LDS Won't + 10% Fill Plus Rated Tank?

[Dubious]

Long story short. I have 4 lp tanks. 2 LP72 and 2 LP95 are not plus rated (I didn't know this was a thing when I picked them up). 2 LP72's that were just hydroed came back plus rated. I pointed to the plus rating but was told that a tank can only be plus rated for the first 5 years from its birth? He also said the hydro tester they used should have not plus rated them? Is he completely mistaken or did I miss something about plus ratings on scubaboard?

 

[Wookie]

He’s right and wrong. If the cylinder isn’t rated for a + rating, one cannot be assigned. But if it was assigned a + rating at manufacture, it may be maintained.

So your plus rating is no good because the cylinders were never assigned one. What are the steel 95’s? I’ve never heard of one without a + rating?

Here is a good thread.... 10% overfill / Plus + rating on Steel LP tanks

 

[davehicks]

If you are stressing about overfilling your tanks it is time for a bigger tank. And maybe a pony bottle if you think you might be pushing it in to the red.

 

[Dubious]

So your plus rating is no good because the cylinders were never assigned one. What are the steel 95’s? I’ve never heard of one without a + rating?

The original date is plus rated on all four tanks or is there something I missing.

72 in question

Here is one of the 95's. Never plus rated after the original date

One of the 72's that were not plus rated.

If you are stressing about overfilling your tanks it is time for a bigger tank. And maybe a pony bottle if you think you might be pushing it in to the red.

Not the issue at all. I just was under the impression the plus +10% is how you actually got the rated cubic feet. So my lp95 will never be 95 due to no plus rating on last hydro. I actually like the 72's. They were great when we had a babysitter for a limited time so a quick 45 minute dive with the lp72 works out well. I have been looking for more locally.

 

[runsongas]

https://www.phmsa.dot.gov/sites/phm...aking/hazmat/interpretations/56816/170035.pdf

@Wookie I am not sure that the PHMSA requires an original + stamp as long as all sections of 173.302a are satisfied

 

[runsongas]

@Dubious you should also see if you can get the records for the testing on the lp95s to see if they actually failed the criteria for the plus per the REE or if the shop just didn't have the info

 

[Wookie]

https://www.phmsa.dot.gov/sites/phm...aking/hazmat/interpretations/56816/170035.pdf

@Wookie I am not sure that the PHMSA requires an original + stamp as long as all sections of 173.302a are satisfied

But if they weren’t plus rated at manufacture, how would you go back and get the REE?

 

[runsongas]

the REE can be calculated per CGA C-5 if you were suitably inclined like @Luis H

 

[Wookie]

the REE can be calculated per CGA C-5 if you were suitably inclined like @Luis H

Ah. I had no idea. Always good to learn a thing

I just bought hp cylinders instead. The weight to gas ratio on low pressure cylinders is not in my favor.

 

[runsongas]

if you don't cave fill then yes