Improvement of the Methods of Estimating the Expected Frequency of Accidents at the Gas Pipelines Based on the Results of its Approbation in OOO Gazprom transgaz Yekaterinburg


Annotation:

Regulatory and methodological documents developed by Rostechnadzor and PAO Gazprom considering the experience of the world best practices for ensuring industrial safety, preventing accidents and work injuries serve as a basis for implementation of the up-to-date and innovative methods for planning diagnostics, maintenance and repair of linear part of the main gas pipelines.
In accordance with the regulatory-methodical documents, the long-term programs for diagnostics, maintenance and repair of the linear part of the main gas pipelines should be based on the quantitative assessment of not only the reliability indicators but also the technogenic risk of sections of the main gas pipelines.
According to the normative and methodological documents the quantitative risk analysis includes the assessment of the expected frequency of accidents, which consists in identifying for each source of hazard in the scope of hazardous production facility the frequency of potential accidents occurrence.
The methods of expert evaluation of the expected frequency of accidents at the gas pipeline section is aimed at predicting the accident rate (identifying the expected specific frequency of accidents) at the arbitrary section of the gas pipeline of the finite length, which is characterized by the specific set of factors and operating conditions.
General provisions formulated by the specialists of OOO Gazprom transgaz Yekaterinburg are presented on the basis of the approbation of the methodology of PAO Gazprom for assessment of accidents frequency at the sections of gas pipeline. When identifying the expected specific frequency of accidents, the split of the gas pipeline per sections is proposed to be made on each of the factors of influence separately considering its importance and the nature of change along the pipeline route.
As a required condition for obtaining adequate estimates of the expected specific frequency of accidents and the risk for the analyzed pipeline, the condition is formulated concerning the permanency of the expected frequency of accidents calculated for the entire pipeline route on each separate factor of influence regardless the way of splitting the route into sections.
The presented provisions can be applied to any hazardous production facilities having large linear length.

Yu.A. Bondin, Lead Engineer, iury.bondin@urfu.ru S.V. Bausov, Chief Mechanical Engineer — Department Head of Chief Mechanical Engineer OOO Gazprom transgaz Yekaterinburg, Yekaterinburg, Russia S.V. Ovcharov, Cand. Sci. (Eng.), Laboratory Head OOO Gazprom VNIIGAZ, Moscow, Russia

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DOI: 10.24000/0409-2961-2018-9-31-38
Year: 2018
Issue num: September
Keywords : industrial safety hazardous production facility risk analysis gas pipeline maintenance and repair influence factor expected frequency of accidents
Authors: