Why would there be chunks of cement?

Craig L. Prahl 
Fire Protection Group Lead/SME
Direct - 864.920.7540
Fax - 864.920.7129
Direct Extension  77540
CH2M is now Jacobs.
200 Verdae Blvd.
Greenville, SC  29607
craig.pr...@ch2m.com
http://www.jacobs.com

-----Original Message-----
From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On 
Behalf Of Roland Huggins
Sent: Monday, February 19, 2018 1:54 PM
To: sprinklerforum@lists.firesprinkler.org
Subject: Re: Underground Dry System Pipe Type [EXTERNAL]

Dont you worry about the inevitable chunks of cement becoming a problem. 

Roland


Roland Huggins, PE - Senior VP Engineering
American Fire Sprinkler Assn.    
Dallas, TX
http://www.firesprinkler.org <http://www.firesprinkler.org/>

Fire Sprinklers Saves Lives




> On Feb 19, 2018, at 9:35 AM, Prahl, Craig/GVL <craig.pr...@ch2m.com> wrote:
> 
> Cement lined ductile iron.  If you use standard DI, and a standard 
> atmospheric sourced air compressor you can have rust and scaling buildup with 
> ambient air inside pipe in contact with cooler ground temps.
> 
> How are you going to slope underground pipe back to an aboveground valve 
> room?  Basement level valve room?
> 
> 
> Craig L. Prahl
> Fire Protection Group Lead/SME
> Direct - 864.920.7540
> Fax - 864.920.7129
> Direct Extension  77540
> CH2M is now Jacobs.
> 200 Verdae Blvd.
> Greenville, SC  29607
> craig.pr...@ch2m.com
> http://www.jacobs.com
> 
> -----Original Message-----
> From: Sprinklerforum 
> [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of 
> Reed A. Roisum, SET
> Sent: Monday, February 19, 2018 12:11 PM
> To: sprinklerforum@lists.firesprinkler.org
> Subject: Underground Dry System Pipe Type [EXTERNAL]
> 
> I asked a similar question a number of years ago and it appears as though the 
> consensus at that time was that dry-pipe system underground pipe should be 
> ductile iron.  We have an application where the dry-pipe system leaves the 
> valve room and goes underground and then extends above ground.  Is ductile 
> iron the best option for the underground portion?  We are able to slope to 
> drain back to the valve room.
> 
> Thank you.
> 
> Reed Roisum
> 
> 
> Reed A. Roisum, SET | Karges-Faulconbridge, Inc. | Senior Fire 
> Protection Designer | Fargo, ND | direct: 701.552.9903 | mobile: 
> 701.388.1352 | KFIengineers.com<http://www.kfiengineers.com>
> 
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