ASME B31J (2008)

Standard Test Method for Determining Stress Intensification Factors (i-Factors) for Metallic Piping Components

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Annotation and contents

This Standard sets forth an engineering procedure deemed appropriate for the determination of the fatigue capacity of a piping component or joint in most services, relative to a standard butt-welded joint.  The B31 piping Codes provide stress intensification factors for the most common piping components and joints.  This Standard presents an experimental method to determine stress intensification factors.