What should be done before disconnecting a pressurized line?

• A. Wait for natural pressure release
• B. Depressurize the system safely
• C. Apply heat to loosen fittings
• D. Check for leaks

Answer: (B)

Before disconnecting a pressurized line, it is essential to depressurize the system safely to prevent any hazardous conditions that could arise from sudden release of pressure. Depressurizing the system minimizes the risk of injury from high-pressure fluid escaping, which can lead to dangerous situations such as bursts, splashes, or uncontrolled fluid release. This process involves carefully following established procedures to ensure that any remaining pressure is safely and methodically released, allowing for a secure and controlled disconnection of the line.

While waiting for natural pressure release may seem like a passive solution, it may not ensure complete depressurization or control over the process. Applying heat to fittings is not a recommended practice for disconnecting pressurized lines, as it may compromise the integrity of the materials or create additional hazards. Checking for leaks is a good safety practice but should not replace the critical step of safely relieving system pressure before any disconnection occurs. Thus, safely depressurizing the system is the paramount step to ensure safety and integrity in handling pressurized lines.