Local pressure stresses on lateral pipe-nozzle with a 45° degree angle intersection

Document Type

Article

Publication Date

12-1-1997

Abstract

This paper presents a comprehensive analysis of the local pressure stress data around a pipe-nozzle juncture with a 45 degree angle of intersection. The resulting circumferential and longitudinal stresses on the pipe are first normalized as local stress factors which are then plotted as functions of beta, ß, (nozzle mean radius/pipe mean radius) and gamma, γ, (pipe mean radius/pipe thickness). For the numerical computation of the stresses, the range of beta, ß, is from 0.1, to 1.0, and gamma, γ, from 10 to 300. Through the ALGOR finite element analysis program, comprehensive convergence studies were made for boundary parameters, such as αp (pipe length/ pipe mean radius) and αn (nozzle length/nozzle mean radius), the optimized numbers of nodes around the pipe-nozzle juncture, and total number of elements of the model. Twelve (12) plots of local pressure stress factor plots are provided in this paper which allows local stress calculation at all eight locations around the pipe-nozzle juncture that may be combined with stresses resulting from other external loadings as described by the Welding Research Council Bulletin # 107. In this paper a numerical example for the pressure stresses with beta of 0.7 and gamma of 100 is given.

Identifier

0030683053 (Scopus)

Publication Title

American Society of Mechanical Engineers Pressure Vessels and Piping Division Publication PVP

ISSN

0277027X

First Page

15

Last Page

18

Volume

356

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