Home » Public Forums » GMCnet » Anyone know a source for the large LP Gas tank (I cannot find a replacement LP gas tank that's as big as the one I've got now)
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| Re: [GMCnet] Anyone know a source for the large LP Gas tank [message #317483 is a reply to message #317482] |
Fri, 12 May 2017 20:13   |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Matt,
I'll second your conclusion re David's LPG tank.
I've been "playing with" pressure vessels of all types from liquid oxygen
convertors in the USAF to the ~ 1/8" walled inconel steel Oxygen Purge
System filled with 6000 psi O2 that sat on top of the Project Apollo
Portable Life Support System.
Regards,
Rob M.
The Pedantic Mechanic
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808
-----Original Message-----
From: Matt Colie
Sent: Saturday, May 13, 2017 10:56 AM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Anyone know a source for the large LP Gas tank
OK Everybody,
Relax....
What David found was a discussion of the DESIGN life expectancy of pressure
vessels subject to heat and corrosion. This would be applicable to power
plants and things in a marine application.
As far as I know, nobody's propane tank is in that position. David's tank
was probably defective at manufacture, it just took this look to show up.
When I was having trouble with my propane tank (a 73) a few years back, I
took it to a tank man I have known for years to have him replace the service
valve. things in the shop got confused and the hydo-tested it. It came
back fine (actually a ++ rating), but with the bad valve reinstalled.....
We laughed about it and I changed out the valve myself.
Matt
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: Anyone know a source for the large LP Gas tank [message #317498 is a reply to message #312765] |
Sat, 13 May 2017 13:31 |
DavidJForjan
Messages: 65
Registered: August 2016
Location: Tularosa New Mexico
Karma: 2
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Hi you guys. Thanks for all the comments. First let me say that I'll have photos and a price breakdown for my new 19.3 gallon LP gas tank posted tonight at the latest.
Second, I did not say that the welds were bad from manufacture or defective at manufacture. Actually I would advise against assuming the problem was a defect. Especially with the need to err on the side of caution if only cuz we're talking about highly combustible stuff, not to mention 40 years is a lot of contracting/expanding and bouncing. Moreover, putting another 40 year-old LP gas 60lb. bomb-equivalent to replace mine seemed illogical to me. Additionally, I want the motorhome to be the best condition I can, not just for my time using it, but also for whoever else drives this in the next 40 years.
Third, it would behoove someone smarter than me to conclude what really is the expected life expectancy of these tanks, cuz 40 years is a long time. That's a lot of contracting and expanding cuz there's lots of temperature changes in that time, and harsh climates - and alot alot alot of bouncing. Lots of tanks don't bounce in their lifetime, meaning our tanks have that ADDED stress.. We should also keep in mind that all these pressure vessels are built only for their purpose - meaning a 60lb. tank is not built as tough as a boiler. Just built to hold 60lb. of LP gas for however many years.
But for me, I didn't need to fully understand the issue of life expectancy. I had to replace mine now and so that forced me to decide on used vs. new right away. And like I said, given that choice, it's obvious to me to buy new. But - my desire was for the original 19.3 gallon size tank, not the 11.2 gallon tank that AppliedGMC sells. That's been my quest. And toward that end, I look forward to sharing the price breakdown and installation photos tonight.
david
David J. Forjan, 1977 403 26' Palm Beach, glad to have the 3.70 Final Drive and pork chop for level front end, Tularosa New Mexico
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| Re: [GMCnet] Anyone know a source for the large LP Gas tank [message #317499 is a reply to message #317498] |
Sat, 13 May 2017 13:45 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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It is not a bomb, or anywhere near the equal of one. Millions upon millions
of propane tanks are in reliable service daily with no problems. The
regulators and hoses and brass and copper fittings, along with poor
installation procedures are responsible for most of the issues we see or
hear of when it comes to compressed flammable gasses. Regular maintenance
is the key, along with a good nose.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On May 13, 2017 11:32 AM, "David J. Forjan" wrote:
> Hi you guys. Thanks for all the comments. First let me say that I'll
> have photos and a price breakdown for my new 19.3 gallon LP gas tank posted
> tonight at the latest.
>
> Second, I did not say that the welds were bad from manufacture or
> defective at manufacture. Actually I would advise against assuming the
> problem was
> a defect. Especially with the need to err on the side of caution if only
> cuz we're talking about highly combustible stuff, not to mention 40 years is
> a lot of contracting/expanding and bouncing. Moreover, putting another 40
> year-old LP gas 60lb. bomb-equivalent to replace mine seemed illogical to
> me. Additionally, I want the motorhome to be the best condition I can,
> not just for my time using it, but also for whoever else drives this in the
> next 40 years.
>
> Third, it would behoove someone smarter than me to conclude what really is
> the expected life expectancy of these tanks, cuz 40 years is a long time.
> That's a lot of contracting and expanding cuz there's lots of temperature
> changes in that time, and harsh climates - and alot alot alot of bouncing.
> Lots of tanks don't bounce in their lifetime, meaning our tanks have that
> ADDED stress.. We should also keep in mind that all these pressure vessels
> are built only for their purpose - meaning a 60lb. tank is not built as
> tough as a boiler. Just built to hold 60lb. of LP gas for however many
> years.
>
> But for me, I didn't need to fully understand the issue of life
> expectancy. I had to replace mine now and so that forced me to decide on
> used vs. new
> right away. And like I said, given that choice, it's obvious to me to buy
> new. But - my desire was for the original 19.3 gallon size tank, not the
> 11.2 gallon tank that AppliedGMC sells. That's been my quest. And toward
> that end, I look forward to sharing the price breakdown and installation
> photos tonight.
> david
> --
> David J. Forjan, 1977 403 26' Palm Beach, glad to have the 3.70 Final
> Drive and pork chop for level front end, Tularosa New Mexico
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: Anyone know a source for the large LP Gas tank [message #317501 is a reply to message #317498] |
Sat, 13 May 2017 16:10 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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DavidJForjan wrote on Sat, 13 May 2017 14:31<snip>
Second, I did not say that the welds were bad from manufacture or defective at manufacture. Actually I would advise against assuming the problem was a defect. Especially with the need to err on the side of caution if only cuz we're talking about highly combustible stuff, not to mention 40 years is a lot of contracting/expanding and bouncing. Moreover, putting another 40 year-old LP gas 60lb. bomb-equivalent to replace mine seemed illogical to me. Additionally, I want the motorhome to be the best condition I can, not just for my time using it, but also for whoever else drives this in the next 40 years.
<snip>
david
David,
I know you did not say that the weld was bad at manufacture. I said that. I wrote that with good reason.
If you are correct and the tanks has failed (cracked) at the weld or where it should have been welded, it was a defective weld. That is all there is to that.
A properly done weld should be as strong and tough (two different things) as the parent metal. This is both an ASME and ASTM standards. I have done tests to the welds in super-critical (steam reference) power plant welds to prove this. This is not nearly a unique situation.
Welded assemblies can fail. 45 years ago I supervised the assembly of the DECO Monroe power plant. It was designed for a 20 year life. It is still on line, but five years ago the reheat piping was replaced with drawn tubing. It was originally seamed. While the field welds were no issue, the seams were machine welded and an ultrasonic inspection showed cracking starting in the root of the welded seams on some sections. This was no surprise to me because the X-rays of the welds that I certified frequently showed poor root fusion. They were defective 45 years ago and only had to be heated to 1005°F about 200 times with 500 psi steam to start cracking.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Anyone know a source for the large LP Gas tank [message #317505 is a reply to message #317498] |
Sat, 13 May 2017 17:41 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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G'day,
Some additional information:
https://answers.yahoo.com/question/index?qid=20090726234748AAjVAlH
http://www.inspectapedia.com/plumbing/Propane_Tank_Gas_Pressures.php
https://www.physicsforums.com/threads/what-is-the-pressure-inside-domestic-l
pg-cylinders.689568/
Regards,
Rob M.
The Pedantic Mechanic
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of David J.
Forjan
Sent: Sunday, May 14, 2017 4:32 AM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Anyone know a source for the large LP Gas tank
Hi you guys. Thanks for all the comments. First let me say that I'll have
photos and a price breakdown for my new 19.3 gallon LP gas tank posted
tonight at the latest.
Second, I did not say that the welds were bad from manufacture or defective
at manufacture. Actually I would advise against assuming the problem was
a defect. Especially with the need to err on the side of caution if only
cuz we're talking about highly combustible stuff, not to mention 40 years is
a lot of contracting/expanding and bouncing. Moreover, putting another 40
year-old LP gas 60lb. bomb-equivalent to replace mine seemed illogical to
me. Additionally, I want the motorhome to be the best condition I can, not
just for my time using it, but also for whoever else drives this in the
next 40 years.
Third, it would behoove someone smarter than me to conclude what really is
the expected life expectancy of these tanks, cuz 40 years is a long time.
That's a lot of contracting and expanding cuz there's lots of temperature
changes in that time, and harsh climates - and alot alot alot of bouncing.
Lots of tanks don't bounce in their lifetime, meaning our tanks have that
ADDED stress.. We should also keep in mind that all these pressure vessels
are built only for their purpose - meaning a 60lb. tank is not built as
tough as a boiler. Just built to hold 60lb. of LP gas for however many
years.
But for me, I didn't need to fully understand the issue of life expectancy.
I had to replace mine now and so that forced me to decide on used vs. new
right away. And like I said, given that choice, it's obvious to me to buy
new. But - my desire was for the original 19.3 gallon size tank, not the
11.2 gallon tank that AppliedGMC sells. That's been my quest. And toward
that end, I look forward to sharing the price breakdown and installation
photos tonight.
david
--
David J. Forjan, 1977 403 26' Palm Beach, glad to have the 3.70 Final Drive
and pork chop for level front end, Tularosa New Mexico
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Unsubscribe or Change List Options:
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GMCnet mailing list
Unsubscribe or Change List Options:
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: Anyone know a source for the large LP Gas tank [message #317515 is a reply to message #312765] |
Sat, 13 May 2017 22:19 |
DavidJForjan
Messages: 65
Registered: August 2016
Location: Tularosa New Mexico
Karma: 2
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Member |
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Thank you. I saw photos embedded in a post and I thought I could just upload directly. This may be awhile though, FWIW, I have an account at gmcmphotos.com, but I forgot my login info, like I always do, my computer also forgot that info, and to reset, the only option is to send to what was my email address I used at that time, but it's no longer my email address now, and so gmcmphotos.com can only send me that info to my old address not in use anymore. Bummer
david
David J. Forjan, 1977 403 26' Palm Beach, glad to have the 3.70 Final Drive and pork chop for level front end, Tularosa New Mexico
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| Re: [GMCnet] Anyone know a source for the large LP Gas tank [message #317517 is a reply to message #317515] |
Sat, 13 May 2017 23:30 |
Richard Denney
Messages: 920
Registered: April 2010
Karma: 9
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Senior Member |
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I feel your pain. But an email to Billy Massey will sort it quickly.
Rick "who has had to do this in the past" Denney
On Sat, May 13, 2017 at 11:20 PM David J. Forjan
wrote:
> Thank you. I saw photos embedded in a post and I thought I could just
> upload directly. This may be awhile though, FWIW, I have an account at
> gmcmphotos.com, but I forgot my login info, like I always do, my computer
> also forgot that info, and to reset, the only option is to send to what was
> my email address I used at that time, but it's no longer my email address
> now, and so gmcmphotos.com can only send me that info to my old address
> not
> in use anymore. Bummer
> david
> --
> David J. Forjan, 1977 403 26' Palm Beach, glad to have the 3.70 Final
> Drive and pork chop for level front end, Tularosa New Mexico
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
'73 230 "Jaws"
Northern Virginia
rick at rickdenney dot com
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| Re: Anyone know a source for the large LP Gas tank [message #317521 is a reply to message #312765] |
Sun, 14 May 2017 08:00 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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David -
Simply register a new account. Then you can post your pictures.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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