METHOD OF ASSESSING TECHNICAL CONDITION OF INSULATING COATING OF UNDERGROUND PIPELINE SECTION Russian patent published in 2020 - IPC G01V3/02 G01R27/02 F17D5/02

Abstract RU 2720647 C1

FIELD: measurement technology.

SUBSTANCE: invention relates to assessment of technical condition of external insulating coating of underground pipelines. Essence: on the main pipeline the area of insulating coating state control between two control points is selected. Operation modes of two cathodic protection stations (CPS) adjacent to the selected section are varied and coefficients of its influence on the value of protective difference of potentials "pipe-ground" at the control point are found. Characteristic resistance is found in selected section (Z) by formula

where A₂₁ is coefficient of current CPS No. 2 influence on protective difference of potentials "pipe ground" in control point 1; A₁₁ is coefficient of current CPS No. 1 influence on protective difference of potentials "pipe ground" in control point 1; A₁₂ – coefficient of current CPS No. 1 influence on protective difference of potentials "pipe ground" in control point 2; A₂₂ is coefficient of current CPS No. 2 influence on protective difference of potentials "pipe ground" in control point 2; by value of which state of insulating coating is determined.

EFFECT: shorter time for assessing the technical state of the insulating coating, enabling remote determination of the state of the insulating coating.

1 cl, 1 dwg

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RU 2 720 647 C1

Authors

Nikulin Sergej Aleksandrovich

Karnavskij Evgenij Lvovich

Dates

2020-05-12—Published

2019-11-25—Filed