M. : Nedra Business Center, 2003. — 291 s. : il. Some physical aspects of the formation of the dispersion of damage in pipe steels and their welded joints during long-term loading are considered, taking into account the operating conditions. Based on the revealed patterns of reducing the characteristics of crack resistance in two-phase steels of the ferrito-perlite class, a method for recording changes in the physical and mechanical characteristics of the metal of pipelines in the zones of structural, technological and operational stress concentrators without stopping the load is proposed. The basic physical principles on which the most frequently used methods of non-destructive control of the solidity of metal of welded structures are based and the limits of their optimal application are given. Calculation-experimental methods for estimating the residual resource of shell structures at the limiting state with crack- and non-crack-like stress concentrators . are proposed. For engineering and technical workers of oil and gas industry, students, postgraduates, undergraduates and researchers of higher educational institutions of oil and gas profile .