FAQ's
Acceptability of HV 500g Testing for NACE WPS Qualification
Can HV 500g (microhardness) Testing Be Used for NACE Applications for Wps Qualification?
Although Paragraph 7.3.3.2 of NACE MR0175/ISO 15156 Part 2 notes that hardness testing should typically be carried out using HV 10kg or HV 5kg (which is our usual practice), the testing was done with HV 500g on CSA Z245.1 Grade 359 pipe material.
Answer:
Yes, it’s acceptable, depending on the equipment user’s agreement. Please refer to NACE MR0175/ISO 15156-2, Para. 7.3.3.2.