Pipeline integrity management is one of the main areas of development at CCPGE. As Dr. Duan, CCPGE’s pipeline integrity expert, pointed out at CIPC 2021 in Beijing, pipeline integrity management should be more than just a fitness-for-service assessment and repairs during the pipeline’s operating stage: It must be a management strategy that applies throughout the pipeline’s service life cycle, beginning with the design stage, through construction and operation, all the way to decommissioning. At CCPGE, for integrity management, we help implement code requirements and more detailed, company-specific procedural requirements.
Pipeline integrity assessment involves various technical aspects including pipeline stress/strain design methodology, material qualification, girth weld quality, corrosion, and environmental stress cracking.
Pipe stress /strain based design
Typical stress-based design of pipelines does not properly consider ground conditions that may cause pipe uplift and pipe floating in muskeg areas, as well as pipe-soil interactions and soil ratcheting. These problems can be resolved effectively by partially introducing strain-based design methodology.