General

A MSD summarizes material requirements for process equipment and piping in the refining, process chemical, power, and other industries, and provides information needed for the development of piping and instrumentation diagrams (PIDs) and equipment mechanical data sheets.

Generally, the process and design data used to select the materials are also shown on the MSD. In its simplest form, a typical MSD consists of a marked-up or overlaid version of a simplified process flow diagram (PFD), showing relevant operating conditions, materials selection information, and application(s) of other material degradation preventative measures.

The scope of this standard is to define the minimum and optional information to be included on the MSD, provide recommended formats, and give guidance on key issues that arise when materials are selected. This standard does not define how to evaluate specific corrosion and materials degradation mechanisms or how to select materials for specific processes. Sample MSDs are included in Appendix A of this standard to show nonmandatory format and content examples.

It is intended that the primary use of the MSD is associated with new capital projects, retrofits, and expansions (especially in cases in which process conditions may have changed). Because the information stated on the MSD may change during project execution, the MSD may require revisions as issues surface during the project engineering and equipment fabrication stages of the project. Some projects use the MSD throughout the project, updating it as changes occur and making it "as-built" to be deliverable to the owner/operator, while other projects use the MSD only in the initial project stages. This standard covers primarily the initial MSD preparation.

The format and content of the initial MSD, its use, and its update philosophy should be agreed on by the owner/operator and the contractor/fabricator/licensor in the initial phases of the project.

The person specifying materials of construction must be familiar with corrosion and materials degradation mechanisms particular to the type of unit being designed.

Suitable tools (e.g., NACE standards, API(1) standards including API RP 571,1 public domain isocorrosion curves, company proprietary corrosion data, company standards, prior operating experience) shall be employed as necessary In selecting materials.

Customers who purchased NACE SP0407
also purchased

• API API 570 : Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems-Third Edition
• API 579-1 CD : Fitness-for-Service-Second Edition
• API 579-2 : Fitness-For-Service Example Problem Manual-First Edition

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