Where should ASME Connections for pressure relief valves be installed to ensure safety?

Installing ASME Connections for pressure relief valves in direct communication with the vapor space of the tank is essential for ensuring safety. This position allows the pressure relief valve to effectively respond to increases in pressure caused by temperature changes or other factors by venting excess vapor before it can lead to potentially dangerous pressure build-up.

When the connection is in the vapor space, the relief valve ensures that it can function properly at the designed set pressure, thereby providing an immediate response to any overpressure condition. Additionally, this setup helps to prevent liquid from being expelled through the relief valve, which could introduce hazards such as flame extension or reduce the effectiveness of the valve in pressure control.

Choosing other installation points, such as the liquid phase or the bottom of the tank, can impede the valve's operation and may lead to unsafe situations. A remote location is not optimal either, as it may distance the relief system from the pressure source, complicating the timely release of pressure. Overall, positioning the relief valve in direct communication with the vapor space is the most effective approach to maintain safety standards in pressurized systems.