Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 1: General principles and requirements (ISO 5167-1:2022)

This document specifies the general principles and requirements for the use of differential pressure flowmeters installed in circular cross-section pipelines that are completely filled with fluid. It covers the fundamental theoretical basis necessary for accurate flow measurement applications across various industrial sectors. The content outlines the conditions under which these devices can be reliably employed, ensuring consistency in measurement methodology. Detailed provisions address the geometric constraints and operational parameters essential for maintaining measurement integrity. The text serves as a foundational reference for implementing flow measurement systems utilizing pressure differential techniques. It provides the essential framework for understanding how such instruments function within fully developed flow regimes. By establishing clear guidelines for installation and operation, this standard facilitates uniformity in fluid dynamics assessments. The scope encompasses the basic definitions, nomenclature, and general performance criteria applicable to the described measurement devices. It aims to support technical professionals in applying these methods effectively without introducing ambiguity into their measurement processes. The document acts as a comprehensive guide for establishing reliable flow measurement practices in compliant environments.