What does SA-369 FPA refer to in the context of pipe material specifications?

SA-369 is a specification for forged or rolled alloy steel pipe specifically designed for high-temperature or high-pressure service. This standard identifies a range of pipe materials made principally from carbon steel, which is characterized by its balance of strength, ductility, and weldability. Carbon steel is widely used in various applications, particularly for its cost-effectiveness and mechanical properties, making it a common choice for piping systems in power engineering.

In contrast, the other materials mentioned—stainless steel, nickel alloys, and specific alloy steels—are governed by different specifications. While they are also used in high-performance applications, they serve distinct purposes based on factors like corrosion resistance, temperature tolerances, and fluid types. The focus of SA-369 on carbon steel reflects its suitability for many applications in the power industry, particularly where strength and pressure handling are crucial.