What does ASME Boiler and Pressure Vessel Code Section I specifically apply to?

The ASME Boiler and Pressure Vessel Code (BPVC) Section I specifically addresses the requirements for the design, materials, construction, and inspection of power boilers and high-pressure, high-temperature water boilers. This includes both the boiler proper and any associated external piping that is connected to the boiler.

The inclusion of external piping is crucial because it outlines the safety and operational standards necessary to ensure that the entire system functions safely and effectively. This aspect of the code is essential for preventing failures that could occur not just at the boiler itself, but in the piping that conveys steam or hot water from the boiler to other parts of a facility or system. By ensuring that both the boiler and its external piping are covered under the same set of standards, the code promotes a comprehensive approach to boiler safety and efficiency.

The other choices do not capture the full scope of what is covered by Section I. It does not limit itself to just the boiler, nor does it focus solely on heating systems or residential water heaters, which fall under different sections of the ASME BPVC. Thus, the correct answer encompasses the broader requirements concerning both boiler components and their external connections.