Which code must be followed when installing a high-pressure boiler for pressure piping?

When installing a high-pressure boiler for pressure piping, the relevant code to follow is B31.1, which specifically covers power piping systems. This includes guidelines for the design, fabrication, installation, and inspection of piping used in connection with power generation facilities, including boilers, which typically operate at high pressures.

B31.1 emphasizes safety and reliability for systems that generate or utilize steam and hot water, which is essential for high-pressure boilers. The code ensures that materials, construction practices, and testing methods are suitable to handle the stresses and loads those systems experience.

B31.3, on the other hand, deals with process piping, which is more applicable to chemical and manufacturing processes rather than specifically to high-pressure boilers. ANSI Z21.10 pertains to gas water heaters and does not cover high-pressure boiler piping installations. API 650 relates to welded tanks for oil storage, which is not relevant in the context of boiler pressure piping.

Therefore, the correct application of B31.1 ensures compliance with safety and operational standards in the installation of high-pressure boiler piping.