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| Re: [GMCnet] propane tubing question [message #268554 is a reply to message #268549] |
Wed, 31 December 2014 01:19   |
Ray R.
Messages: 26
Registered: December 2014
Location: Ladysmith, WI
Karma: 0
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I used to do LP home installations in a former life about 30 years ago. We used Type K for underground and K and L for interior. You do not solder LP lines. I think the tubing shown is intended for soldering. I think that regulations change from state to state. Things may have changed since I was involved.
Please note: For LP gas, always use cast nuts on tubing. Nuts that have been turned from bar stock will may split. (All the molecules are in the same direction from the swaging process).
Ray R.
Ray R. 76 Edgemonte 26, 455. Refurbishing for fulltiming, Ladysmith, WI
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| Re: [GMCnet] propane tubing question [message #268566 is a reply to message #268554] |
Wed, 31 December 2014 10:37 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Well, I never!
The things I learn casually here!
Ken H.
On Wed, Dec 31, 2014 at 2:19 AM, Raymond Radwanski
...
Please note: For LP gas, always use cast nuts on tubing. Nuts that have
been turned from bar stock will may split. (All the molecules are in the
same direction from the swaging process).
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] propane tubing question [message #268594 is a reply to message #268554] |
Wed, 31 December 2014 20:36 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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Ray R. wrote on Tue, 30 December 2014 23:19I used to do LP home installations in a former life about 30 years ago. We used Type K for underground and K and L for interior. You do not solder LP lines. I think the tubing shown is intended for soldering. I think that regulations change from state to state. Things may have changed since I was involved.
Please note: For LP gas, always use cast nuts on tubing. Nuts that have been turned from bar stock will may split. (All the molecules are in the same direction from the swaging process).
Ray R.
never gave that much thought I suppose that is why flair nuts are always a little rough finished rather then smooth like compression fittings. silver soldered joints should work ok and will hold up better with vibration of the road.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] propane tubing question [message #268640 is a reply to message #268618] |
Thu, 01 January 2015 13:12 |
Kingsley Coach
Messages: 2691
Registered: March 2009
Location: Nova Scotia Canada
Karma: -34
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Senior Member |
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Cast Nuts...is someone making a movie ?
Are the actors and GMC's being selected from the GMCnet ??
On Thu, Jan 1, 2015 at 11:43 AM, Matt Colie wrote:
> roy1 wrote on Wed, 31 December 2014 21:36
>> Never gave that much thought I suppose that is why flair nuts are always
> a little rough finished rather then smooth like compression fittings.
>> silver soldered joints should work ok and will hold up better with
> vibration of the road.
>
> Actually, The long flare nuts used lots of places are machined from bar
> stock. That is why refrigeration people use the forged nuts.
>
> As to vibration, all of the marine or commercial systems I have worked on
> were assembled with flare fittings. Even at the pump (compressor) and there
> is always plenty of vibration there.
>
> Stay with flare, it is easily serviced and repaired, but if you don't have
> a good flaring block, borrow one.
>
> Matt
>
> --
> Matt & Mary Colie - Members GMCMI, GMCES
> '73 Glacier 23 - Still Loving OE Rear Drum Brake with Applied Control Arms
> SE Michigan - Twixt A2 and Detroit
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--
Michael Beaton
1977 Kingsley 26-11
1977 Eleganza II 26-3
Antigonish, NS
I am not an alcoholic; alcoholics go to meetings.
I am a drunk; I go to parties !
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| Re: [GMCnet] propane tubing question [message #268732 is a reply to message #268702] |
Fri, 02 January 2015 18:42 |
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Loffen
Messages: 1087
Registered: August 2013
Location: Norway
Karma: 1
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Matt Colie wrote on Fri, 02 January 2015 18:12Loffen wrote on Fri, 02 January 2015 08:04I bought this one on Ebay for my GMC, a 3/8 coated line, it will be ok to use it right ?
http://www.ebay.com/itm/121506403965
Espen,
That will be great, but you will have to strip the plastic back some to get the nut (don't forget  the nut) down the tubing enough to flair it.
Matt
Yes yes of course strip the plastic 
And no problems with the nuts, I bought my self a little Christmas present, Yes it is full of Nos inch Nuts and more
1973 23' # 1848 Sky Blue Glacier called Baby Blue and a 1973 26'-3 # 1460 Parrot green Seqouia Known as the Big Green,
And sold my 1973 26'-2 # 581 White Canyon lands under the name Dobbelt trøbbel
in Norway
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| Re: [GMCnet] propane tubing question [message #268737 is a reply to message #268732] |
Fri, 02 January 2015 20:25 |
Ray R.
Messages: 26
Registered: December 2014
Location: Ladysmith, WI
Karma: 0
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Junior Member |
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All,
I would like to make a technical correction. I didn't realize that the statement I made was incorrect until I tried to do a search for LP flare nuts. I should have stated that the LP flare nuts with the stronger, random metal particulars are forged and not cast. Search for forged LP flare nuts to see samples to be used. I tried to copy a shortcut to a good sample site but the short cut will not copy. Just Google " Forged LP flare Nuts" and F.W. Webb Co. has a good comparison under the heading "All Nuts Are Not Created Equal". Sorry for the confusion, I should have double checked my facts.
Cast parts are formed by bringing the metal to a molten state. Forged parts are formed under the temperatures of a molten state resulting in the metal particles being closer together and thus stronger. Both have random metal partials.
Most forged LP nuts are short to avoid freezing water cracking the fittings. Fittings are also cracked by over tightening. I have never seen a split forged flare fitting. I have seen many fittings turned from bar stock split.
Specifications for LP installations can be found under the National Fire Protection Association, "ANSI/NFPA 58 Standard".
Again, sorry for the confusion.
Ray R.
Ray R. 76 Edgemonte 26, 455. Refurbishing for fulltiming, Ladysmith, WI
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Ray, Can you provide a source to us nuts for these special cast nuts? 
