Section I Form P-4A and P-4B

[Jordan123]

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?

 

[aslav]

PG-109.4
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.

 

[Jordan123]

Thanks for the response aslav. This was our conclusion as well.
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?

 

[aslav]

I had this same issue. After consulting my AI we concluded that since the welds had a shop hydro they are covered and the spool piece must be stamped. The attachment of the flanged connection can be made without further documentation. I would suggest talking this over with your AI first and possibly with the jurisdiction just to be safe but thats how we read it.

 

[Bocephus50]

Check with Jurisdiction...if these are new boiler installations, jurisdiction might want Form P-4B completed. If these spools are being installed on existing boilers, jurisdiction (like TN) might want the installation documented on Form R-1 and noted as Mechanical Repair on Line 10 remarks (as this piping is between the boiler and valve). Definitely need Form P-4A for shop construction.

 

[GenB]

BEP is B31.1 Jurisdiction and needs Certification once is assembled. Mot States/Jurisdictions will allow a non stamp holder mechanically install flanged spools even if certification is required.
Sect I indicates that 2" piping (mechanically assembled) can be put together by a on-stamp holder. Is yours 2"NPS or less?