Abstract： ASME B31J:017 pdf download.Stress Intensification Factors (i-Factors),Flexibility Factors(k-Factors), and Their Determination for Metallic Piping Components. stress intensification factor (SIF): a piping component fatigue strength factor th...

ASME B31J:017 pdf download.Stress Intensification Factors (i-Factors),Flexibility Factors(k-Factors), and Their Determination for

Metallic Piping Components.

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 Lest 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.

(b) Typical tests conducted as part of a piping component evaluation Include, but are not limited to, the following:

(1) burst test

(2) SIF test (in accordance with Nonmandatory Appendix A).

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