What is the required direction for pressure relief devices to discharge?

Pressure relief devices are critical safety components designed to prevent the build-up of excessive pressure within containers or systems holding non-flammable compressed gases. The required direction for these devices to discharge is upward and unobstructed.

When pressure relief devices discharge upward, it allows the released gas to rise and disperse quickly into the atmosphere, minimizing the risk of accumulation in confined spaces, which could create potential hazards. An unobstructed discharge path is essential to ensure that the gas can escape freely, helping to maintain safety and prevent dangerous situations, such as explosions or the creation of flammable environments.

Choosing an upward direction ensures that any released gas does not interfere with other equipment or personnel and promotes effective ventilation of the area, thereby enhancing safety measures. This is why the correct answer emphasizes both the upward direction and the need for an unobstructed pathway for the relief of pressure.