skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Evaluation of stresses in large diameter, thin walled piping at support locations

You are accessing a document from the Department of Energy's (DOE) OSTI.GOV. This site is a product of DOE's Office of Scientific and Technical Information (OSTI) and is provided as a public service.

Visit OSTI to utilize additional information resources in energy science and technology.

Abstract

The highest stresses in many thin walled piping systems are the local stresses at the pipe supports. These secondary stresses are caused by saddles or other structural discontinuities that restrain pipe ovalization. A static analysis of a thin walled pipe supported on structural steel saddle under dead weight loading is presented. The finite element analysis is performed using a shell model with distributed gravity and hydrostatic pressure loading. Parametric studies on global and local stress are performed to determine the effect of the pipe diameter to thickness ratio. Two aspects of the saddle design are also investigated: the effect of saddle width, and the effect of saddle wrap angle. Additionally, the computed stresses are compared to closed form solutions.

Authors:
; ;
Publication Date:
Research Org.:
Westinghouse Savannah River Co., Aiken, SC (United States)
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
6441473
Report Number(s):
WSRC-MS-92-369
ON: DE93011779
DOE Contract Number:
AC09-89SR18035
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; PIPES; STRESS ANALYSIS; COOLING SYSTEMS; FINITE ELEMENT METHOD; STATIC LOADS; SUPPORTS; CALCULATION METHODS; MECHANICAL STRUCTURES; NUMERICAL SOLUTION; 220200* - Nuclear Reactor Technology- Components & Accessories

Citation Formats

Bryan, B.J., Flanders, H.E. Jr., and Rawls, G.B. Jr.. Evaluation of stresses in large diameter, thin walled piping at support locations. United States: N. p., 1992. Web. doi:10.2172/6441473.
Copy to clipboard
Bryan, B.J., Flanders, H.E. Jr., & Rawls, G.B. Jr.. Evaluation of stresses in large diameter, thin walled piping at support locations. United States. doi:10.2172/6441473.
Copy to clipboard
Bryan, B.J., Flanders, H.E. Jr., and Rawls, G.B. Jr.. Wed . "Evaluation of stresses in large diameter, thin walled piping at support locations". United States. doi:10.2172/6441473. https://www.osti.gov/servlets/purl/6441473.
Copy to clipboard
@article{osti_6441473,
title = {Evaluation of stresses in large diameter, thin walled piping at support locations},
author = {Bryan, B.J. and Flanders, H.E. Jr. and Rawls, G.B. Jr.},
abstractNote = {The highest stresses in many thin walled piping systems are the local stresses at the pipe supports. These secondary stresses are caused by saddles or other structural discontinuities that restrain pipe ovalization. A static analysis of a thin walled pipe supported on structural steel saddle under dead weight loading is presented. The finite element analysis is performed using a shell model with distributed gravity and hydrostatic pressure loading. Parametric studies on global and local stress are performed to determine the effect of the pipe diameter to thickness ratio. Two aspects of the saddle design are also investigated: the effect of saddle width, and the effect of saddle wrap angle. Additionally, the computed stresses are compared to closed form solutions.},
doi = {10.2172/6441473},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}
Copy to clipboard
Technical Report:
View Technical Report (0.56 MB)
DOI:  10.2172/6441473
Save / Share:
Export Metadata
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.

  • ; ;
    The highest stresses in many thin walled piping systems are the local stresses at the pipe supports. These secondary stresses are caused by saddles or other structural discontinuities that restrain pipe ovalization. A static analysis of a thin walled pipe supported on structural steel saddle under dead weight loading is presented. The finite element analysis is performed using a shell model with distributed gravity and hydrostatic pressure loading. Parametric studies on global and local stress are performed to determine the effect of the pipe diameter to thickness ratio. Two aspects of the saddle design are also investigated: the effect ofmore » saddle width, and the effect of saddle wrap angle. Additionally, the computed stresses are compared to closed form solutions.« less

  • ; ;
    The EPRI Research Project 2967-2 has set its fundamental goal to be the development of realistic guidelines and criteria for piping and pipe support design and evaluation. The focus is on items that are most critical to utilities and consists of a variety of tasks relating to piping and pipe support design. One objective of this report is to summarize the recommendations from the seven task reports of the first phase of the project and to provide examples of how to use those recommendations. Criteria and methods for evaluating both short and long term system operation are addressed. Benefits gainedmore » from applying the recommendations to actual systems are discussed. The report also reviews other work currently being done within the nuclear industry and assesses the impact of that work on the recommended criteria/methods of this project. The second objective of the report is to discuss possible changes needed in the governing codes or licensing commitments in order to implement the recommendations. Finally, the report describes further research which can be done to advance the criteria presented and answer questions concerning applicability of the proposed criteria to designs not tested/investigated. The basic conclusion reached in the project is that many of the criteria/methods used today in piping analysis/design are overly conservative. The report`s conclusion is supported by extensive literature searches, tests, and analyses. The report presents a robust source of reference to utilities which wish to implement changes in criteria and methods. Most of the criteria and methodologies described in the seven task reports and summarized in the following sections will require some effort in licensing or Code changes.« less

  • ; ;
    A 16-inch gas pipeline, operating at 285 psig near Racine, Wisconsin was studied for a 2-year period to determine the effects of environmental changes and external loads on the soil-pipe system. Three locations were selected where the pipe ran beneath a concrete pavement. These locations were representative of shallow, normal, and deep depth-of-cover conditions. Extensive soil and pipe instrumentation were applied and monitored regularly at first, and continuously subsequently, when automatic data-logging equipment came available.