| 摘要 |
FIELD: machine building. ^ SUBSTANCE: procedure consists in measurement of values of protection potentials Un of pipeline relative to corresponding reference electrodes in n control points along pipeline at specified space step. On base of these values there is determined condition of corrosion in the main. Also, values of protection potentials Un in a controlled section of the pipeline are measured m times, where mëÑ10 in each control point n in specified time interval, with successive determination of histograms of distribution of measured values Un in each control point n. Further, using plotted histograms, there is determined percent ratio n of values of protection potential to common number m of performed measurements for values Un. There are plotted histograms of per cent ratios n for each point n. There are established values n beyond the specified interval (UhnÇUln) of allowed values, where Uhn and Uln are high and low allowed values of the specified interval of allowed values in point n. If value n exceeds specified threshold value thresh in any control point, there is diagnosed presence of corrosion danger of the main in the given control point. ^ EFFECT: increased reliability of control of corrosiveness in places of main contiguity. ^ 8 cl, 2 dwg |
