Independent validation of in-line inspection performance specifications

摘要

Understanding the capabilities of available in-line inspection tools is a key component of accurately managing and assessing pipeline integrity. Det Norske Veritas, USA, (DNV) was retained by a pipeline operator to provide support in evaluating the Quest Integrity Group (Quest) InVista tool.The Quest InVista tool is a straight-beam ultrasonic tool that is capable of detecting and sizing dents, metal loss, and dents with metal loss.This multiple-phase project evaluated the performance of the inspection tool against its stated capabilities.The Quest InVista tool is an emerging technology and was designed to navigate tight bends (up to ID) and back-to-back bends. By running this test the operator gained an independent verification of the performance specifications of a new inspection technology.To evaluate the InVista tool DNV: created a list of defects to be used for testing the tool; manufactured the defects on test sections of pipe; supervised the testing of the test sections; and reported the results of the testing. Each stage of the project is reviewed in detail in this paper.