Nozzle flow meters are commonly used to measure the flow rate of natural gas in pipelines and other gas fluids. This manual outlines the installation process for
nozzle flow meters that are installed in between flanges on a natural gas pipeline or other applications as agreed in the supply documents. Flow nozzles are also used in various industries, particularly for steam flow in the power sector. Due to their long documented history, flow nozzle designs and installation requirements are known and recognized by national and international standards organizations such as ISO 5167 part 3.