Operational data end consumers in Belgium

Natural Gas Specifications

The Natural Gas Specifications document, which forms part of the connection agreement, contains an overview of the general specifications that the natural gas supplied must meet. The specifications are identical for all connected companies withdrawing high-calorific gas. The same is true for all companies withdrawing low-calorific gas. Only the minimum and maximum pressures vary between connections: these values are determined on an individual basis in line with the needs of the connected company and the technical and operational options available to Fluxys Belgium.

How is the quantity of gas delivered established?

We use around 80 gas chromatographs spread across our grid to establish the quantity of energy supplied. These chromatographs continuously measure the composition and therefore the precise energy content of the natural gas. The gas chromatographs are located at points where the direction of the natural gas downstream is clearly established. Some natural gas receiving stations at connected companies are also fitted with gas chromatographs.

The data from the gas chromatographs is combined with measurements for, amongst other things, pressure, temperature and volume in the natural gas receiving stations at the connected companies in order to calculate the quantity of energy supplied.

Average composition of natural gas

The Belgian grid is made up of two systems: one for the transmission of low-calorific natural gas and one for the transmission of high-calorific natural gas. The low-calorific gas comes from a single source, the Slochteren field in the Netherlands. The high-calorific gas, however, is often a mix of natural gas from several sources. High-calorific gas is imported from fields in the North Sea (Norway and the United Kingdom), Russia and from various countries that produce liquefied natural gas (LNG). The overviews below list the average composition for natural gas from different sources.