What is the maximum amount of NH3 allowed to be stored in a mechanical room, excluding the liquid charge?

The maximum amount of ammonia (NH3) allowed to be stored in a mechanical room, excluding the liquid charge, is set at 330 pounds. This limit is established based on safety regulations to minimize the risks associated with ammonia storage, such as exposure to toxic vapors and potential environmental hazards in case of a leak or spill.

Regulatory guidelines often categorize substances like ammonia based on their potential dangers, and the 330-pound threshold reflects a balance between practicality for operations and maintaining a safe environment within mechanical rooms. Exceeding this limit could require additional safety measures or approvals, such as specialized ventilation systems, secondary containment, or the involvement of emergency response protocols.

Understanding these safety measures is crucial for compliant operations in facilities that handle ammonia and similar hazardous materials. This knowledge helps ensure that suitable precautions are taken to protect workers and the public from potential risks associated with ammonia storage.