Source: Bulgartransgas EAD - DVGW

Requirements to the Gas Pipeline Networks
The gas networks and related facilities secure the transportation of gas to the various
consumers in the built-up area. In accordance with the indicators for gas supply
quality the networks are to meet the following basic requirements:
high reliability and continuity of gas supply to the consumers according to
their category;
safe and efficient operation;
precise measuring of the gas flow and gas quantities sold to the consumers
controlled gas quality, and odorizing, securing safety of use;
optimal configuration and degree of pressure regulation;
optimal overhaul and operational costs;
environmental protection;
optimal matching to the infrastructure of built-up areas;
ensured protection against third party interference;
monitoring and control of network parameters through automated
information management system including identification of pre-emergency
and emergency modes.