Free magnetic particle testing calculators: coil shot amperage from L/D ratio, central conductor and head shot current by diameter, prod spacing amperage, and fill factor, based on ASTM E1444 and ASME Section V Article 7 formulas.
Calculates ampere-turns for longitudinal magnetization in a coil from part length, diameter, and coil turns. Uses NI = 45,000 / (L/D) for L/D of 4 or greater and NI = 35,000 / (L/D + 2) for L/D between 2 and 4, then divides by turns to give amperage. Parts with L/D under 2 need pole pieces or extensions to be magnetized effectively in a coil.
It's crucial to verify the accuracy and applicability of these formulas for your specific MPI setup and materials. Consult with experienced MPI professionals or refer to relevant industry standards.
Coil Radius Measurement: Ensure accurate measurement of the coil radius.
Units: Maintain consistent units (inches) for all length and diameter values in the calculations.
If your part is hollow use the calculator below to calculate the effective diamter to use in place of the diameter in this calculator.
Use this calculator to calculate the diagonal of a rectangular object.
This could be used for calculating the diagonal of a gamma source as well.
These calculators or for education purposes only please verify results ans consult with NDT professionals for critical applications.
Always refer to the relevant MPI standards (e.g., ASTM E1444, ASTM E709) for specific requirements and guidelines.