Before starting a tightness test, which safety step is essential?

Before starting a tightness test, which safety step is essential?

• A. Increase test pressure to twice normal operating pressure
• B. Ensure ignition sources are eliminated, the area is ventilated, and the tank is isolated from product lines per protocol
• C. Paint over all labels to protect them
• D. Disable ventilation system

Answer: (B)

Before starting a tightness test, the essential step is to ensure the area is free of ignition sources, the space is ventilated, and the tank is isolated from product lines according to protocol. This combination reduces the risk of fire or explosion if a leak occurs during testing: removing ignition sources prevents sparks or flames from igniting any released gas, adequate ventilation prevents vapor buildup, and isolating the tank stops test gas or leaked contents from entering product lines or other equipment. The other options heighten danger or are ineffective: cranking up test pressure doubles the risk of rupture, painting over labels doesn’t improve safety, and disabling ventilation allows vapors to accumulate and increases explosion risk.

Before starting a tightness test, the essential step is to ensure the area is free of ignition sources, the space is ventilated, and the tank is isolated from product lines according to protocol. This combination reduces the risk of fire or explosion if a leak occurs during testing: removing ignition sources prevents sparks or flames from igniting any released gas, adequate ventilation prevents vapor buildup, and isolating the tank stops test gas or leaked contents from entering product lines or other equipment. The other options heighten danger or are ineffective: cranking up test pressure doubles the risk of rupture, painting over labels doesn’t improve safety, and disabling ventilation allows vapors to accumulate and increases explosion risk.