🔍 Key Concepts

• Meaning of pour point vs flash point for heavy fuel oil • Why fuel in tanks "on suction" (or soon to be) needs different treatment than idle storage tanks • Relationship between temperature, pumpability/viscosity, and safety when heating heavy fuel oil

💭 Think About

• Which property (pour point or flash point) is directly related to whether the fuel will flow easily to the suction and through the pumps? • What happens if you keep heavy fuel oil below its pour point when you actually need to transfer or burn it within 24 hours? • Is it efficient or necessary to heat all storage tanks the same way for the entire voyage, even those not needed soon?

✅ Before You Answer

• Identify which temperature reference is used in industry to ensure pumpability of heavy fuel oil (pour point vs flash point). • Check which tanks must be ready for immediate use (currently on suction or within 24 hours) versus long‑term storage tanks. • Confirm whether recommended practice is to maintain temperature above or below the pour point to keep heavy fuel oil flowing.