ASME PTB-3:2010 pdf free download.Section VIIl – Division2 Example Problem Manual.
1) Primary Stress — The flaw is located away from all structural discontinulties, Therefore, the primary stress at the weld joint perpendicular to the crack face is a membrane hoop stress. From Annex C, Table C.1, the flaw geometry, component geometry, and loading condition correspond to KCSCLE2 and RCSCLE2, i.e. Cylinder – Surface Crack – Longitudinal Direction – Semi-Elliptical Shape – Internal Pressure. The stress intensity factor solution for KCSCLE2 is provided in Annex C, paragraph C.5.1O. The reference stress solution for RCSCLE2 is provided in Annex D, paragraph D.5.1O. The membrane and bending components of the primary stress for the calculation of the reference stress are given by Equations (D.47) and (D.48).
2) Secondary Stress — Thermal gradients do not exist in the vessel at the location of the flaw. and the flaw is located away from all major structural discontinuities. Therefore, there are no secondary stresses.
3) Residual Stress — The flaw is located at a weld in a vessel that was subject to PWHT at the time of fabrication. From Annex E, paragraph E.3.2, to estimate the magnitude of the residual stress distribution at a weld joint, an estimate of the actual yield strength of the material must be made. The elevation of the effective yield strength above the specified minimum yield strength accounts for the typical elevation of actual properties above minimum requirements and is calculated per Equation (E.2).
ASME PTB-3:2010 pdf free download
