HM 26: A guide to liquid metering systems

Overview:

This publication covers the specification, design, installation and operation of metering stations for high accuracy measurement of the bulk flow of liquids in pipelines and process plants. It does not address batch metering systems such as loading racks. The latest edition is an update to incorporate new technologies and the latest standards.

The types of metering system described in this publication are intended primarily for the measurement of petroleum for the purposes of sales, taxation or product allocation in multi-user pipelines; dependent on usage these can generally all be termed custody transfer. In this publication, such systems will be referred to as fiscal metering systems, implying systems with a standard of uncertainty that is the highest that can reasonably be obtained in a practical industrial environment, bearing in mind the balance between cost and uncertainty. It is hoped that this publication will also be of use in the design and specification of metering systems that are not required to meet fiscal standards of uncertainty such as those used for plant operational purposes, equipment performance monitoring, etc.