When adding additional pressure relief valves, what should they be set at?

When adding additional pressure relief valves, the appropriate setting is critical for ensuring the safety and functionality of the system. The option that specifies the range between 6 psi and a maximum of 60 psi is correct because it provides flexibility in pressure regulation, tailored to the specific operational needs of the system. This range ensures that the relief valves can effectively manage overpressure situations without being overly restrictive, thereby maintaining safe operating conditions.

Setting relief valves too close to the maximum allowable working pressure (MAWP) could lead to safety risks if system conditions fluctuate unpredictably. In contrast, using a fixed pressure setting, such as 50 psi, doesn't account for varying operational scenarios or the specific characteristics of the system, which may require more nuanced pressure settings based on the actual application needs. Setting relief valves equal to the first valve may also lead to inadequate pressure management if the first valve is misconfigured or if operating conditions change. Thus, the defined range allows for a balance between safety and operational efficiency.