This book gives the background to differential-pressure flow measurement and goes through the requirements explaining the reason for them. For those who want to use an orifice plate or a Venturi tube the standard ISO 5167 and its associated Technical Reports give the instructions required. However, they rarely tell the users why they should follow certain instructions. This book helps users of the ISO standards for orifice plates and Venturi tubes to understand the reasons why the standards are as they are, to apply them effectively, and to understand the consequences of deviations from the standards.

Autorentext

Dr Reader-Harris is Principal Consultant in flow measurement at NEL. He provides technical leadership to projects, carries out consultancy work particularly in the area of differential pressure meters, and undertakes work in support of Standards.

Inhalt

Introduction.- Orifice Design.- Venturi Design.- General Design.- Orifice Discharge Coefficient.- Orifice Expansibility Factor.- Venturi tube discharge coefficient in high-pressure gas.- Installation effects.- Nozzles.- Orifice plates with drain holes.- Wet gas.- Standards.