What does Sediment and Water (SW) refer to in petroleum liquids?

Sediment and Water (SW) refers to the solid materials and water that are present in petroleum liquids but are not part of the hydrocarbon composition. This terminology is crucial in the petroleum industry, particularly in the context of crude oil and refined products, as it impacts the quality and value of the oil.

SW can include a variety of substances, such as dirt, rust, and water that accumulates during drilling, transportation, or storage processes. The presence of sediment and water can affect the processing of petroleum, leading to challenges such as increased production costs, corrosion, and potential environmental concerns if not managed properly.

On the other hand, hydrocarbons in liquid form, the oily fluids remaining in storage tanks after discharge, and compressed gases do not capture the definition of sediment and water. The correct understanding of SW is essential for tankermen, as they must ensure that the materials being handled meet the required specifications and quality standards, and to make appropriate decisions related to blending, separation, and overall operations.