[TheForge] Re: TheForge Digest, Vol 57, Issue 18
David E. Smucker
davesmucker at hotmail.com
Tue Oct 21 14:08:50 EDT 2008
Typical in house pressure is 6 to 7 inches of water. Delivery pressure varies but might be 5 to 10 psi. Most commerical would be the same. Industrial pressure on the other hand, can be much higher.
I don't know what it is now but when we lived in the Pittsburgh area in the 1970's the local delivery pressure was much higher and we had storage wells in the area. I don't remember for sure but think it was around 100 psi. In that area gas meters and the regulator had to be located 50 feet from the house because of the high delivery pressure. Pressure in the house was still in the 6 to 7 inches of water.
Dave
From: Grant Marcoux
Sent: Tuesday, October 21, 2008 1:30 PM
To: Blacksmithing List Sponsored by ABANA
Subject: RE: [TheForge] Re: TheForge Digest, Vol 57, Issue 18
What is the normal NG delivery pressure for homes vs. commercial spaces? I know the size of the delivery pipes varies, but I don't know if the pressure does....any body hip on this? Grant
-----Original Message-----
From: theforge-bounces at mailman.qth.net [mailto:theforge-bounces at mailman.qth.net]On Behalf Of craig.schaefer at verizon.net
Sent: Tuesday, October 21, 2008 9:09 AM
To: theforge at mailman.qth.net
Cc: theforge at mailman.qth.net
Subject: Re: [TheForge] Re: TheForge Digest, Vol 57, Issue 18
The trouble with NG is that the normal residential pressure isn't enough to run a venturi burner effectively. Most NG forges are blown to take advantage of a big fuel supply under low pressure and adding enough air to it.
CraigS
Gresham, OR
Oct 21, 2008 02:21:00 PM, theforge at mailman.qth.net wrote:
Would a natural gas forge require added air, i.e. to be blown, to
compare, heat-wise, with a propane?
JA
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> Today's Topics:
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> 1. blown vs. Venturi forges (bistline at md.metrocast.net)
> 2. Re: blown vs. Venturi forges (craig.schaefer at verizon.net)
> 3. Re: blown vs. Venturi forges (Jerry Frost)
>
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>
> Subject:
> [TheForge] blown vs. Venturi forges
> From:
> bistline at md.metrocast.net
> Date:
> Wed, 15 Oct 2008 12:23:29 -0400 (EDT)
> To:
> theforge at mailman.qth.net
>
> To:
> theforge at mailman.qth.net
>
>
> I currently have a side arm burner forge. I am thinking about building a
> forced air burner. Are the forced air burners more efficent in fuel
> consumption?
>
>
>
>
>
> ------------------------------------------------------------------------
>
> Subject:
> Re: [TheForge] blown vs. Venturi forges
> From:
> craig.schaefer at verizon.net
> Date:
> Wed, 15 Oct 2008 11:44:23 -0500 (CDT)
> To:
> theforge at mailman.qth.net
>
> To:
> theforge at mailman.qth.net
> CC:
> theforge at mailman.qth.net
>
>
> Probably not since they are adding air, you need to add fuel as
> well. They DO get hotter more easily.
>
> CraigS
> Gresham, OR
>
>
> Oct 15, 2008 04:24:18 PM, theforge at mailman.qth.net wrote:
>
> I currently have a side arm burner forge. I am thinking about
> building a
> forced air burner. Are the forced air burners more efficent in fuel
> consumption?
>
>
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> Subject:
> Re: [TheForge] blown vs. Venturi forges
> From:
> "Jerry Frost"
> Date:
> Wed, 15 Oct 2008 10:47:15 -0800
> To:
> "Blacksmithing List Sponsored by ABANA"
>
> To:
> "Blacksmithing List Sponsored by ABANA"
>
>
> No.
>
> Properly tuned a burner is a burner is a burner. The proper ratio for
> a neutral Air:Propane flame is 17.5:1 it doesn't make any difference
> how you put the two together and mix them.
>
> A gun (blown) burner is easier to make, tune and are less sensitive to
> back pressure BUT they're more expensive and tie you to electric service.
>
> Naturally aspirated burners require more precision to make and tune
> and are more sensitive to back pressure and stray breezes BUT are
> cheaper to make and work anywhere.
>
> In either case you're introducing a specific amount of propane to a
> specific amount of air and hopefully mixing them thoroughly before
> they get to the furnace chamber. For any specific amount of propane
> there are a specific number of BTUs available. Period.
>
> Frosty
> -------------------------------
> If it ain't forged
> it ain't real.
> Wrought iron is.
> The FrostWorks
>
> Meadow Lakes, AK.
>
>
> From:
>
>
>> I currently have a side arm burner forge. I am thinking about building a
>> forced air burner. Are the forced air burners more efficent in fuel
>> consumption?
>>
>>
>>
>
>
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