Chapter B4: Stress Analysis of Piping Systems (Free PDF)


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Piping stress analysis is a discipline which is highly interrelated with piping layout (Chap. B3) and support design (Chap. B5). The layout of the piping system should be performed with the requirements of piping stress and pipe supports in mind (i.e., sufficient flexibility for thermal expansion; proper pipe routing so that simple and economical pipe supports can be constructed; and piping materials and section properties commensurate with the intended service, temperatures, pressures, and anticipated loadings). If necessary, layout solutions should be iterated until a satisfactory balance between stresses and layout efficiency is achieved. Once the piping layout is finalized, the piping support system must be determined. Possible support locations and types must be iterated until all stress requirements are satisfied and other piping allowables (e.g., nozzle loads, valve accelerations, and piping movements) are met. The piping supports are then designed (Chap. B5) based on the selected locations and types and the applied loads.

This chapter discusses several aspects of piping stress analysis. The discussion is heavily weighted to the stress analysis of piping systems in nuclear power plants, since this type of piping has the most stringent requirements. However, the discussion is also applicable to the piping systems in ships, aircraft, commercial buildings, equipment packages, refrigeration systems, fire protection piping, petroleum refineries, and so on. Each of these types of piping must meet the requirements of its applicable code.

Content:-
1. FAILURE THEORIES, STRESS CATEGORIES, STRESS LIMITS, AND FATIGUE
2. CLASSIFICATION OF LOADS, SERVICE LIMITS, AND CODE REQUIREMENTS
3. STRESS INTENSIFICATION FACTORS (SIF) FOR NONSTANDARD FITTINGS
4. LOCAL STRESSES
5. ANALYSIS OF INTEGRAL WELDED ATTACHMENTS (IWA)
6. TYPES OF PIPE LOADING CONDITIONS
7. METHODS OF ANALYSIS
8. PROCEDURES FOR THE DESIGN OF RESTRAINED UNDERGROUND PIPING
9. REFERENCES

Author Details
"C. Basavaraju", P.E. Senior Engineering Specialist Bechtel Power Corporation Frederick, Maryland.

"William Saifung Sun", P.E. Senior Engineering Specialist Bechtel Power Corporation Frederick, Maryland.




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