I have also challenged using 40 gal as the trigger point. The
substantiation said that value was piked because it was where special
calculation were required (remember this was for changing the 07 where
there were NO other calculations thus that was BS). The old 40 gal
was a trigger for ECONOMICAL considerations between AF and dry pipe
which was no longer valid so deleted. We need to see at what point it
takes too long before the AF is discharged and we are getting just
water out in making the decision on what size requires the DW. 40 gal
is just too bloody small.
We shall see. Any one smell tar in the air?
Roland
On Sep 19, 2008, at 11:43 AM, Travis Mack, SET wrote:
I think that I will just use this diagram in the future until there
is more
clarification on the issue from NFPA 13 officials. This will really
impact
those of you in the northern part of the country with respect to AF
systems40 gallons. The viscosities get way out of hand real quick at
those lower
temps.
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