Does our built-in propane tank need re-certification?

We own a 2007 Phoenix Cruiser 2350 and our last trip 3 different stations (two "Loves", one KOA) would not fill the built-in propane tank and stated "it needed to  be re-certified".  I checked online and sources seem to say that only portable DOT certified tanks and not built-in ASME tanks need to be recertified (every 10 years).  I'm assuming the PC's tank is an ASME tank.  Not sure how reliable those online sources are.  Does anyone here know the facts? TIA

https://rvsafety.com/rveducation/propane/propane-cylinder-recertification#:~:text=What%20about%20propane%20tanks%20in,corrosion%2Frust%20or%20other%20damage.


No, ASME tanks do not need recertification.

 Added in edit:

Canadian laws do seem. TO REQUIRE Inspection, but not recertification.

I assume part of the problem is how the tank looks.  If it's all rusted up, that flags the filling station.  If it looks great, they just fill it.  The same generalization can be applied to those propane tanks used for grills.  They need to be painted and looking maintained or the fillers won't touch them.

https://rvsafety.com/rveducation/propane/propane-cylinder-recertification#:~:text=What%20about%20propane%20tanks%20in,corrosion%2Frust%20or%20other%20damage.


No, ASME tanks do not need recertification.

 Added in edit:

Canadian laws do seem. TO REQUIRE Inspection, but not recertification.

Thanks.  That is what I had gathered.  Someone should educate the attendants at Loves and KOA....

I assume part of the problem is how the tank looks.  If it's all rusted up, that flags the filling station.  If it looks great, they just fill it.  The same generalization can be applied to those propane tanks used for grills.  They need to be painted and looking maintained or the fillers won't touch them.

Our tank actually looks pretty good for something with 17 years and 102,000 miles on it  ; just a few specks of chipped paint with rust in them on the side that gets hit with splash from the rear tires (because I'm too lazy to add the splash guard like you did  ).  Certainly nothing that would weaken or otherwise compromise the integrity of the tank. Portable tanks (DOT tanks), whether they look nice or not, ARE supposed to require re-certification every 12 years; wondering if anyone ever actually does that?

Yes, 12 years from the month-year stamped on the color on a DOT tank.  Every 5 years after that.