Section I Form P-4A and P-4B
Section I Form P-4A and P-4B
(OP)
There are 4 new spools to be fabricated and installed as boiler external piping. Shop fabrication is welded, field installation is mechanical assembly (flanged and bolted) only. I understand that Form P-4A is needed for fabrication, but is From P-4B needed for field installation of these spools? If so, is a field hydro test required if a shop hydro was done for fabrication?





RE: Section I Form P-4A and P-4B
Anyone can assemble it without a stamp, as long as the welded portions of the spool pieces have had a shop hydro your golden. You should only need a P-4A and shop hydro.
RE: Section I Form P-4A and P-4B
We looked at PG-109.4 but were a bit unsure on how to read the part "....which contains no pressure boundary welds....". Does this refer only to field installation or welds or those that were part of fabrication?
RE: Section I Form P-4A and P-4B
RE: Section I Form P-4A and P-4B
RE: Section I Form P-4A and P-4B
Sect I indicates that 2" piping (mechanically assembled) can be put together by a on-stamp holder. Is yours 2"NPS or less?