I've seen them but they weren't from the pipe, they were typically from some 
yahoo tossing junk into an open pipe the never got cleaned or flushed out.

Not saying it couldn't happen but there are plenty of 40-50+ year old 
installations that never had any indication of delamination of the cement 
lining.


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 2:40 PM
To: sprinklerforum@lists.firesprinkler.org
Subject: Re: Underground Dry System Pipe Type [EXTERNAL]

Dont think NEW but old and decrepit (like me - lol).  AM I the only one that 
has seen pieces of concrete captured when flushing systems or doing water flow 
tests?


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 11:16 AM, Prahl, Craig/GVL <craig.pr...@ch2m.com> wrote:
> 
> 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 <mailto:craig.pr...@ch2m.com> 
> http://www.jacobs.com <http://www.jacobs.com/>
> 
> -----Original Message-----
> From: Sprinklerforum 
> [mailto:sprinklerforum-boun...@lists.firesprinkler.org 
> <mailto:sprinklerforum-boun...@lists.firesprinkler.org>] On Behalf Of 
> Roland Huggins
> Sent: Monday, February 19, 2018 1:54 PM
> To: sprinklerforum@lists.firesprinkler.org 
> <mailto: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/> 
> <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>
>> 
>> _____________________________________________________________________
>> _ This email has been scanned by the Symantec Email Security.cloud 
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>> _____________________________________________________________________
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