Density, API Gravity and Relative Density

How density measurements relate to API gravity and petroleum product characterization.

Purpose

This article provides a concise technical reference for laboratory and refinery professionals. Always follow the current applicable standard, laboratory SOP and safety requirements.

Key points

• Verify sample identity and condition.
• Use calibrated equipment and controlled test conditions.
• Record observations, units and deviations clearly.
• Report results according to the applicable method.