heat treat facility

[CEJM]

working on project existing heat treat facility, existing oil quenching protected by co2 system. the remainder of plant has 9 furnaces.

my question is my design of .30.3250 with 500 outside hose. entire facility will be dry systems. there may be some areas that could be reduced such as maintenance shop and shipping.

i would like to install fire pump and run a 8in bulk main thru the plant, drop off tees for dry pipe valves. the problem i have is there is no approved heat trace.

all imput would be will be appreciated

 

[skdesigner]

Here's a link to some listed heat tracing:

http://www.emersonswan.com/ckfinder/userfiles/files/XLTrace_Fire_Sprinkler_DG_0110

 

[LCREP]

See FM Data Sheet 7-41 regarding Heat Treatment 13 pages of info on the topic, when they go they go good big hazard, much more then just sprinkler protection, the Data Sheet is free from FM. Also contact the insurance carrier engineering department for advice.

 

[MatthewJWillis]

Never seen heat on the System Riser.
Thought that was a no no.

R/
Matt

 

[CEJM]

matthew, please expand on your comment

 

[TravisMack]

As Matt states, I thought the dry valve had to be in a heated enclosure and you couldn't use heat tracing for the wet side of the dry valve assembly.

Travis Mack
MFP Design, LLC

http://www.mfpdesign.com

"Follow" us at

https://www.facebook.com/pages/MFP-Design-LLC/92218417692

 

[CEJM]

according to the info it is nfpa and ul approved

 

[skdesigner]

See NFPA 13-2013 7.2.5.2, explains heat tape can't be used in lieu of heated valve enclosures. My link was just in response to your last sentence - 'The problem I have is no approved heat trace'.

 

[CEJM]

i am running bulk main dropping a tee off at each dog house, the dog houses will be heated.

 

[MatthewJWillis]

7.2.5.2.3 Heat tape shall not be used in lieu of heated valve
enclosures to protect the dry pipe valve and supply pipe
against freezing.

Emphasis mine...

 

[Cidona]

Would seem as long as the dog houses are heated then the feed main to the dog houses could be heat traced per NFPA 13 2013 8.16.4.1.3.
If the heat tracing is just protecting feed mains then my understanding is that the heat tracing just has to be approved. If the heat tracing is protecting branchlines then the heat trace has to be specifically Listed for use with branchlines.

 

[CEJM]

I called tyco and explained to them as how I plan on using this heat tape. they assured me that for my application it would be allowed.

I am going to submit copy to our local fire prevention bureau for review. to make sure they will allow this product to be used.

 

[stookeyfpe]

A few lessons learned on heat tracing:

1) Ensure the power supply is on its own disconnect and properly sized. I've seen 20 Amp circuit breakers specified for 40 Amp power supplies
2) Your calculations need to address how hangers will either be insulated or left exposed.
3) Location and proper installation of the Resistant Temperature Device (RTD) needs to be clearly identified.
4) Who is going to insulate the pipe and what type of insulation will be used?
5) The heat tracing system are an assembly of a listed cable with a listed controller, listed RTD, and listed cable splicing connections. All of these details need to be worked out before the installation.

 

[CEJM]

STOOKEYFPE, THANK YOU FOR YOUR RESPONSE, I WILL HAVE THE ELECTRICAL CONTRACTOR INSTALL HEAT TRACE. I WILL CONTACT TYCO AGAIN AN GO OVER THE INSTALLATION, CONTROLLERS, MAINTENANCE SCHEDULE REQUIRED.