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Title: The revision of ISO 6976 and assessment of the impacts of changes in this standard on the natural gas industry
Author: David Lander Tony Humphreys
Source: 2017 North Sea Flow Measurement Workshop
Year Published: 2017
Abstract: The natural gas industry is large in 2016 worldwide natural gas consumption was some 24 % of total energy consumption and its production amounted to 3542 bcm (BP, 2017). Accurate determination of energy flows of natural gas is therefore very important to all stakeholders in the natural gas industry and ISO 6976 (Natural gas - Calculation of calorific values, density, relative density and Wobbe indices from composition) is an extensively employed standard. It is widely used to determine calorific value of natural gas and hence to compute the amount of energy traded or consumed. It is therefore a reference standard for many natural gas sales contracts and is critical to gas consumer billing in many countries. In addition to calorific value, ISO 6976 is also employed to calculate other important properties of natural gas, such as Wobbe index - a critical property when considering safe operation of natural gas appliances.

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