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Combustibility requirements for pipe insulation on roofs?

Question asked by samarasp on Dec 16, 2016

I am looking for combustibility requirements for HVAC piping insulation on roofs. 

Can't find anything in the NFPA standards. Is it maybe an ASHRAE standard requiring limited combustibility for insulation on pipes running on the roof of a building, or can I just use any type of insulation?

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