What is the primary consequence of operating above a liquid's flashpoint?

Operating above a liquid's flashpoint significantly increases fire risk because the flashpoint is the lowest temperature at which a liquid can form an ignitable mixture with air. Once the temperature exceeds this threshold, the vapor produced by the liquid can ignite in the presence of an ignition source. This creates a hazardous situation where fires can start more easily, making it critical for operations involving flammable materials to maintain temperatures below the flashpoint.

While it is true that reduced efficiency, lower production rates, and increased material costs might occur due to safety measures or precautions taken when working with flammable substances, these factors are secondary to the immediate and pressing issue of fire risk associated with exceeding the flashpoint. Hence, the primary concern in such scenarios is the increased likelihood of fire, which necessitates stringent safety protocols and practices to mitigate hazards.