Hello, everyone, i have no experience regarding Stamping and MDR for boilers, and it is seemingly more complicated than U stamped products. now that i encounter a case and get confused, please help me out.
for watertube boilers, the manufacturer responsible for the whole design manufactured the whole boiler parts, including drum, waterwall and economizer, and filed erection will be completed by another company, so which MDR should be used, P-4 is ok or not? partial Stamping for drum,economizer header,waterwall header will be applied, is it enough, what about the other tubes?
looking forward to your reply, thanks in advance.

As the company taking design responsibility and manufacturing all the components, they should use a P-3 Master Data Report, certifying the "Certificate of Shop Compliance"

The field assembler should certify the "Certificate of Field Assembly Compliance" on the same report.