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Underground sawdust extraction system

Underground sawdust extraction system

Underground sawdust extraction system

(OP)
I am currently working on the design  of a sawdust  extraction system for a small industrial woodshop which must  run underground.  I am looking for ductwork suitable for this application.  I have been recommended to  use pvc-coated galvanized ductwork.  However,  I am concerned about the internal pvc coating producing static electricity buildup and hence a severe accident in the shop. Can the galvanized steel core layer produce and adecuate grounding? Has anyone used this type of duct before in other applications for dust conyeying systems?

RE: Underground sawdust extraction system

I think it is common to pull a bare copper wire through the duct to serve as a ground when using non-conductive pipes for saw dust collection.  Seems like that would work here.

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