ASME B31J:2017 pdf free download

ASME B31J:2017 pdf free download.Stress Intensification Factors (i-Factors),Flexibility Factors(k-Factors), and Their Determination for Metallic Piping Components.
A-1.2 Test Specimen
The test specimen may be fabricated from a lower- strength carbon steel, such as ASTM A106 Grade B pipe or ASTM A234 Grade WPH tirtings. or equivalent plates and forgings, corresponding to the UTS < 80 ksi curve in ASME Hailer and Pressure Vessel Code, Section VIII. Division 2, Mandatory Appendix 3-F(a). For other materials, the material constant. C, shall be modified or derived as described in para. A-3. 1 if needed. The fabncation, welding, and examination of the tested component shall be the same as that expected to be used in service. Weld contours and procedures should also be representative of those intended to be used in practice. Weld locations where fatigue cracks are likely to originate should be Inspected fur undercut, welding starts and stops, or other anomalies that may affect fatigue life. Where welding starts and stops, undercuts, or other Irregularities are visible at potential crack sites, these Imperfections should be documented. All weld profiles, sizes, repairs, and/or photographs should be recorded and included in the Test Report. Where leakage is anticipated in or adlacent to a weld, the dimensions of the weld in that area should be recorded careftilly and variations In the weld contours noted in the Test Report. After the test is completed, the inside weld profile at the failure location should be described in the Test Report with photographs if possible and any anomalies noted. A-1.3 App(ied DispLacement CaLibration (a) The test specimen shall be mounted In the test assembly to develop a load-deflection diagram using the same procedure that will be used during the cyclic loading portion of the fatigue test. To develop the load-deflection diagram, displacements shall be applied in positive steps in the linear range to obtain a load-displacement diagram similar to that shown in Figure A-1.3- 1. At least five points shall be recorded in the linear region of the diagram. A point can be considered in the linear range if after the displacement Is applied the load does not change for a period of at least 3 minutes. (b) The initial loading sequence described in para. (a) shall be stopped when the load.dlsplacement plot Is no longer linear or when a sufficient linear portion of the diagram has been produced. To accommodate this requirement, the loading sequence may require one or two steps Into the nonlinear range. If the cycle range Is known to be well within the linear portion of the load-deflection plot range produced In para. (a). defiertions in the nonlinear portion of the load-deflection diagram are not required. Several cycles within the linear range may be applied to remove fabrication and installation residual effects before the load-displacement plot is produced.