T/CI 081-2022 Active

Scope: This document specifies the technical content of the identification of geological disaster-sensitive areas, disaster monitoring, data analysis, and safety evaluation reports for oil pipelines owned by the South China Branch of National Pipeline Network Corporation. This document applies to the strain monitoring of buried pipelines in geological disaster-impacted areas of oil pipelines owned by the South China Branch of National Pipeline Network Corporation. Main technical content: 4. Selection of geological disaster-sensitive points 4.1 Identification of geological disaster risk points 4.1.1 Identification of geological disaster risk points shall be carried out based on comprehensive on-site geological data, with a thorough identification of pipeline geological disasters, especially those caused by geological disasters such as excavation subsidence during urban infrastructure construction. 4.1.2 Comprehensive on-site geological data includes geological disaster assessment, geological survey reports, disaster prevention and control design, geological disaster formation conditions, external influencing factors, etc. 4.1.3 Firstly, identify the types of geological disasters along the pipeline and the main existing problems, and promptly form records and archives. 4.1.4 The main forms of pipeline disasters include gullies, landslides, debris flows, collapses, faults, ground fissures, and ground subsidence. 5. Installation of geological disaster monitoring systems 5.1 Basic requirements Pipeline strain monitoring shall be safe and reliable, and comply with the requirements of this chapter. 5.2 Main contents of geological disaster pipeline strain monitoring 5.2.1 The circumferential strain, axial strain, and 45° directional strain, as well as their increments, generated by internal pressure, self-weight, and other loads on the pipeline. 5.2.2 The shear angle (shear strain) when the pipeline undergoes torsional deformation. 5.2.3 Test results data table. Through the