Application of laser scanning for stress-strain detection of pipe spools and interpretation of geometry defects

UDK: 622.692.4

DOI: 10.24887/0028-2448-2025-12-144-148

Key words: pipeline, ground laser scanning (GLS), piping spool, bending radius, laser reflection point (LRP)

Authors: A.I. Baryshev (The Pipeline Transport Institute LLC, RF, Moscow); Т.I. Kuznetsov (The Pipeline Transport Institute LLC, RF, Moscow); E.A. Pokrovskaya (The Pipeline Transport Institute LLC, RF, Moscow)

The bending radius of a pipe spool is one of the main parameters characterizing the stress-strain state of a pipeline. Diagnostic examination with inline inspection tools ensures the detection of spools with non-standardized bending radius. The paper describes a method for determining pipeline axis bending radius using ground laser scanning (GLS). This approach not only ensures high precision of determining the value of pipeline axis bending radius, but also enables determining the pipeline axis bending plane. Automation of measurement result processing ensures timely processing of GLS data and clarification of technical solutions to bring a pipe spool into a standardized state during actual work execution, when opening a pipe spool. The method described enables measuring the actual radius within the ranges of 50 m to 2500 m and more, the bending directions of opened pipe spools from 0 to 360° with an accuracy of at least 1%. Apart from determining pipeline axis bending parameters, GLS data is used to determine the dimensions of geometry defects, such as corrugations, dents, and skewed joints. When cutting out a spool on a pipeline, the use of GLS enables assessing the stress-strain state of the pipeline before cutting, and measuring the coaxiality of pipe spools after spool cutting. The GLS technology enables replacing the classical geodesic measurement methods during work execution, as-built surveying and, at the same time, ensuring the acquisition of high-precision pipe spool geometry data providing timely identification of pipeline deformations.

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