FAQ's

According to NACE MR0175, compressive stress means exclusion or waiver?

Question:

MR0175 part 2, Table 1: Does the intent to only load in compression, regardless of resultant stresses, fulfill the requirement for exclusion?

Answer:

The exclusion applies to components loaded in compression. It does not apply to equipment, assemblies, or aggregate parts loaded in compression. However, due to part geometry, constraint, bending, friction, or other factors, local stresses within a single component may have a significant tensile element. In such cases the likelihood of environmental cracking, and its consequences, shall be considered before invoking this exemption.

This question is in relation to NACE MR0175/ISO 15156-2

Reference: ISO 15156 Maintenance Panel Inquiry #2015-04

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