Home Page link

LPG supply line diameters

Building Construction - Building Construction Industry Discussions. 

Page 3 of 3       << first < 1 2 3 Bookmark this page:  YahooMyWeb Yahoo!  Google Google  Windows Live Favorites Windows Live  del.icio.us del.icio.us  digg digg  Add to Netscape Netscape
Subject Author Date
LPG supply line diameters Bob 12-24-2006
If you were  Registered and logged in, you could reply and use other advanced thread options
Posted by Bob on December 25, 2006, 5:09 pm
On Mon, 25 Dec 2006 10:15:21 -0800, dpb wrote:


>
> The other poster noting high vs low pressure distribution _probably_ has
> the right idea.

Right - he may be on to something.

>
> Where's the regulator installed? That's the key as that controls the high
> to low pressure transition point.

This I do not know right now. I can go check in a day or two. But, if the
regulator is at the manifold it would mean that the installation is using
flexpipe for high pressure and I don't think that is appropriate -- I
think I remember the flexpipe had "5 psi" written on it. Would that be low
pressure only?

>
> LP is no more hazardous than natural gas, but no less, either...both
> deserve respect.

LPG may be a little more hazardous. One difference is that it is heavier
than air where NG is lighter than air. This was told to me by the guy who
sells gas fireplace inserts. He said that is why LPG, but not NG, requires
a pilot light by code -- so gas does not accumulate. I think the idea is
that NG will tend to disperse but LPG will not.

Bob

Posted by Steve Barker LT on December 25, 2006, 5:40 pm
LP is more dangerous from the stand point that it is heavier than air. It
will settle to low spots and go undetetected whereas natural will float
around and be smelled.

--
Steve Barker



>
> Bob wrote:
> ... [snip more on LPG installation to the nub of the question]...
>> The cook-top specifies minimum 5/8 inch flex line supply and the plumber
>> has used 3/4 inch from the manifold to the cook-top (about 30 feet).
>> That's good, but he only has 1/2 inch from the tank to the manifold
>> (about 15 feet). Seems like this is insufficient for the cook-top alone,
>> much less the furnace and fireplace as well.
>>
>> I plan on asking the plumber for details on how he established these line
>> sizes and contacting the gas company to see if they will inspect the
>> installation.
>>
>> Am I seeing this correctly? Any suggestions?
>
> The other poster noting high vs low pressure distribution _probably_
> has the right idea.
>
> Where's the regulator installed? That's the key as that controls the
> high to low pressure transition point.
>
> The LPG service company/supplier should, in fact, require that they
> inspect the installation before beginning service. Around here,
> anyway, that's part of the deal. If not included as a service, I'd ask
> for it and pay the service fee before going on. This should, of
> course, also include the leak/pressure test just as in a natural gas
> installation.
>
> LP is no more hazardous than natural gas, but no less, either...both
> deserve respect.
>



Posted by Bob on December 26, 2006, 8:27 pm
On Sun, 24 Dec 2006 07:58:59 -0600, I wrote:

<clip>

>
> I plan on asking the plumber for details on how he established these line
> sizes and contacting the gas company to see if they will inspect the
> installation.
>

In response to my own post -- I found out that (believe it or not!) the
Texas Railroad Commission is responsible for inspecting LPG installations
and the gas company won't deliver until there is a "passed" sticker from
them.

What I don't know is if thie is just a "safety" inspection or if it will
tel me if there is enough capacity to cover all my LPG needs.

Bob

Posted by Raider Bill on December 27, 2006, 12:37 pm

I just installed a LPG vent free fireplace insert at my house.
Destructions called for 5/8 supply line which really didn't make mush
sense as it connects to a 3/8 flare fitting on the appliance. Not much
more than a 1/4 opening in the 3/8th flare.
Works great though, getting me through these hard cold florida winters.


Posted by Art on December 27, 2006, 8:46 pm
Bob wrote:
> On Sun, 24 Dec 2006 07:58:59 -0600, I wrote:
>
> <clip>
>
>> I plan on asking the plumber for details on how he established these line
>> sizes and contacting the gas company to see if they will inspect the
>> installation.
>>
>
> In response to my own post -- I found out that (believe it or not!) the
> Texas Railroad Commission is responsible for inspecting LPG installations
> and the gas company won't deliver until there is a "passed" sticker from
> them.
>
> What I don't know is if thie is just a "safety" inspection or if it will
> tel me if there is enough capacity to cover all my LPG needs.
>

Be there for the inspection and ask questions. Specifically "Was it done
right?" or "Would you be okay with this in your house?". Most inspectors
I have met are nice guys that don't mind telling you what they think.
Passing code and having a good job are two different things and every
inspector knows that.

--
Art

Page 3 of 3       << first < 1 2 3
Similar ThreadsPosted
high voltage electrical & water supply line November 19, 2006, 8:04 pm
well water supply July 26, 2008, 2:27 pm
Wholesale Electrical Supply May 6, 2008, 8:18 am
powervent exhaust and gas supply location July 25, 2007, 8:32 pm
Supply all kind of high quality aluminum profiles for architectureal use March 7, 2007, 3:19 am
Zero Lot Line August 31, 2006, 5:47 pm
Connecting new 3" sched40 to clay line April 18, 2007, 10:04 pm
Adding to an iron water line July 24, 2007, 11:46 am
Re: Repairing a broken drain line September 13, 2007, 10:30 pm
Re: Repairing a broken drain line September 22, 2007, 12:14 am

Contact Us | Privacy Policy

XML SitemapXML Sitemap