Automatic line leak detectors are not required for which type of piping system?

Automatic line leak detectors are specifically designed to monitor pressurized piping systems for any leaks that could lead to product loss or environmental contamination. In contrast, sloped piping systems are typically designed to promote the drainage of liquid back to a storage tank. Therefore, any potential leaks in sloped piping are less likely to accumulate, making it less critical to have automatic line leak detection in place.

Moreover, the primary focus of leak detection systems is on preventing and identifying leaks in systems that could pose a risk of contamination. Suction piping, for example, is subject to different regulatory requirements and concerns because it operates on a different pressure principle, while secondary containment piping is designed to contain leaks rather than detect them immediately.

Thus, the absence of an automatic line leak detection requirement for sloped piping reflects its lower risk profile and functional design that inherently mitigates the chances of liquid accumulation, making it an effective choice for systems where the drainage is inherent.