Monitoring of mechanisms of formation of corrosive aggressiveness of soils and grounds of underground gas pipeline routes and on its basis assessment of service life of gas pipes in various soil-climatic zones

Abstract

The experience of studying the problem of corrosive aggressiveness of soils and grounds in terms of improving the reliability of Gazprom’s pipeline systems operation is summarized and presented. Soil factors causing surface corrosion of gas pipelines in soil conditions are studied. Based on the obtained results, it was suggested to evaluate not only the corrosive aggressiveness of soils and the gas pipe lifetime, but also the corrosive resistance of pipe metal in corrosive environments. Special attention is paid to the stress corrosion cracking formation mechanism.

Soil cryogenesis as a natural risk factor for gas pipelines in the permafrost zone during modern warming

“…On the other hand, the obtained chemical, physicochemical and biological characteristics of the corrosion aggressiveness of soils and grounds did not provide reliable information for the development of technology to increase the service life within a certain soil-climatic zone. Application of the results obtained for a different soil-climatic zone does not lead to the desired result, as evidenced by numerous data [1]. However, it has been shown that the intensity of corrosion process development is largely determined by the temperature conditions of the soil and the temperature of the pumped gas.…”