could compromise the effectiveness of the test and pose safety hazards.

The other components listed, while they may be affected by high pressures, are not specifically designed with overpressure safety features like a rupture disc is. Thus, they are less likely to fail under these testing conditions compared to a rupture disc.