ASME B31J pdf download Standard Test Method for Determining Stress Intensification Factors (i-Factors) for Metallic Piping Components ASME Code for Pressure Piping, B31 1 GENERAL 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 (i-factors or SIFs)...