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SPIRAL DUCT
Our manufacturing capability in spiral duct includes galvanized and stainless steel pipe – as well as aluminum for special applications..
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Tube Forming |
Tap Installation |
Gore Locking |
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Quality products at affordable prices |
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Full Range Of Spiral Pipe In Stock |
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Fittings Ready For Shipment |
Dimensional data for fittings is available. However, SSei maintains its "If you can draw it, we
can make it" theory for custom systems.
Fittings are manufactured with tack welds or full welds. Standing seam is also available upon
request.
Additional accessories such as floorsweeps, volume dampers, insulation ends, bellmouths, access doors, blastgates and spin-in collars are also available.
SSei conforms with industry standards for operating pressures within the following gauges:
| Spiral Duct | Fittings | ||
| Galvanized | 28 gauge - 16 gauge | 28 gauge - 16 gauge | |
| Stainless | 26 gauge - 18 gauge | 26 gauge - 18 gauge |
SSei has a complete line of dual wall
pipe and fittings.
Each piece is fabricated with an inner metal liner surrounded
by insulation and covered by a solid metal outer shell.
All Dual Wall ductwork
is available with 1, 2, or 3-inch insulation in galvanized steel, stainless
steel and aluminum material.
Concentricity of liner to outer shell
is maintained by mechanical means on all fittings and pipe with more than 1" of
insulation.
The inner liner is available in either
perforated or solid metal. Perforations are 3/32 inch diameter with an overall
open area of 23%.
Inner liners are 24 gauge for 3" through 36" round and 22
gauge for 38" through 58" round.
The sheet metal liner protects the insulation
from airflow velocities while it checks fiberglass erosion.
The insulation in our dual wall pipe and
fittings has both acoustical and thermal benefits.
It can reduce radiated noise
by 25 dB or more, compared to fiberglass duct board.
Our standard 1-inch
insulation has a thermal conductance of 0.27 Btu/hr x sq. ft. x degree
Fahrenheit.
Dual wall pipe and fittings are available with insulation
thicknesses of 2-inches (0.13 Btu/hr x sq. ft. x degree Fahrenheit) and 3-inches
(0.09 Btu/hr x sq. ft. x degree F).
Where fiber erosion is of special concern,
we would wrap the sheet metal liner with a barrier material prior to the
insulation being attached to the liner.
The outer shell will be fabricated per
1995 SMACNA duct construction standards for 4" W.G.
This outer shell is
available in galvanized or stainless steel material for
medium pressure systems. The outer shell can be sealed O.D. upon
request.
Dual wall pipe and fittings are joined by
slip connectors and fitting collars. The inner liner connectors are extended to
mate the inner liners before the outer shells are mated.
The outer shell may be
joined by slip fit, flanges, Ductmate Spiralmate™ rings or AccuFlange™
Our sales staff are available to provide you with a quotation per your material list, shop drawing, or blueprints.
Copyright 2003 © Silver Sheet Enterprises, Inc
