Horizontal 20 lb. propane tanks.

D.E.Bishop wrote:

SaltiDawg wrote:


I care - that's why I enjoy reading at this mobile home forum. :R

To my brother of the Phin(short for dolphin which is the emblem we that are qualified Submariners wear), I did not mean to be flippant but the discussion degenerated from answering the OP's question to a discussion of semantics. ...

I wasn't chiding you.

Just a (likely bad) attempt at humor

It is wrong to refer to an RV as a "mobile home," right? :C

"Prepare to Snorkel."

SaltiDawg wrote:

D.E.Bishop wrote:
Okay, now we know the difference between tanks and cylinders, as stated and promptly forgotten, as in who cares...

I care - that's why I enjoy reading at this mobile home forum. :R

To my brother of the Phin(short for dolphin which is the emblem we that are qualified Submariners wear), I did not mean to be flippant but the discussion degenerated from answering the OP's question to a discussion of semantics. Common usage of cylinder and tank for the storage of propane is never going to change so why get too involved in trying to explain it over and over. I know it will come up again next week or next month and the same voices will try and convince everyone to use the two words correctly. But it ain't going to happen.

Dutch_12078 wrote:

mike-s wrote:

Dutch_12078 wrote:
Not meaning to nit-pick, but ASME tanks had an overfill prevention device (OPD) years (1984) before they were mandated on DOT cylinders (2001). They use a bit different design due to the differences in filling, but the purpose is exactly the same.

They not required to have them. Mine only has a "spit valve."

The ASME specifications have mandated an OPD on tank fill ports since 1984. The "spit valve" is the Fixed Maximum Liquid Level Gauge that serves as a visible indicator of a full (80%) tank. Most DOT cylinders also have a "spit valve" that serves the same purpose.

My tank was manufactured earlier than that, and there is no requirement to add an OPD, as there is with cylinders.

mike-s wrote:

Dutch_12078 wrote:
Not meaning to nit-pick, but ASME tanks had an overfill prevention device (OPD) years (1984) before they were mandated on DOT cylinders (2001). They use a bit different design due to the differences in filling, but the purpose is exactly the same.

They not required to have them. Mine only has a "spit valve."

The ASME specifications have mandated an OPD on tank fill ports since 1984. The "spit valve" is the Fixed Maximum Liquid Level Gauge that serves as a visible indicator of a full (80%) tank. Most DOT cylinders also have a "spit valve" that serves the same purpose.

I don't know why they ever put'm on. 1/2 of them don't work any way,.....liquid come out the bleeder before ever shutting off. I wish mine didn't work, tired of getting only 2/3 tankful !.

Dutch_12078 wrote:
Not meaning to nit-pick, but ASME tanks had an overfill prevention device (OPD) years (1984) before they were mandated on DOT cylinders (2001). They use a bit different design due to the differences in filling, but the purpose is exactly the same.

They not required to have them. Mine only has a "spit valve."

mike-s wrote:

ASME tanks are made of heavier gauge material, are intended to be mounted permanently, don't need regular recertification, have fixed supply connections with hard line, are refilled while on the vehicle through a special refill port, and aren't required to have an Overfill Prevention Device (OPD).

Not meaning to nit-pick, but ASME tanks had an overfill prevention device (OPD) years (1984) before they were mandated on DOT cylinders (2001). They use a bit different design due to the differences in filling, but the purpose is exactly the same.

I thought the thread was about vertical vs horizontal,....why are we haggling over tanks vs cyls ? And right on, who cares.

Its not hard to change a vertical tank to a horizontal,....if you know what you're doin. But you must be able to R&R the main valve so you can change the add a dip tube.
I modified a vertical 30# tank so the dip tube goes to the bottom for filling 1# bottles.

20lb/OPD CLEAR CONTEXT

REQUALIFICATION still 12 yrs
https://www.npga.org/i4a/pages/index.cfm?pageid=1911

Feel free to call a cylinder a tank when the context makes it clear what you're referring to. But, the OP didn't provide any context, and there are a lot of differences between them. $157 is a great price for a tank, it's a decent price for a cylinder.

These are generalizations, there may be occasional exceptions.

ASME tanks are made of heavier gauge material, are intended to be mounted permanently, don't need regular recertification, have fixed supply connections with hard line, are refilled while on the vehicle through a special refill port, and aren't required to have an Overfill Prevention Device (OPD).

DOT cylinders are portable, need recertification every 10 years, some places may require that they be removed from the vehicle before filling, have ACME valve ports with OPD where flexible hose connections are made by hand, and are refilled through the same port.