Showing 1–12 of 84 results

Commercial and Industrial HVAC Spiral Pipe and Duct Fittings

Sheet Metal Connectors, Inc. (SMC) produces spiral pipe formed from a coil of metal into a rigid steel tube with a 4-ply spiral lockseam. It has a smooth interior for low friction loss with the grooved seam entirely on the outside. Spiral pipe sections can be joined together by a Complete Seal Connection E-Z Flange with Barrel Clamp, E-Z Flange Jr. with Barrel Clamp, Standard spiral pipe Connector or Companion Angle Rings. Spiral pipe is used for commercial and industrial HVAC ductwork.

Spiral Pipe & Duct Fittings Catalog

Single-Wall HVAC Spiral Pipe & Fittings

SMC Single-Wall Spiral Pipe and Duct Fittings with Complete Seal, E-Z Flange and Barrel Clamp or Standard Slip Connection


Single-Wall Spiral Pipe

Single-wall spiral pipe duct has a resistance to crushing approximately 2 1/2 times that of longitudinal lockseam or welded pipe. Optional corrugations are available which increase the rigidity of the pipe by approximately 300%. Pipe sections can be joined together by a Complete Seal Spiral Pipe Connector, E-Z Flange with Barrel Clamp, E-Z Flange Jr. with Barrel Clamp, Standard Spiral Pipe Connector, or Companion Angle Rings.

Single-Wall Materials

*PVS specification book available
**Call factory for sizes over 60" in diameter



Single-Wall Fittings

SMC spiral fittings are manufactured with a stitch weld seam, lap seam (riveted, tack weld or solid weld), elbow lock seam, standing seam or butt weld seam. These may be with or without duct sealant.

All spiral duct fittings can be manufactured with:
  • Complete Seal Spiral Pipe System – 3” to 24” Diameter
  • E-Z Flange Jr. with Barrel Clamp – 6” to 24” Diameter
  • E-Z Flange with Barrel Clamp – 26” to 96” Diameter
  • Standard Spiral Pipe End
  • Companion Angle Ring

Single-Wall Connectors

Complete Seal Fittings - 6” to 24” Diameter

Complete Seal fittings are manufactured from galvanized steel meeting spec ASTM A-653 (Lockforming quality). They feature a double legged EPDM gasket which creates a virtually airtight connection when slipped into spiral pipe. The gasket is mechanically attached to the fitting with a 180 degree hemmed edge. This hem gives added rigidity to the fittings, ensures that the gasket will never slip out of place and makes a safe rounded edge for the installer.
*Complete Seal is currently available on Galvanized Fittings only.


E-Z Flange with Barrel Clamp - 26” to 96” Diameter

The E-Z flange with barrel clamp can be factory installed or shipped loose for field installation. A set consists of two E-Z flanges and one barrel clamp. For field installation, the installer attaches the E-Z flange to the pipe and fittings. Next the installer applies the gasket to one flange, mates the two flanges together and attaches the barrel clamp. SMC can also install E-Z flanges. Factory-installed flanges are spot welded and internally sealed on all ends of the spiral pipe and fittings.


E-Z Flange Jr. with Barrel Clamp - 6” to 24” Diameter

The E-Z Flange Jr. is a 5/8” flange turned out 90° on each end of the spiral duct and fittings. The installer applies a gasket on one flange, mates the two flanges together, and attaches the barrel clamp. For field cuts a 5/8” flanged sleeve is available. Trim the spiral pipe to the measured length and attach the sleeve.


Standard Spiral Pipe Connector

Pipe-to-Pipe connections are made by using a fitting size coupling that slips inside the mating pipe sections. A stop bead runs around the middle of the coupling to center the coupling in the connection. Secure the connection by installing sheet metal screws through the outer shell of the duct, 1/2 inch from the stop bead.


Companion Angle Rings - Pressed and Rolled

Companion angle rings are for end connections whenever a smooth interior surface or intermediate stiffening is required. Rings are manufactured from mild steel. Companion angle rings can be factory installed or shipped loose. Companion angle rings can be attached by solid weld, tack weld, or van stone connection. spiral pipe weight gauge chart

Two Piece Pressed Solid Welded Elbows

Pressed elbows and angles are resistance welded with copper on both the heel and throat. All pressed fittings are manufactured from extra deep drawing steel (EDDS) in accordance with ASTM-A653. Pressed fittings are precision drawn, tolerances must be within + or - .002 thickness to assure a quality product at all times. All pressed fittings are made of 24 Ga. or 22 Ga. Galvanized material with a G60 or better coating thickness and are chemically treated to retard white rust.



Standing Seam Elbows and Angles

Standing Seam fittings work well for medium pressure applications and offer an alternative to welded elbows and angles. These are available from 8” through 60” diameters and fabricated as heavy as 16 gauge. Other diameters and throat radiuses are available.
* 42” and larger diameter 90-degree elbows are fabricated using two 45 degree angles connected with an E-Z Flange and Barrel Clamp unless otherwise specified.


Full Sweep Standing Seam Elbows

8”-30” will be a 5 gore one-piece standard throat construction. 32” and larger in diameter 90-degree full sweep (1.5 x CL) elbows are fabricated using two 45 degree angles connected with an E-Z flange and barrel clamp unless otherwise specified.



Adjustable Elbows & Angles



Welded Gored Elbows and Angles

Standard Elbows and Angles are fabricated from 20 gauge galvanized material. Other diameters, throat radiuses and gauges are available; please consult the factory for additional information.


52” and larger in diameter 90-degree full sweep (1.5 x CL) elbows are fabricated using two 45 degree angles connected with an E-Z flange and barrel clamp unless otherwise specified.


90-Degree Tee

Dimensions to be listed as follows: A, B, C
L = “C” + 4
All fittings are 1.75" from bead to end of fitting.


Tee With Reducer

Dimensions to be listed as follows: A, B, C
L = “C” + 4”
L.R. Refer to page 9
All fittings are 1.75" from bead to end of fitting.


Cross

Dimensions to be listed as follows: A, B, C, D
L = Largest of "C" or "D" + 4"
All fittings are 1.75" from bead to end of fitting.


Cross With Reducer

Dimensions to be listed as follows: A, B, C, D
L = Largest of "C" or "D" + 4"
L.R. Refer to page 9
All fittings are 1.75" from bead to end of fitting.




Conical Tee

Dimensions to be listed as follows: A, B, C
L = C + 5"
All fittings are 1.75" from bead to end of fitting.




Conical Tee with Reducer

Dimensions to be listed as follows: A, B, C
L = C + 5"
L.R. Refer to page 9
All fittings are 1.75" from bead to end of fitting.




Conical Cross

Dimensions to be listed as following A, B, C, D
L = Larger of "C" or "D" + 5"
All fittings are 1.75" from bead to end of fitting.




Conical Cross With Reducer

Dimensions to be listed as following A, B, C, D
L = Larger of "C" or "D" + 5"
L.R.: Refer to page 9
All fittings are 1.75" from bead to end of fitting.


High-Efficiency Takeoffs

Our High-Efficiency Takeoff is designed with a rectangular opening and an approximate 45° slope on the body. A flange is turned out on all four sides. The flange also has pre-punched holes for easy installation. There is a closed cell neoprene gasket (3/4” X 1/4”) applied to the flange to assure a tight seal.
High-Efficiency Takeoffs are fabricated from both 26 and 24 gauge galvanized steel. These fittings can come with or without volume dampers. The adjustable dampers are assembled using a spring-loaded retractable bearing and positive locking hardware. Test data is available; contact us for more information.

Wire Rope Hangers

CL18

The CL18 Cable Lock is for use with 3/32” or 1/8” wire rope. These size wire ropes are available in 500 foot rolls. Depending upon the wire rope utilized, the CL18 has a working load limit of up to 225 lbs. Wire Rope 3/32” 25 - 150 lbs Wire Rope 1/8” 25-225 lbs

CL23

The Maximum Load Range for each size wire rope incorporates a design safety factor of 5.1. The CL23 and wire rope combination should be sized for the job so that the projected load falls within the appropriate working load limit (WLL). Wire Rope 1/8” 25-225 lbs

KV12 Bracket Assembly

The KV12 bracket assembly enhances the suspension system by the addition of an integral bracket, which fastens the cable lock to the duck with sheet metal screws. The KV12 Bracket Assembly and CL12 have a working load limit of up to 150 lbs.
Bracket Assembly with CL12 100 per box

Companion Angle Ring Size Chart



Full Blast Gates




Fixed Pattern Diffusers



Round Ceiling Diffuser With Butterfly Damper

Available in sizes 6" - 14"



Skyblasts

Semi-circular flaps (butterfly damper) cover the exhaust stack when the fan is off. When the fan is on, flaps are forced out of the way to provide a clear path for air movement. A built-in gutter system is designed to prevent rain and snow from entering the stack. Made from galvanized spiral pipe for strength and durability; available in most sizes. Preassembled for immediate installation.
*Fabricated from Hammerlock pipe



Floor Sweeps

Floor sweeps are manufactured from 20 gauge galvanized steel for strength and rigidity. A continuous piano hinge connects the door to the fitting. Available in 6" standard. Other sizes can be fabricated.



Access Doors


Spiral Pipe Catalog & Specs

Want More Information About SMC and its Spiral Duct Fittings?

Founded in 1969, SMC is a yellow label union shop with state-of-the-art facilities in Minnesota and Illinois that produce high-quality, high-performance HVAC parts and systems, which include spiral pipe and HVAC fittings for commercial and industrial application. View our Spiral Pipe Catalog & Specs, or contact us for additional information.