Окружное напряжение от рабочего внутреннего давления в трубопроводе

Abstract

Background Currently, calculations of pipelines strength are performed by the limit-state method in accordance with applicable building codes and regulations, as well as the standards of domestic and foreign enterprises. They have one commom peculiarity - the results of these calculations are not associated with quantitative assessment of risk - the probability of failure (failure rate). Meanwhile, the designers had the impression that the limit-state method of pipelines durability calculation is so scientifically justified and has been developed in details, so it excludes the very formulation of the question of the quantitative risk assessment. Moreover, the standard GOST R 52079-2003 about pipes for pipelines covers restrictions on the circumferential stress caused by operating pressure without reference to the categories of pipelines and the risk of accidents. Basically, any calculation of the strength of the pipeline must be accompanied by a quantitative assessment of reliability. It is dictated by a need to justify the safety of the operated pipeline. Aims and Objectives The aim is to ensure the reliability of trunk pipelines by establishing allowable hoop stress from internal operating pressure taking into account the pipeline section category and accident hazard. Methods Deterministic, probabilistic and statistical methods, based on the strength and reliability of the design. Conclusion There were figured out the the numerical value of the coefficient θ based on a given probability of reliability and categories of trunk pipeline sections.