What must the design of a tank containing flammable liquids under API 650 account for?

• A. Pressure fluctuations
• B. Environmental impact assessments
• C. Fire safety and vapor emissions
• D. Tank relocation requirements

Answer: (C)

The design of a tank containing flammable liquids, according to API 650, must prioritize fire safety and vapor emissions due to the inherent risks associated with storing such substances. This involves considerations for preventing ignition sources, implementing proper ventilation systems, and minimizing the release of vapors that could lead to flammable concentrations in the air.

Effective design strategies include the installation of safety features such as flame arresters, proper sealing of fittings, and the installation of systems that manage vapor recovery. By addressing these factors, the tank design not only ensures compliance with safety regulations but also protects the surrounding environment and communities from potential hazards.

Choosing to focus on fire safety and vapor emissions in the design process is crucial for mitigating fire risks and enhancing operational safety of tanks utilized for the storage of flammable liquids. Other considerations like pressure fluctuations, while important in certain contexts, do not encompass the primary safety concerns linked to flammable materials. Environmental impact assessments and tank relocation requirements are also significant but do not directly address the immediate safety concerns regarding fire and vapor management within the tank itself.