What is the minimum height for a vent pipe above ground when inerting or purging?

The minimum height for a vent pipe above ground when inerting or purging is specified to be 12 feet. This requirement is in place to ensure safety and prevent any potential ignition of flammable vapors that may escape from the tank. By having the vent pipe elevated to this height, it helps to disperse any gases into the atmosphere away from potential ignition sources, thus minimizing risk and enhancing safety for both workers and surrounding environments.

The specific height of 12 feet is derived from safety regulations and best practices that recognize the behavior of vapor dispersion. Being at this height allows for adequate ventilation and reduces the likelihood of flammable vapor accumulation at ground level where it could pose a hazard. Following these guidelines is crucial for compliance with regulations and for maintaining safe operations in facilities that involve combustible materials.