NACE AMPP Guide 21567-2024

The intent of this document is to describe the major aspects of the sampling process, from specific sample identification, determination of analytical requirements, through sample point design, to sample collection. Consideration of these aspects is necessary for the development of robust and safe sampling programs, protocols, and procedures to facilitate indirect corrosion monitoring.

This document is to assist end users in the development of sampling programs. The guidance is structured to provide an awareness of the major aspects of program design, which if not addressed, may have a significant negative impact on the overall performance of these programs. While this document has been primarily developed with a focus on sampling for indirect internal corrosion monitoring; the basic concepts have a broader applicability and may be of benefit to those developing sampling programs in other areas or for other requirements.

Similarly, whether an entire program is being developed for a new facility, yet to be designed, or whether a new sample is being considered within an existing facility, the concepts discussed may be successfully applied. The document is presented for the new facility case, as it will address the broader aspects that would not be required if a new point were to be installed within an existing facility with existing support programs. The document may also assist with assessments of existing sampling programs, by providing information that may be useful in the identification of contributing shortfall issues.

Several factors may influence the overall effectiveness of sampling programs. These factors include:
a) Sample Identification
b) Analytical Requirements
c) Sample Point Location Determination and Physical Placement
d) Sample Point Design
e) Safe Sample Collection
f) Training for Sampling and Laboratory Personnel
g) Process Integrity
h) Reporting
i) Inspection
j) Corrosion Monitoring Association
k) Documentation

These factors exhibit a very high degree of interdependence. Consequently, failure to identify or address seemingly insignificant issues within one component may result in major reductions in overall program efficiency or effectiveness.

Sampling programs are much broader in scope than simply obtaining a sample, performing a laboratory analysis, recording, and reporting results. To be effective, sampling programs will be structured to ensure that all facilities and procedures are in place to successfully enable sample collection and analysis, while at the same time maintaining process integrity.

This document will work with the project phases identified below and provide information regarding the actions that would be completed with respect to sampling within each phase.