Subject: | [Shop-talk] Natural Gas vs Propane Grills |
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From: | TR3driver at ca.rr.com (Randall) |
Date: | Sat, 2 Apr 2011 15:12:04 -0700 |
References: | <AANLkTineLbYkVvPoQmyDTnmpHx_oF9mTJdbgftc630bH@mail.gmail.com><989191743.439910.1301748528539.JavaMail.root@sz0129a.westchester.pa.mail.comcast.net><DD35EDD670C8487CA1FC718EB2F1BDDD@EntCent>, <AANLkTim2o_GuRtFHq57i6-6BHef845jz5bNofrTd52jR@mail.gmail.com>, <D8C88C2A6ED44521845CC68DC52501B2@EntCent> <COL115-W57336A556BB0DB04D089D2CCA10@phx.gbl> |
> Does the > last two feet > limit all that came before it? Don't forget, the area of the pipe is proportional to the square of the diameter. So your 1/4 pipe has only 1/4 the cross-sectional area of the 1/2" pipe. Think of putting your thumb over the end of a hose. Just for chuckles, I found an on-line calculator and put some numbers into it. At 1 cfm (about 60,000 Btu/h), the drop through 2 ft of 1/4" pipe is more than the pressure at the regulator. IMO even the 16 feet of 1/2" is reducing the output at least a little bit, depending somewhat on how big the burner is. -- Randall |
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