Дослідження впливу грунту на виявлення дефектів ізоляційного покриття підземних трубопроводів

摘要

The problems that may arise during buried pipelines coating testing are described.The analytical model of dependence between soil resistivity and phase displacement of the signal isachieved. The diagrams of phase displacement variance depending on disbondment insulatedcoating capacity for buried pipelines which are located in different types of soils while measuringon frequencies of 8 and 33 kHz are obtained.