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ASME B31J-2017 pdf free

ASME B31J-2017 pdf free.Stress Intensification Factors (i-Factors),Flexibility Factors (k-Factors), and Their Determination for Metallic Piping Components.
The ASME B31 Code for Pressure Piping and the ASME Boiler and Pressure Vessel Code, Section III, Nuclear Components. Subsections NC and ND piping rules require the use of stress intensification factors (SIFs or i-factors) and flexibility factors (k-factors) when checking the adequacy of components and joints (welded and nonwelded) in piping subject to various loads, including cyclic loads, that may produce fatigue failures. As used herein, where the word Code Is used without specific identification, it means the Code that incorporates or references this Standard. Experimental methods to determine SIFs, flexibility factors, and sustained load factors are provided in the Nonmandatory Appendices. Compiled stress Intensification and flexibility factor equations for common piping components are included in Table 1-1; see also Tables 1-2 and 1-3 and Figures 1-1 through 1-7.
2 Definitions
flexibility factor: for branch connections and reducers, a ratio that defines the rotation of one end of a zero- or negligible-length element with respect to the opposite end of the same element when equal and opposite moments are applied at each end; for bends, a factor based on an effective length of matching pipe that increases the element flexibility to simulate the effect of bend ovalization that applies over the entire arc length of the bend.
i-factor: same as the stress intensification factor. k-factor: same as the flexibility factor.
pipe stress analyst: individual responsible for the accuracy of i-factors, k-factors, and sustained load factors used in the analysis of the piping system
pipin,q components: mechanical elements suitable for joining or assembly into pressure-tight, fluid-containing piping systems. Components include pipe, tubing, fittings, flanges, gaskets, bolting, valves, and devices such as expansion joints, flexible joints, pressure hoses, traps. strainers, in-line portions of instruments, and separators.
stress intensification factor (SIF): a piping component fatigue strength factor that is the ratio of the elastically calculated nominal stress in matching pipe that causes a through-wall crack to appear in a given number ofcycles in a straight pipe butt weld to the elastically calculated nominal stress in the matching pipe used with the component that produces a through-wall crack in the same number of cycles in the component or attached pipe.
verified numerical analysis: typically, a finite element analysis of a particular piping system component whose results have been verified against existing test data.
3 Document Contents
(a) Several different types of tests are often conducted on metallic piping components by the manufacturer or user of a piping component to demonstrate Code adequacy. These tests include burst tests, load-deflection tests (k-factor tests), SIF tests (i-factor tests), and sustained load tests. Multiple tests may be performed on the same specimen. For example, SIF tests can follow multiple k-factor tests, and sustained load tests can often follow SIF tests when the specimen has been suitably repaired.ASME B31J pdf free download.

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