What are the three key specifications in ASME BPVC Section II, Part A?

The three key specifications in ASME BPVC Section II, Part A are indeed SA-20, SA-370, and SA-6. This section of the ASME Boiler and Pressure Vessel Code provides material specifications essential for ensuring that the materials used in the construction of pressure vessels and boilers meet the necessary safety and performance standards.

SA-20 outlines the general requirements for carbon and low-alloy steel plates for pressure vessels; this specification is fundamental because it helps ensure that the structural integrity of the vessels is maintained under operating conditions. SA-370 provides the mechanical property requirements such as tensile strength and yield strength, which are crucial for assessing material performance during service. Lastly, SA-6 pertains to the specification for plates and bars for pressure vessels, which helps specify the appropriate manufacturing processes and quality control measures.

Together, these specifications create a framework for material selection that is critical in the design and manufacturing of safe and reliable pressure equipment. Their significance within the context of ASME BPVC Section II, Part A reinforces the importance of adhering to established standards to ensure safety in the industry.