The ASME B31 Code for Pressure Piping and theASME Boiler and Pressure Vessel Code, Section III,Nuclear Components, Subsections NC and ND pipingrules require the use of stress intensification factors(i-factors or SIFs) when checking the adequacy of componentsand joints (welded and nonwelded) in pipingsubject to loadings, including those cyclic loadings thatmay produce fatigue failures. As used herein, where theword “Code” is used without specific identification, itmeans the Code or Standard which incorporates or referencesthis Standard. The piping Codes provide stressintensification factors for the most common piping componentsand joints. This Standard presents an experimentalmethod to determine SIFs.
ASME B31J-2008 history
2023ASME B31J-2023 Stress Intensification Factors (i-Factors), Flexibility Factors (k-Factors), and Their Determination for Metallic Piping Components
2017ASME B31J-2017/errata-2017 Stress Intensification Factors (i-Factors), Flexibility Factors (k-Factors), and Their Determination for Metallic Piping Components
2017ASME B31J-2017 Stress Intensification Factors (i-Factors), Flexibility Factors (k-Factors), and Their Determination for Metallic Piping Components
2008ASME B31J-2008 Standard Test Method for Determining Stress Intensification Factors (i-Factors) for Metallic Piping Components