scope:

This manual covers the physical properties, manufacture, construction, installation and methods of testing fiberglass reinforced thermosetting plastic duct, intended for air conveyance in corrosive environments, as manufactured by hand lay-up, spray-up, and filament winding fabrication techniques.

• Round duct 4 to 72 in. (100 to 1800 mm) diameter

• Rectangular duct 12 to 96 in. (300 to 2400 mm) diameter

• Static pressures -30 to +30 in. wg (-7500 to +7500 Pa)

• Temperature range ambient to 180ºF (82ºC) (Depending on resin selection)

PURPOSE

This manual proposes to accomplish the following objectives:

a. To develop minimum standards for the fabrication and installation of FRP duct systems, and also as a reference for contract operations.

b. To develop a source of reference data for design engineers, industrial engineering departments, and pollution control authorities.

c. To provide a responsible source of documentation and terminology for ventilation and air conditioning equipment, establishing an accurate reference for thermoset plastics as they are used in the sheetmetal duct industry.