The discharge pipe of a high pressure safety valve should be configured in what manner?

The discharge pipe of a high pressure safety valve should be configured as short and straight as possible to ensure efficient drainage of the flow and to minimize pressure drop. A straight and short configuration allows the discharge to exit the system quickly, reducing the chance of back pressure that could impair the valve's function. This is critical because safety valves are designed to open in an overpressure situation, and any interruptions or restrictions in the discharge path can result in the valve not functioning correctly when needed.

A long and winding discharge pipe could introduce unnecessary resistance to the flow, impeding the immediate release of pressure. Similarly, incorporating multiple bends would complicate the flow path and could also create additional pressure drops or points where turbulence might develop. While a downward sloping configuration might seem beneficial by helping gravity assist in drainage, the primary focus should be on minimizing length and bends to ensure the highest efficiency in discharging the overpressure.

Therefore, the correct approach is to keep the discharge piping as short and direct as possible, ensuring that the safety valve operates effectively under its designed pressure-releasing conditions.