T/CI 080-2022 Intelligent tube plugging repair technology specification

Scope

Scope: This document specifies the technical requirements and precautions for the National Pipeline Network South China Branch to use intelligent sleeve repair technology to repair and monitor the repair effect of oil pipeline defects; This document applies to oil pipelines owned by the National Pipeline Network South China Branch, and is suitable for the intelligent sleeve repair and monitoring of pipeline defects caused by non-leakage defects such as corrosion, grooves, cracks, depressions, welding defects (except for ring welds), wrinkles, and buckling in pipelines; Main technical content: - Epoxy injection technology for sleeve is mainly used to restore the pressure-bearing strength of various steel pipeline defects. For such defects, a steel sleeve is installed on the outer surface of the pipeline defect, with a certain annular gap maintained between the sleeve and the pipeline. Both ends of the annular gap are sealed with glue, and epoxy filling glue is injected into this sealed space to form a composite sleeve, which reinforces the pipeline defect. - The inner wall of the intelligent sleeve is reserved with a strain gauge installation groove for later strain gauge installation, enabling stress monitoring of the pipeline defect and epoxy filling agent. 3.2 Sleeve The sleeve used in the intelligent sleeve repair technology for pipeline defects can be fitted on steel pipelines, with epoxy injected between the pipeline and the sleeve. The sleeve includes welded and flanged types. 3.3 Epoxy Resin The epoxy resin material used for repair injection is mixed from a base material and a curing agent in a certain proportion. The base material components include: epoxy resin, modified rubber elastomer, epoxy-modified polyurethane elastomer, and inorganic fillers treated with coupling agents. The curing agent components include: modified aliphatic amine curing agents, polyamide curing agents, and modified aliphatic amine curing agents. 3.4 Defect Repair

Development Information

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