Design of Ductile Iron Pipe on Supportsby Richard W. Bonds, Ductile Iron Pipe Research Assoc, United States,
Abstract: Design procedures for ductile iron pipe in normal underground service have been well established. The standard design considers hoop stresses in the pipe wall due to internal hydrostatic pressure as well as bending stresses and deflection in the pipe due to external loads of earth and traffic above the buried pipe. In some situations, it is necessary or desirable to use supports at designated intervals along pipelines. Aboveground, supported pipe is needed to transport water and other fluids within treatment plants and buildings. This paper reviews the pertinent design considerations for both aboveground and underground Ductile Iron pipe-on-supports installations. Specific procedures, recommended design limits, and allowable stresses are outlined. Design tables based on ductile iron pipe data and suggested loads are also provided.
Subject Headings: Allowable stress design | Buried pipes | Cast iron | Walls | Load factors | Pipeline design
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