UOP 422-66 covers particle size distribution by micromesh sieves, giving laboratories a practical way to evaluate how a sample is divided across size ranges. For buyers reviewing UOP 422-66, the method is relevant when particle sizing affects product handling, quality comparison, or technical specification checks in petroleum and chemical work. It supports consistent sample evaluation by helping analysts and technical teams compare materials on a repeatable basis. As a UOP Test Method, it is suited to organizations that need a clear laboratory approach for particle size characterization.

Purpose of UOP 422-66

The purpose of UOP 422-66 is to provide a standardized method for determining particle size distribution using micromesh sieves. In practical laboratory terms, this type of method helps define how a material is spread across different sieve openings, which can be important for characterizing process materials, intermediates, or finished products. It is a measurement-focused UOP method that supports analytical consistency and makes particle size results easier to compare across routine testing, product review, and technical documentation.

Laboratory use of UOP 422-66

UOP 422-66 may be used in laboratory environments where particle size evaluation is part of routine quality control or method selection. Refinery QA/QC teams, laboratory analysts, analytical chemists, and technical reviewers may rely on this type of standard when comparing material lots or reviewing sample behavior. It is especially relevant where controlled sizing information helps support product classification, process monitoring, or laboratory reporting. The method fits well into technical workflows that require a recognized sieve-based approach to particle distribution analysis.

Practical importance of UOP 422-66

In day-to-day professional use, UOP 422-66 matters because particle size distribution can influence how a material is handled, compared, and documented. A clear sieve-based method helps reduce ambiguity in testing results and supports more reliable internal review across laboratory and quality functions. For organizations working with petroleum or chemical samples, it can improve consistency in sample evaluation and strengthen the technical basis for decisions about acceptance, comparison, or process follow-up. UOP 422-66 is therefore useful where repeatable laboratory data is needed.

• Particle size distribution by micromesh sieves
• Laboratory sample characterization
• Refinery QA/QC support
• Material comparison and review
• Repeatable sieve-based analysis
• Technical documentation reference