№10|2011

PIPELINE RECONSTRUCTION

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UDC 69.055.5:628.147.25:628.247

KOSYGIN A. B., Khanin V. N., FOMINA I. V., Baranov S. V., Korabelnikov T. V.

Instrumental monitoring of water and sewage networks construction in Moscow

Summary

In order to improve the operation reliability in 2005 Technical Diagnostics Centre of MPUE Mosvodokanal was established. The main challenges of the Centre were determined as follows: improving water and sewage network operation reliability, elimination of pipeline failures by testing the technical state and protecting from electrochemical corrosion. For this purpose the analysis of the underground pipeline integrity by inspection is carried out. Diagnostic measures beside TV inspection include testing the presence of ground current and soil corrosion, ultrasound diagnostics, testing insulation coating, ultrasonic thickness measuring etc. Upon the completion of diagnostics specific measures for each case are developed, and programs of network reconstruction and relaying are compiled. The quality of construction and reconstruction has a direct impact on the subsequent pipeline operation. Therefore instrumental monitoring of construction works is a necessary attribute in ensuring reliable operation of water and sewage networks. The advanced monitoring methods such as TV inspection of the inner surface; ultrasound and X-ray control; axial tension testing of the welded joints, control of the insulating coating provide for the improvement of the quality of the old pipeline rehabilitation and new pipeline construction.

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