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Transmission system

  • Legend
  • Border transfer station
  • Compressor station
  • Border transfer station abroad
  • Compressor station abroad
  • Transit pipeline
  • Intrastate pipeline

NET4GAS operates pipelines for international transit and national transmission of natural gas with a total length of more than 3,800 km, with nominal diameters from DN 80 to DN 1400 and nominal pressures from 4 to 8.4 MPa.

The required gas pressure in the pipelines is provided at compressor stations (CS). These are CS Kralice nad Oslavou and CS Kouřim on the northern line, and CS Břeclav and CS Veselí nad Lužicí on the southern line. Total installed capacity of the compressor stations amounts to 243 MW.

Individual branches of the system are interconnected at key junction points Malešovice, Hospozín, Přimda and Rozvadov. The interconnection points of the lines are both the compressor stations and line shut-off valve stations. 

Natural gas is accepted and delivered at the entry into and exit from the Czech Republic, i.e. its volume and quality are measured at border transfer stations between the Czech Republic and Slovakia in Lanžhot, between the Czech Republic and Germany in Hora Svaté Kateřiny – Sayda, in Hora Svaté Kateřiny - Olbernhau, in Waidhaus and Brandov (from the OPAL system during normal operation entry into the Czech Republic and exit from the Czech Republic into the STEGAL system). Between the Czech Republic and Poland, gas is measured at BTS Cieszyn. 


Northern branch

Southern branch

Compressor station

Kralice Kouřim  Břeclav Veselí n/L 

Number of turbine units

5x 6 MW  5x 6 MW 9x 6 MW  9x 6 MW 
2x 13 MW 2x 13 MW  1x 23 MW   

Installed capacity of CS

 56 MW 56 MW  77 MW  54 MW 

Total installed capacity for transmission

243 MW

Natural gas from the transmission system is further transferred via 94 transfer stations into the distribution systems, facilities of directly connected customers and gas storage facilities. Commercial metering of gas quantity is installed at all transfer stations. Gas quality is measured at 23 nodal points of the system.

For detailed information about NET4GAS transmission system read The Czech Ten Year Network Development Plan in the section Development plans.