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Still in the design phase for a new dry pipe fire sprinkler system retrofit into an existing attic space. Due to the existing arrangement of the building it may be significantly easier to route a portion of the system exposed to the outside.
My only concern with doing so, along with ensuring that the exterior of the exposed pipe is well protected, would be the potential difference in temperature between a cooler outside and a potentially much warmer attic. Would condensation not build-up when the cooler outside cools the pipe as it enters the warmer attic? I may be overthinking this, but how best could I address potential condensation concerns in a scenario like this? Posted anonymously by a member for discussion. Discuss this | Submit a Question | Subscribe
3 Comments
Dean Melanson
4/19/2019 08:23:38 am
I have similar issues with a dry standpipe that runs through an attic, the outside, and a heated area. We do get significant amounts of condensation build-up. The complex maintenance conduct a weekly inspection and draining of the drum drip low point drains on the system. They do this even more aggressively during freezing weather. These remote manual drain devices are required if the system cannot be arranged such that all lines drain back to the control valve area. 4/19/2019 10:50:06 am
In order for condensation to occur inside the dry pipe, the air in the attic space would have to be below the dew point temperature of the air in the pipe. The use of a nitrogen generator system is frequently used to mitigate concern of water forming inside the dry pipe. Drum-drip drains are still used for capture of water, and should be checked regularly.
PETE
4/19/2019 07:39:31 pm
General Air Products and others make a combination compressor/ dessicant dehumidifier. Leave a Reply. |
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