PECULIARITIES OF MAIN PIPE DAMAGE ESTIMATION WITH 'STRATIFICATIONS', DISCOVERED BY INNER-TUBE DIAGNOSTICS
The carried out experiments have shown, that the pipe strength with 'the rolled out discontinuity', 'the notch' or 'the corrosion pit' above the 'stratification' might be estimated as a strength of the pipe with the nominal wall width equals to the distance from the inner surface to the first terrace of 'stratifications', which was discovered by DDK, and situated below the defect. While doing this the eventual local decrease of the exploitation material characteristics should be considered.