There may be cases when you want to apply Duct Incorporated duct to an existing system. Duct Incorporated makes adapters for this purpose. These can be provided in flanged-to-rolled by simply requesting machine adapters that can be attached to the end of existing duct (spiral or straight) so that Duct Incorporated LaserLock™ ducting can be used.
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PAINTING GALVANIZED COMPONENTS
CAULKING USED ON SEAMS OF COMPONENTS
DUCT INCORPORATED FLANGE/DUCT SPECIFICATIONS
DEFINITIONS OF END CONFIGURATIONS
All “fit or clamp together” ducting systems allow for some degree
of leakage and are not sold as airtight systems. Duct Incorporated offers
special clamp gasket material for high heat that may be enhanced by applying
sealants to the individual rolled ends. However, the Duct Incorporated system
is sold as a quick way of installing and modifying ductwork while retaining
the usability of each component. Duct Incorporated ducting is meant to be
taken apart, re-assembled, stored and moved. Completely eliminating the possibility
for leakage jeopardizes the inherent benefits of the duct system.
Duct Incorporated is designed to provide tight sealing and efficient airflow
under negative pressures. The following information is provided for piping
situations where fan sizing is of extreme importance. This data was obtained
using standard components and was performed in accordance with SMACNA, “HVAC
Air Duct Leakage Test Manual.” This chart gives the leakage rate per
joint of duct at various pressures. To utilize the chart, count the number
of clamps (this equals the number of joints) per size and multiply by the
number given beside the
corresponding diameter under the applicable pressure. These numbers assume
that the product is correctly installed free of dents in the joining ends,
and that the gasket is in place. Special gasket materials and sealants will
increase sealing capabilities.
While Duct Incorporated is currently unaware of any method of evaluating dust
collection piping alone, the following data is presented using the criteria
for all duct, including HVAC. This data is presented only for the purpose
of indicating acceptability of Duct Incorporated ducting for dust/fume removal
in negative pressure situations and should not be confused with ducting that
uses tape or gaskets as sealants in the positive conveyance of air.
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How to Read the Part Number:
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Krylon Industries. Tough Coat, Acrylic Enamel #1760 Aluminum.
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Duct Incorporataed ducting has been tested for strength/collapsibility. The piping was exposed to constant positive pressure and vacuum to a maximum capacity of 85" WG. None of the pipe showed signs of deformation during the test.
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Scotch Seal® 2084 metal sealant, 3M ID #62-2084-2631-2. Ingredients: acetone, acrylonitrile, kaolin, phenolic resin, rosin ester salicyclic acid, aluminum pigment zinc oxide, amorphous silica.
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Component material
Ductwork
Duct should be supported as follows
Supports should be installed to provide lateral stability to the entire
piping system. Each installation is unique and should be evaluated.
Duct diameters for Rolled and Flanged as follows
Rolled
Flanged
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The following methods should be used for comparison and budgetary purposes only! By no means should they be used to confirm a job installation.
A + B = Man Hours
A. Straight runs and trunk lines
B. Machine connections
Quick method = (total number of ports) x 3 hours each = Y
Y x 2 = Ducting System Total Man Hours
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