UOP 766-91 is a UOP Test Method for Piece Density by Mercury Displacement, providing a standardized way to evaluate the density of a piece-shaped specimen through laboratory displacement measurement. For buyers reviewing analytical methods, it helps define a consistent approach for materials where piece density is a relevant physical property, supporting comparison, specification review, and routine documentation. UOP 766-91 is a practical reference for laboratories that need a recognized method for technical evaluation and quality control, especially when precise and repeatable density data are important to product assessment.

What is UOP 766-91?

This method focuses on measuring piece density by mercury displacement, which places it in the category of a laboratory measurement method rather than a broad process specification. In practice, it is used to determine the density of a discrete piece or sample form under controlled analytical conditions. That makes UOP 766-91 relevant when a team needs a standardized, defensible result for material characterization, comparison between samples, or internal quality documentation. Its value lies in providing a clear method framework for a specific physical property.

Where is UOP 766-91 used?

UOP 766-91 is typically used in laboratory and technical environments where piece density data support material review, quality checks, or product comparison. It may be relevant to refinery and petrochemical laboratories, analytical chemists, and QA/QC personnel working with samples that require standardized physical property testing. Technical reviewers and process engineers may also reference it when consistent density information is needed for documentation or acceptance decisions. For organizations handling petroleum-related or chemical materials, the method helps align lab practice with a recognized UOP standard.

Why is UOP 766-91 important?

UOP 766-91 matters because density is often a useful indicator in product evaluation, sample classification, and laboratory reporting. A standard method helps reduce ambiguity when different teams need to compare results or verify a material against internal expectations. For day-to-day operations, that can support better QA/QC decisions, clearer documentation, and more consistent communication between the lab and technical staff. UOP 766-91 is especially useful when a buyer wants a formal method reference for dependable physical property measurement.

• Piece density measurement by mercury displacement
• Laboratory-focused UOP test method
• Supports sample comparison and quality review
• Useful for refinery and petrochemical lab workflows
• Relevant to analysts, QA/QC teams, and technical reviewers