What standard must steel and wrought-iron pipe comply with?

The correct standard for steel and wrought-iron pipe is ASTM A53. This standard specifies the requirements for several types of welded and seamless steel pipes, which are commonly used in various applications, including gas and propane systems. Understanding this standard is crucial because it outlines factors such as chemical composition, mechanical properties, and dimensional tolerances, ensuring the pipes used in these systems are safe, durable, and capable of withstanding the operational stresses they may encounter.

The standard weight schedule, such as schedule 40, refers more to the thickness of the pipe wall and does not specifically define the materials or properties of the pipe itself. While it is important for determining the strength and pressure rating of the pipe, it is not a comprehensive standard that addresses all requirements for steel and wrought-iron pipes.

ASTM D2513 pertains to the specifications for polyethylene (PE) gas piping systems, which is unrelated to steel and wrought-iron pipes.

Type K and Type L in ASTM B88 refer to copper tubing used in specific applications, which is not applicable to steel or wrought-iron pipe standards. These distinctions highlight the importance of selecting the appropriate standards based on the type of materials being used in piping systems.