FRP Systems Ltd. - Thunder Bay, Ontario

Duct & Stacks

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Ducts

 

FRP SYSTEMS has designed, manufactured, and installed an enormous array of ducting systems. As the field of air pollution is growing at a rapid rate, ducts, scrubbers, and stacks have become a larger portion of our fabricating activity.

The following chart represents industry accepted specifications for fiberglass reinforced polyester round duct dimensions.

 

Reinforced-Polyester Round Duct Dimensions (1)

 

I.D.
Wall Thickness (min.)
Allowable Vacuum (2)
(max.)
Allowable Pressure (2)
Nominal Flange Dia. (O.D.)
Flange Thickness
Bolt Circle Dia.
Bolt Hole Dia.
No. of Bolt Holes
In.
In.
In. of Water
In. of Water
In.
In.
In.
In.
2 1/8 405 750 6-3/8 1/4 5 7/16 4
3 1/8 405 500 7-3/8 1/4 6 7/16 4
4 1/8 210 410 8-3/8 1/4 7 7/16 4
6 1/8 64 350 10-3/8 1/4 9 7/16 8
8 1/8 30 180 12-3/8 1/4 11 7/16 8
10 1/8 16 340 14-3/8 3/8 13 7/16 12
12 1/8 9 280 16-3/8 3/8 15 7/16 12
14 1/8 7 220 18-3/8 3/8 17 7/16 12
16 1/8 6 290 20-3/8 1/2 19 7/16 16
18 1/8 5 240 22-3/8 1/2 21 7/16 16
20 1/8 5 190 24-3/8 1/2 23 7/16 20
24 3/16 9 140 28-3/8 1/2 27 7/16 20
30 3/16 7 100 34-3/8 1/2 33 7/16 28
36 3/16 5 70 40-3/8 1/2 39 7/16 32
42 1/4 10 120 46-3/8 5/8 45 7/16 36
48 1/4 9 100 54-3/8 5/8 52 9/16 44
54 1/4 7 80 60-3/8 5/8 58 9/16 44
60 1/4 6 60 66-3/8 5/8 64 9/16 52

 

(1)

5 to 1 design factor of safety. Also based on 10-foot lengths between stiffener rings for vacuum service.

(2)

These ratings are suitable for use up to 180°F (82.2°C) in pressure service and ambient atmospheric temperatures on vacuum service. For ratings at higher temperatures, consult FRP SYSTEMS.


Sizes over 60" dia. are custom designed to suit service requirements.

Fiberglass Reinforced Plastic Systems  

Stacks

 

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6'-6" Dia. x 108' Stack Complete With Access Ladder & Platform, Aviation Warning Lights & Lighting Arrestor System

6'-0" Dia. x 90' Sulfur Gas Stack

Fiberglass Reinforced Plastic Systems

FRP SYSTEMS stacks are available in a wide variety of diameters and lengths. Each custom-built stack is designed and engineered to accommodate all loading and service conditions.

Fiberglass Reinforced Plastic Systems

 

13'-0" Dia. Boiler Flue Gas Vent Stacks

 

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Boiler Flue Gas Vent Stacks

Boiler Flue Gas Vent Stack


Fiberglass Reinforced Plastic Systems

 

8'-6" Dia x 400' Boiler Vent Stack and Breeching

 

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Photo 1

Photo 2



 

FRP Systems
804 Macdonell St. Thunder Bay, Ontario P7B 4A6 - (p) 807.345.2171 - (F) 807.345.8215 - (E) info@frpsystems.com