Indicates the anticipated number of applications of this load on the system for load cases using the Expansion (EXP) or Fatigue (FAT) stress types. The software uses this value to determine the allowable stress from the fatigue curve for the material or the cyclic reduction factor for an Expansion case. For static cases, the software calculates stresses at full range. For dynamic cases, the software calculates stresses at half range, which is the amplitude of the full stress range.
For load cases with an Expansion (EXP) stress type, you can enter a value of 1 in the Load Cycles field (for B31.1 jobs) to indicate that the stress range is caused by noncyclic movements. In this situation, the software replaces the allowable stress range value (Sa) with a special noncyclic allowable calculation, as per the B31.1 code standard. The software continues to calculate the displacement stress range (Se) as defined by the applicable piping code.