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I have a 50 lb can R12 and..... Pages: 12

pippo on Sun September 27, 2009 1:12 PM User is offline

I dont know the tare weight of the can itself. Anyone know what these cylinders weighed from DuPont? There is no obvious "tare" stamp like other cylinders have, but I have the following off the can:

DOT 39 NRC 260/325 M1079

WT2030A (or WJ2030A..cant tel if it was meant to be a T or J). Figured some old timer here would know somethjing on this, or how to go about finding out. I can always try to call Dupont, of course.

Thanks, Men.

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Cussboy on Sun September 27, 2009 1:54 PM User is offline

Weren't these 30 lb. net wt. R-12? Most seemed to have TW stamped on them.

pippo on Sun September 27, 2009 1:57 PM User is offline

Quote
Originally posted by: Cussboy
Weren't these 30 lb. net wt. R-12? Most seemed to have TW stamped on them.

Maybe, but this one says clearly 50lb. No mistaking it. again, no TW on it.

Thanks for reply, though.

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TRB on Sun September 27, 2009 2:21 PM User is offlineView users profile

Should be able to find the answer in this link.

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pippo on Sun September 27, 2009 4:04 PM User is offline

Thanks, TRB, but no luck there so far.

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TRB on Sun September 27, 2009 4:08 PM User is offlineView users profile

Really I thought I read someone list them at 6 or 7 pounds.

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mk378 on Sun September 27, 2009 11:08 PM User is offline

Put the cylinder in a cold place until the contents are completely cold. Then take it out into normal warm humid air. It should start to condense "sweat" on the outside. The sweating will clear off of the top part sooner than the bottom where the liquid is. At some point in the warming process you should see a clear line showing the level of liquid inside. If it doesn't sweat you should still be able to feel an abrupt temperature change at the level corresponding to the liquid line.

pippo on Tue September 29, 2009 3:43 PM User is offline

Quote
Originally posted by: TRB
Really I thought I read someone list them at 6 or 7 pounds.

I couldnt find that, but either way, called DuPont, and even they couldnt be 100% sure, but placed the weight at about 9lbs, based on the #'s I read to them. Thats it. He said since theyre disposable cylinders, no TW was put on them. So, I will go with 9lbs.

Thanks guys!

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pippo on Tue September 29, 2009 3:48 PM User is offline

Quote
Originally posted by: mk378
Put the cylinder in a cold place until the contents are completely cold. Then take it out into normal warm humid air. It should start to condense "sweat" on the outside. The sweating will clear off of the top part sooner than the bottom where the liquid is. At some point in the warming process you should see a clear line showing the level of liquid inside. If it doesn't sweat you should still be able to feel an abrupt temperature change at the level corresponding to the liquid line.

Still dont see how this would give you the weight unless you go further:

You would need density at that temp, THEN you would have to calculate the volume of the container which you could do by submerging it in a big tub of water, then calculate the volume of water displaced, then convert to metric and get weight. Doable, yes, interesting, yes.

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Edited: Tue September 29, 2009 at 3:48 PM by pippo

TRB on Tue September 29, 2009 3:52 PM User is offlineView users profile

Second post in the second link within the link I posted on tare weights. But I don't think all cylinders are going to weight the same.

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pippo on Tue September 29, 2009 8:22 PM User is offline

Quote
Originally posted by: TRB
Second post in the second link within the link I posted on tare weights. But I don't think all cylinders are going to weight the same.

Thanks, TRB, but I saw that, and noted that he was referencing a 30lb tank, not my 50 pounder.

Anyway, now, I figure I have about 5 lbs......pretty good for my purposes!!!!!!!!!!!!!!

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TRB on Tue September 29, 2009 11:46 PM User is offlineView users profile

My mistake as I read your first post not the header of this thread.

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HECAT on Wed September 30, 2009 5:18 AM User is offline

The DOT 39 50 lb disposable cylinder we use for Genesolv SF has a TW of 11 lbs.

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NickD on Wed September 30, 2009 5:28 AM User is offline

Okay, admit to living in the backwoods, but never ran across a 50 pound cylinder, they do call them cylinders, don't they? Largest I have ever seen in the last, hmmm, let's see, 46 years is a 30# cylinder, seems terrible to have to toss those things away when empty. Cost a lot more than the damn refrigerant on the inside, least manufacturing wise, the rest of it is a government ripoff. Just heard on the news yesterday that 80% of the government supported day care centers were ripping off the government in Milwaukee County, nice to know where my money is going. Love to see our governor and legislators all in jail.

HECAT on Wed September 30, 2009 6:14 AM User is offline

Nick, you can go here and look at non refillable cyclinders If you click on the PDF specs the blue is 15 lb, the white and red are 30 lb and the green one is a 50 lb. The size is actually the water capacity. No TW specs provided.

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NickD on Wed September 30, 2009 7:37 AM User is offline

Yeah, I see they manufacturer four different non-recoverable cylinders and spec capacity by water weight in the 15-50 # approximate range with no cylinder net weight given. Suppose a guy filling a skyscraper AC could use a 50# tank. Just never seen one. Would have to find the density of the liquid refrigerant to learn the true capacity of these cylinders. Didn't mean to pick on my state, but they do charge a surtax on all refrigerants, claim they are protecting the environment. But we also have Michigan, Minnesota, and Illinois nearby and so far, no border inspections. Maybe next year.

pippo on Wed September 30, 2009 3:28 PM User is offline

Quote
Originally posted by: HECAT
The DOT 39 50 lb disposable cylinder we use for Genesolv SF has a TW of 11 lbs.

Gees,hecat, I just lost 2 lb of R12!....LOL!! If youre right, then 11lbs is 2lb more than the DuPont tech rep told me. Man, even those guys cant get it right. And yes, he also confirmed it was a Genesolv.

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pippo on Wed September 30, 2009 3:30 PM User is offline

Hecat, how did you verify that my bottle is 11lbs....curious?

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HECAT on Thu October 01, 2009 5:15 AM User is offline

I purchase 50 lb containers of Genesolv SF from Honeywell. They contain 50 lbs of product and shipping weight is 61 lbs., thus the simple answer of 11 lb TW. Genesolv is Honeywell's trade name for precision cleaners and Genetron is their trade name for refrigerants. I am going by our warehouse this morning and will see what numbers I can pull off a full tank, and I will see if we have an empty one in our shop that I can weight; will post back later.

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HECAT on Thu October 01, 2009 12:37 PM User is offline

The tanks I have are marked DOT-39 NRC 260/325 M1144. There is no manufacturer or TW markings that I can find. An empty container here at the shop weighs 10 lbs. The additional 1 lb covers the box.

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FLUSHING TECHNICAL PAPER vs2.pdf 

pippo on Thu October 01, 2009 7:55 PM User is offline

Quote
Originally posted by: HECAT
The tanks I have are marked DOT-39 NRC 260/325 M1144. There is no manufacturer or TW markings that I can find. An empty container here at the shop weighs 10 lbs. The additional 1 lb covers the box.

Thanks very much for going the extra mile, hecat. Thats very close to DuPonts estimate as well (he said 9#). So, Ill figure 9.5lb, and now I have 4-5#......still not bad for 2 cars worth.

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