Inquiry (采购产品): Vacuum System Extension We have a Hoffman Air vacuum system in fume treatment plant to clean the different floor levels. The material in mainly alumina ore. The extension we would like to put in will use 3in. sch. 40 steel pipe with 90 and 45 degree long radius bend. Where the tie in is made it will take a 45 degree YL. I have three locations in the plant that will take the same amount of material to do these extensions. **** Hidden Message ***** David Burl 13662 Company: Alcoa East Massena E-mail: david.burl@alcoa.com **** Hidden Message ***** david.burl@alcoa.com