[TheForge] Re: TheForge Digest, Vol 57, Issue 18

[Grant Marcoux]

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:
  >
  > 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)
  > 
  >
  > ------------------------------------------------------------------------
  >
  > 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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