Flame Guard - Design Considerations
FlameGuardTMFire Retardant FRP PROCESS DESIGNREQUIREMENTSCUSTOMER / PROJECT:Most reinforced plastic duct is used in corrosive fume exhaust and that is the area wewill address. OSHA requirements and good business practice dictate using longestablished guidelines for designing fume pick up hoods and exhaust systems fromprocess connections to exhaust safely away from personnel. Two such guidelines arethe American National Standard Fundamentals Governing the Design and Operation ofLocal Exhaust Systems, , or Industrial Ventilation, a manual published by theAmerican Conference of Governmental Industrial Hygienists designing a fume exhaust system , the objective is to keep the contaminants out of thegeneral process area using the smallest amount of air movement (CFM) air movement means higher operating costs, bigger environmental controlunits (scrubbers, incinerators, stacks), and generally higher first costs ( duct size).
A = cross sectional area of the (duct, hood, etc.) system in square feet V = velocity in linear feet per minute TP = total system pressure, in inches of water SP = static pressure of the system, in inches of water VP = velocity pressure, in inches of water TP = SP + VP DESIGN PRINCIPALS: Flow of air is quantifiable as the product of the cross ...
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