Recreating a U1A Form
Recreating a U1A Form
(OP)
We have a client in the state of Colorado who is trying to put a pressure vessel back in service but there have been problems in locating the documentation for the vessel. The Colorado Boiler inspector requires any such pressure vessel must be board certified or in the event a board certification is not available then a waiver is needed. The waiver requires a Manufacturers Data Report / U1A form to satisfy this requirement. The challenge we are having is locating the U1A and since there is no board certification we are not able to contact them for copy.
My question, is there a means of recreating a U1A / Manufacturers Data Report on a pressure vessel? According to the name plate it has a U stamp. We have already conducted the API 510 which passes the physical/visual inspection requirements.
My question, is there a means of recreating a U1A / Manufacturers Data Report on a pressure vessel? According to the name plate it has a U stamp. We have already conducted the API 510 which passes the physical/visual inspection requirements.





RE: Recreating a U1A Form
Barely adequate, meaning A-36 or A-283 Gr C, istead of the more common SA-516 Gr 70. Rational is that you are forced to be conservative while reverse engineering, BUT based on the U-stamp the vessel was of acceptable material and thickness when it was new. Meaning that IF the vesssel is still at nominal thickness, no significant corrosion, it is still acceptable for continued use. Then you present your 510 results and the reverse-engineering calc's to the Colorado Board and hope that they will be accepted.
If your vessel has lost significant thickness, and the mfr will not give you a copy of the U-1, you have a planter box, not a vessel. Because you had to make the conservative assumption that the vessel was barely adequate when U-stamped, and it has lost thickness, it is now below the [assumed] required thickness.
And don't ask how I know all this.
RE: Recreating a U1A Form
Anybody else willing to share their undocumented PV stores ?
MJCronin
Sr. Process Engineer
Venture Engineering & Construction
www.VentureEngr.com
RE: Recreating a U1A Form
RE: Recreating a U1A Form