Source: Bulgartransgas EAD - DVGW

Maintenance of Gas Networks
The Preventive Maintenance(PM) System for gas distribution networks is
statutorily well regulated.
The statutory requirements are entirely based on:
the recommendations of the equipment manufacturers and the experience
from its operation;
the specific
qualification;
operational conditions and the actual staff
the actual technical state of the equipment and logistics;
their resource use rate;
technological systems and impact of reserve on reliability,
schedule and emergency stoppages,;
their repercussions and related repair costs;
the indicators of the pipeline system functioning as well.
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