Larry, I'm not sure everybody has it wrong. I think several people have noted that there are no longer the limits on velocities in risers, overhead mains, and branch lines as there were previously. In looking at the last copy of 2-8N that I have there is no mention of it as well.
The information you referred to in 3-0 on page 39 and subsequently in 40 is not by any stretch a rule for velocity in a sprinkler system, but is more appropriately described as a means of performing hydraulic calculations where velocity pressures are taken into account, which is quite a different matter altogether. Those are just my thoughts. -- PARSLEY CONSULTING Ken Wagoner, SET 760.745.6181 voice 760.745.0537 fax [email protected] <mailto:[email protected]> e-mail www.ParsleyConsulting.com <http://www.ParsleyConsulting.com> website Larry Shulman wrote: > Well, everybody here has got it wrong so far. The FM Global rules for > velocity in sprinkler systems (there really are none) can be found in Data > Sheet 3-0, near the bottom of page 39. Velocity for fire pumps is 15 ft/sec > and is found in DS 3-7, page 9, and the velocity for underground mains is 20 > ft/sec and is found in DS 3-10, page 8. > > > -----Original Message----- >> From: Todd Williams <[email protected]> >> Sent: Oct 27, 2009 2:19 PM >> To: [email protected] >> Subject: Re: FM's Max. Velocity >> >> If there is any (and I don't believe so), it is probably 2-8N >> >> >> At 04:00 PM 10/27/2009, you wrote: >> >>> Can someone tell which FM Data sheet talks about the max velocity in a >>> wet system? >>> >>> >>> >>> Mike Brown >>> >>> Project Designer >>> >>> Sunland Fire Protection >>> >>> 1218 Elon Place >>> >>> High Point, NC 27263 >>> >>> Ph. 336.886.7027 Ext. 140 >>> >>> Fax: 336.886.7024 >>> >>> WWW.SUNLANDFIRE.COM <http://WWW.SUNLANDFIRE.COM> >>> >>> >>> >>> _______________________________________________ >>> Sprinklerforum mailing list >>> [email protected] >>> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum >>> >>> For Technical Assistance, send an email to: [email protected] >>> >>> To Unsubscribe, send an email to:[email protected] >>> (Put the word unsubscribe in the subject field) >>> >> Todd G. Williams, PE >> Fire Protection Design/Consulting >> Stonington, Connecticut >> www.fpdc.com >> 860.535.2080 >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum >> >> For Technical Assistance, send an email to: [email protected] >> >> To Unsubscribe, send an email to:[email protected] >> (Put the word unsubscribe in the subject field) >> > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > > _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
