Stress Analysis

Kiefner and Associates, Inc. has the capability to conduct stress analysis for pipeline systems and associated equipment for thermal, mechanical, soil movement, dynamic, and other loadings on pipe, vessels, and mechanical equipment. Our understanding of failure mechanisms (including fracture mechanics) and materials, of the implications of stresses and defects, and of applicable codes and standards permits the rational calculation of appropriate load or stress limits. We can help identify the cause of failure and recommend appropriate remedies which will avoid its recurrence. We also have the ability to analyze aboveground piping systems for stresses to see that they comply with applicable piping codes and regulations. Some applications we provide include:

• Development of safe procedures for lifting or lowering pipelines while in service
• Monitoring and mitigating the effects of ground movements
• Specifications of temporary support spacing for excavated piping especially for cases involving corroded pipe or possible defective girth welds
• Development of response plans and on-site assistance for mitigating the effects of long-wall mining operations under a pipeline
• Development of response plans to address settlement of pipelines and storage tanks
• Flexibility analysis of complex piping systems and optimum placement of piping supports
• Assessment of localized defects or anomalies on remaining pipe strength for fitness of purpose evaluations