Grease Duct Connection to Upblast Fan

[tlhoo]

Typical kitchen grease duct application, fully welded carbon steel. Is the connection to the roof-mounted fan welded as well, typically speaking of course. Or is it flanged and gasketed?

Thanks


Also, separate, but related question. In a fume hood application, with welded, stainless steel exhaust ductwork, is the connection to the fume hood (typically a nominal, round size) a welded connection as well? Is this typically how its done? There aren't any chemicals in use in the hood that will "attack" gasketing, but I am just curious how this connection is typically made.

Thanks again.

 

[DrRTU]

If it’s a utility set, then attach a canvass to the inlet with (bolts or tek). Fab the canvass with bolted flange on the inlet. Install a companion flange with gasket on the exhaust duct. On an upblast centrifugal, hang the duct from the curb. Try these

http://www.accuduct.com/prod01.htm