National Physical Laboratory

Metrology for LNG (liquefied natural gas)


Metrology for LNG

Liquefied Natural Gas (LNG) is being imported into Europe in increasing quantities. Its use in power plants, industry and homes offers a strategic and often more economical alternative fuel to pipeline natural gas.

The EMRP (European Metrology Research Programme) 'Metrology for LNG II' project aims to develop a metrological framework for LNG to contribute to a reduction of the measurement uncertainty of LNG custody transfer by a factor of two (from 1 % to 0.5 % relative), thus enabling the development of LNG as a clean transport fuel.

Project overview

A short summary of the project is available on the EMRP website

The project runs from June 2014 to May 2017 and comprises six workpackages:

  WP1:  Mass and volume flow measurements Led by FORCE Technology, Denmark
  WP2:  LNG composition measurements Led by NPL, UK
  WP3:  Methane number standardised method Led by VSL, The Netherlands
  WP4:  Density, enthalpy and calorific value Led by PTB, Germany
  WP5:  Creating impact Led by JV, Norway
  WP6:  Management and coordination Led by VSL, The Netherlands

NPL's activities

NPL's main roles in the project are:

  • To develop a novel LNG liquefier / measurement cell system
  • To use the liquefier / measurement cell to validate Raman spectroscopy measurements of LNG composition
  • To develop and validate a new algorithm for determining methane number from LNG composition

Project website

A project website is currently under development. The website for the predecessor, EMRP Metrology for LNG  project, is still available online.

Traceable standards

NPL supplies traceable, high-accuracy Primary Reference Gas Mixtures of natural gas and liquid hydrocarbons

Contact us

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Customer enquiry tel: +44 20 8943 8715

Last Updated: 23 Dec 2014
Created: 23 Dec 2014


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