My understanding here is that the PED applies to all pressure vessels with the only loop hole being prototypes. As long as the component is suitable identified see FRA build rule 8.15 and is not available for sale then this may meet the PED requirements. I do stand to be corrected because the PED is not easy reading.

As for pressure testing, I would expect that to be conducted by an establishment who have the necessary credentials to undertake the pressure testing to a recognised procedure / standard.

Daniel, I do not have my copy of the PED here but respect your classification as you are in that business, where did you obtain that classification list from?

As for Mario making prototypes, I would assume that as soon as 2 or more identical components are made for different customers than I would guess it would not be unreasonable to consider these are being manufactured for retail purposes.

Paul