What are the requirements for performing leak checks using fuel gas?

Performing leak checks using fuel gas is critical for ensuring the safety and integrity of LP gas systems. The requirement that these checks necessitate prior pressure testing in accordance with specific standards is essential for a few reasons.

Firstly, prior pressure testing establishes a baseline for the system's integrity. This involves testing the system under pressure to identify any leaks before the leak check is conducted. By ensuring that the system is pressurized according to the standards, technicians can verify the system's ability to hold pressure and identify weak points or potential leak sources more effectively.

Additionally, specific standards often dictate the procedures to follow during both pressure testing and leak checking, helping to maintain consistency and safety in the operation. This regulatory compliance is important not only for workers' safety but also for the safety of occupants in residential or commercial buildings that utilize LP gas.

The other choices present situations that would not align with best practices for gas safety. Performing leak checks at any time without prior pressure testing could lead to overlooking significant issues that pose safety risks. Similarly, stating that leak tests are not allowed in newly installed systems or that they can only be done in residential settings does not reflect the comprehensive nature of leak testing, which can apply across various scenarios.

Thus, the requirement for prior pressure testing