Fitness for Service - Locally Thin Area (Piping)

API 579-1 (2016) Part 5 Level 1 Assessment


Input Data



This calculation can be used to assess resistance to internal pressure for piping not subject to significant external loads.
This calculation takes a single minimum thickness reading along with flaw dimensions.
As it does not apply to components operating in the creep range, the B31 'W' factor does not apply.
Note: Equation 5.13 of API 579 (2016) is in error - we have inversed the weld efficiency fraction given in that formula.
Calculation should be carried out by a qualified mechanical engineer.