Gas system
Elering provides the natural gas transmission service, which is the transport of gas in the transmission system from the Estonian border to the connection points of clients.
Elering acquired control of the natural gas transmission system in January 2015. Until the end of the same year, the natural gas transmission system operated under the name Elering Gaas AS. Since the beginning of 2016, Elering has consolidated its electricity and gas transmission systems into one company and continues to operate as a combined system operator.
Monthly summaries for the gas system
Every month, Elering publishes a gas system summary on its website, which highlights the most important indicators in the gas system for the previous month.
Calculation of transmission capacity
Technical transmission capacity means the maximum firm capacity that the transmission system operator can offer to network users, taking into account the integrity of the transmission system and the efficient operation of the system. Technical transmission capacity is calculated and offered to network users at all relevant entry-exit points of the Estonian natural gas transmission system.
To calculate the technical transmission capacity, the entire transmission system and its related parameters must be taken into account. Since the transmission system is a large and complex system of pipelines affected by many variables, the gas calculation software SIMONE is used to calculate the technical capacity. SIMONE allows creating a model describing the transmission system and performing static and dynamic gas network simulations.
The transmission system model created in SIMONE describes the transmission system and its operating dynamics as accurately as possible. When creating a system model and performing simulations in SIMONE, several system components and parameters are taken into account:
- Pipe length
- Pipe diameter
- Pipe roughness
- Valve stations
- Adjustment stations
- Gas compressor stations
- Gas metering stations (GMS)
- Gas distribution stations (GDS)
- Limiting parameters of the transmission system (e.g. maximum operating pressure of pipes; minimum GDS pressure; maximum permissible gas velocity)
In addition to the transmission system, the calculation of the technical transmission capacity takes into account gas consumption, different gas supply scenarios, planned investments and all known maintenance work in the transmission system at the time of the calculations.
Maintenance work
Gas transmission system operators (TSOs) of the Baltic-Finnish region - AB Amber Grid, Conexus Baltic Grid AS, Elering AS, and Gasgrid Finland Oy - together with LNG terminal operators AB KN Energies and Floating LNG Terminal Finland Oy (LTOs), have prepared the Consolidated Maintenance Works Plan for the Baltic-Finnish region.
This plan covers the period from January to December 2027 and includes planned maintenance works for gas transmission systems, LNG terminals, and Inčukalns Underground Gas Storage, as well as outlines the capacities available to market participants.
You can access the document reflecting the situation as of June 12, 2026 (he link to the document is provided below).
Please note that the capacity direction (entry/exit) specified in the document is presented from the perspective of the TSO or LTO performing the relevant maintenance or repair works. For example, defect elimination in the Riga–Panevėžys gas pipeline, carried out by Conexus Baltic Grid, limits the entry capacity at Kiemėnai from the Conexus Baltic Grid perspective (LT->LV). Consequently, this also limits the exit direction capacity from the Amber Grid perspective (LT->LV).
Any updates to the Consolidated Maintenance Works Plan made after 12 June 2026 will first be published as Urgent Market Messages (UMMs).
For the most up-to-date information and technical capacity values, please refer to the ENTSOG Transparency Platform.
To ensure access to the latest information, please regularly monitor the following information channels:
- Conexus Baltic Grid https://conexus.lv/maintenance-works-and-capacity-interruptions
- ENTSOG Transparency Platform https://transparency.entsog.eu/#/map
- Amber Grid https://ambergrid.lt/en/for-clients/transmission-system/maintenance-works-plan/741