**4. Conclusion**

The above data (pp. 1–3) allow you to build a comprehensive strength analysis system using deterministic, statistical, and probabilistic methods for various components, taking into account design, technological, and operational factors.

Deterministic strength calculations are used as part of regulatory national and international approaches for design calculations. They apply to the majority of functioning oil pipelines systems.

Statistical calculations become relevant in cases where during operational process the diagnostic studies of the condition of pipelines are carried out or during construction routine tests and during operation defects of technological and operational origin are detected. Probabilistic calculations are necessary on the most dangerous sections of the pipeline (in case of crossing water barriers, transport infrastructures, and laying offshore pipelines).

In all cases, safety margins are linked to the normative standard documentation (deterministic approach), the results of diagnostics and defect identification and measurement (statistical approach), and taking into account the most dangerous operating conditions (probabilistic approach).
