IGEM/GM/5 Edition 3 - Electronic gas volume conversion systems

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This standard covers electronic gas volume conversion systems. However, many principles may equally be applied to flow computers and the procedures for flow computers are included where appropriate. It is not intended to be used in conjunction with high accuracy meter installations where, for example flow computers are configured to receive live data of the gas composition. 

It covers the installation, commissioning, validation, monitoring and maintenance of systems that convert gas volume readings to base conditions by taking into consideration temperature, pressure, and if appropriate the compressibility of the gas. In general they are not used at an Operating Pressure exceeding 7 bar. The systems covered within may be designed for installation in either indoor or outdoor environments. Suitably designed systems may be installed in hazardous areas. 

Specifically, it contains details of:

  • Legal considerations such as Gas Safety (Installation and Use) Regulations and the Health and Safety at Work etc. Act
  • Pre-installation tests
  • Design and installation, including positioning and connecting of the components, along with security of the conversion systems
  • Commissioning and system performance checks
  • Validation of a system
  • Monitoring, inspection and maintenance of systems
  • Records and reporting.

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