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Author(s), Sam Kannappan, P. E.. Publisher, Wiley. Date, Pages, Format, pdf. Size, 22 Mb. D O W N L O A D. Introduction to Pipe Stress Analysis-Sam Kannappan Home · Documents; Introduction to Pipe Stress Analysis-Sam Kannappan Introduction to Pipe Stress Analysis [Sam Kannappan] on bestthing.info *FREE* shipping on qualifying offers. Pipe Stress Analysis is analyzing the hot and large .
In some cases, the failure can be catastrophic, causing the collapse of the system and with the potential for loss of life and property. Some situations may even require the entire plant to be shut down. Thus, the objective of pipe stress analysis is to ensure the safe operation of piping systems within a plant, while simultaneously meeting the performance requirements of the plant.
Overstressing in piping can result in the following: Permanent deformation of the piping. Cracking and breakage of piping. Degradation of material with time.
Kannampan Pipe Stress-001
Higher creep rate resulting in premature piping failure. Excessive plastic deformation leading to failure. Fatigue related failures due to cyclic loading.
In general, overstressing can result from many different sources.
Common examples include inadequate input such as insufficient pipe thickness, over-constraint, excessive thermal expansion or presence of other loads.
The remedy for overstressing can be both, to add or in certain instances remove constraints such as releasing degrees of freedom of pipe supports or hangers. Although this process is often carried out on a trial and error basis, major piping layout related problems can usually be anticipated by experienced piping engineers during the design stage itself.
Fundamental physical parameters used in stress analysis: Force, stress, strain, modulus of elasticity and linear coefficient of thermal expansion 1. It can be defined as a push or pull on an object resulting from its interaction with another object.
INTRODUCTION TO PIPE STRESS ANALYSIS
Force is no longer experienced when this interaction ceases. The requirements are not applicable to branch connections in which the smaller angle between branch and run is less than 45 degrees. The nomenclature below is used in the pressure design of welded branch connections.
It is illustrated in Fig. For welded pipe, when the branch does not intersect the longitudinal weld of the run, the basic allowable stress S for he pipe sec Appendix A3 may be used in determining I" for the purpo Roinforcements lor Welded Branch Connections 31 of reinforcement calculation only.
Whc n the branch does intersect the longitudinal weld of the run, the allowable stress SEq ot the run pipe shall be used in the calculation. The allowable stress SEq of the branch shall be used in calculating lb. The area lying within the reinforcement zone resulting from any excess thickness available in the run waH: 2.
Materials used for reinforcement may differ from those of the run pipe, provided they are compatible with the run and branch pipes with respect to weldability.
Introduction to Pipe Stress Analysis by Kannappan
Material of piping. Expansion coeffcient, Young's modulus, and material density will be selected for this material. Insulation thickness and insulation material.
If not given, standard thickness for calcium silicate will be selected. Specifc gravity of contents 6. Any wind load to be considered?
If yes, the direction of application is important. Any anchor initial translation. For towers, exchangers, and so on, nozzle initial ranslation is important.
Introduction To Pipe Stress Analysis Sam Kannappan
Corrosion allowance for piping 9. Standard valve weight and fange weight will be used.
For special valves mark the weight on pipe stress isometric.When two or more openings are to be provided with a combined reinforcement. Try Gwen. Force is no longer experienced when this interaction ceases.
Example A 10 in. Common examples include inadequate input such as insufficient pipe thickness, over-constraint, excessive thermal expansion or presence of other loads.
Overstressing in piping can result in the following: Permanent deformation of the piping. An attempt is also made to obtain a clear understanding of the fundamental physical parameters used in stress analysis such as force, stress and strain and modulus of elasticity.
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