Pressure vessel Codes are broken down into two general categories, new and post construction. Although the two activities are related, this separation reflects the fact that building a safe pressure vessel is not the same process as safely operating a pressure vessel once installed.
Codes of construction, like the ASME BPVC, deal with the Engineering design, fabrication, documentation and certification requirements of new pressure vessel construction. The API 510 is a post construction Code that applies to pressure vessels after they have been placed into service. It addresses in-service activities such as inspection, remaining life determination and repair. API 510 also provides a method to document Coded pressure vessels that have lost their nameplate or stamping.