Salient Characteristics Specification: Modular Stainless Steel Ductwork SystemDocument Control Number: SC-DUCT-SS-001Subject: Modular Clamp Together and Flanged Stainless Steel Ducting and ComponentsBasis of Design: KB Duct (CECO Environmental) or Approved Equal1. Scope and PurposeThis document lists the basic physical and operational features needed for industrial grade stainless steel ducting. These parts make up a complete dust, mist, and fume collection system. The modular design allows fast setup, easy layout changes, leak resistance, and corrosion protection. When specific part numbers from KB Duct are referenced, they show the required design standard, build quality, dimensions, and performance. Any substitute items offered must match or exceed these key requirements.1. General System RequirementsAll supplied components must meet the following general standards:Material: All duct pipes, branch pieces, elbows, reducers, sleeves, and hangers must be made from commercial grade Stainless Steel (minimum Grade 304 with mill finish or 2B finish; Grade 316 is also acceptable).Connection Types:Clamp Together (Rolled Edge): Standard straight pipes, branch fittings, reducers, and elbows must have a rolled lip edge on each end. This allows quick connection clamps to join parts together without needing field welding, rivets, or sheet metal screws.Flanged Ends: Select large diameter parts (28 inch duct, branch fittings, and adapter ends) must have factory welded angle or flat flanges with standard bolt holes.Pipe Seams: Straight pipe lengths and fabricated bodies must have smooth, solid, airtight welded seams to stop leaks and keep dust from building up inside.Gasket Materials: Clamps must include chemical and oil resistant Buna-N (Nitrile) seals rated for standard industrial air temperatures. Flanged 28 inch joints must include Neoprene full face or ring gaskets with pre-punched bolt holes matching the flanges.Adjustability: The system must allow quick length adjustments in the field using sliding sleeves and clamping adapters without cutting or damaging permanent pipe sections.1. Item List and Key FeaturesItem 01Reference Part Number: CUSTOMDescription: 28 Inch Stainless Steel Duct (Flanged)Quantity: 20Unit: FTKey Requirements: Nominal 28 inch inside diameter. Shipped as four separate 5 foot flanged pipe sections. Heavy gauge stainless steel. Factory welded companion flanges on both ends with standard bolt holes. Solid airtight longitudinal seam.Item 02Reference Part Number: CUSTOMDescription: 28 Inch 45 Degree Double Lateral Branch (Flanged)Quantity: 1Unit: EAKey Requirements: All-welded stainless steel construction. Dimensions: main inlet 28 inches by main outlet 24 inches by branch one 12 inches by branch two 12 inches. 45 degree lateral branch angles for smooth airflow. Flanged ends matching the 28 inch duct interface.Item 03Reference Part Number: CUSTOMDescription: 28 Inch Forever Clamps and GasketsQuantity: 4Unit: EAKey Requirements: Heavy duty stainless steel clamp built for 28 inch connections. Fitted with a Buna-N rubber gasket. Includes companion Neoprene flange gaskets punched with holes matching the 28 inch flange.Item 04Reference Part Number: 10024SSDescription: 24 Inch Stainless Steel Duct, 5 Feet LongQuantity: 3Unit: EAKey Requirements: Nominal 24 inch inside diameter, 5 feet long. Stainless steel body with rolled lips on both ends. Continuous solid welded seam.Item 05Reference Part Number: CUSTOMDescription: 24 Inch 45 Degree Double Lateral BranchQuantity: 1Unit: EAKey Requirements: All-welded stainless steel modular branch fitting. Dimensions: 24 inch inlet by 18 inch outlet by dual 12 inch branch taps. Rolled lips on all 4 connection ends. 45 degree entry angle on both 12 inch branch ports.Item 06Reference Part Number: CUSTOMDescription: 24 Inch 45 Degree Lateral BranchQuantity: 1Unit: EAKey Requirements: All-welded stainless steel single branch fitting. Dimensions: 24 inch inlet by 24 inch straight run by 12 inch branch tap. Rolled lips on all 3 connection ends. 45 degree branch angle for low air resistance.Item 07Reference Part Number: 11024SSDescription: 24 Inch Adjustable Sleeve (11 Inch Length)Quantity: 1Unit: EAKey Requirements: Sliding sleeve mechanism sized for 24 inch duct. 11 inches overall length. Stainless steel; slides over straight pipe for telescoping fit without field welding. Clamps tightly using standard modular clamps and sealing rings.Item 08Reference Part Number: 13024SSDescription: 24 Inch Forever ClampQuantity: 1Unit: EAKey Requirements: Modular duct clamp for 24 inch rolled lip pipe. Stainless steel band, hinge pin, and latch. Fitted Buna-N gasket for an airtight perimeter seal. Quick latching mechanism.Item 09Reference Part Number: 17024SSDescription: 24 Inch Saddle HangerQuantity: 2Unit: EAKey Requirements: Hat style support hanger shaped for 24 inch outside diameter duct. Heavy gauge stainless steel. Pre-punched mounting holes for threaded support rods.Item 10Reference Part Number: 10018SSDescription: 18 Inch Stainless Steel Duct, 5 Feet LongQuantity: 2Unit: EAKey Requirements: Nominal 18 inch inside diameter, 5 feet long. Rolled lip ends with continuous welded longitudinal seam. Sturdy stainless steel build.Item 11Reference Part Number: CUSTOMDescription: 18 Inch 45 Degree Double Lateral BranchQuantity: 1Unit: EAKey Requirements: All-welded stainless steel branch fitting. Dimensions: 18 inch inlet by 16 inch outlet by dual 12 inch branch taps. Rolled lip modular connections on all ports. 45 degree lateral branch takeoff angles.Item 12Reference Part Number: 11018SSDescription: 18 Inch Adjustable Sleeve (11 Inch Length)Quantity: 1Unit: EAKey Requirements: Telescoping sleeve sized for 18 inch duct, 11 inches long. Stainless steel; provides easy length adjustment. Matches 18 inch rolled lip clamp fittings.Item 13Reference Part Number: 13018SSDescription: 18 Inch Forever ClampQuantity: 4Unit: EAKey Requirements: Quick clamping ring for 18 inch rolled lip duct. Stainless steel construction with Buna-N seal. Toggle latch with safety locking pin.Item 14Reference Part Number: 17018SSDescription: 18 Inch Saddle HangerQuantity: 2Unit: EAKey Requirements: Hat style support hanger shaped for 18 inch duct exterior. Stainless steel; cradles duct without crushing or bending the pipe wall.Item 15Reference Part Number: 10016SSDescription: 16 Inch Stainless Steel Duct, 5 Feet LongQuantity: 2Unit: EAKey Requirements: Nominal 16 inch inside diameter, 5 feet long. Rolled lip ends on both sides with solid welded seam. Corrosion resistant stainless steel.Item 16Reference Part Number: 11016SSDescription: 16 Inch Adjustable Sleeve (11 Inch Length)Quantity: 1Unit: EAKey Requirements: Sliding sleeve for 16 inch duct, 11 inches long. Allows telescoping length adjustment; rolled lip on the receiver end. Stainless steel construction.Item 17Reference Part Number: 14216.45SSDescription: 16 Inch by 12 Inch by 12 Inch Y BranchQuantity: 1Unit: EAKey Requirements: Symmetrical split Y-branch fitting. One 16 inch inlet splitting into two 12 inch branch outlets at 45 degree angles. All-welded stainless steel with rolled lips on all 3 ends.Item 18Reference Part Number: 13016SSDescription: 16 Inch Forever ClampQuantity: 4Unit: EAKey Requirements: Heavy duty stainless steel clamp for 16 inch rolled lip duct. Factory installed Buna-N gasket for a tight seal under suction or pressure.Item 19Reference Part Number: 17016SSDescription: 16 Inch Saddle HangerQuantity: 2Unit: EAKey Requirements: Hat style bracket shaped for 16 inch duct diameter. Stainless steel; supports pipe from ceiling or overhead channel struts.Item 20Reference Part Number: 16014SSDescription: 14 Inch to 12 Inch ReducerQuantity: 12Unit: EAKey Requirements: Smooth tapered duct reducer. Large end: 14 inch inside diameter; Small end: 12 inch inside diameter. Rolled lip ends on both ends for clamp connection. All-welded stainless steel with smooth inside transition.Item 21Reference Part Number: 13014SSDescription: 14 Inch Forever ClampQuantity: 12Unit: EAKey Requirements: Modular duct clamp for 14 inch rolled lips. Stainless steel latch and band assembly. Built-in oil resistant Buna-N gasket.Item 22Reference Part Number: 17014SSDescription: 14 Inch Saddle HangerQuantity: 16Unit: EAKey Requirements: Hat style saddle hanger sized for 14 inch duct exterior. Stainless steel; spreads weight evenly around the bottom half of the pipe.Item 23Reference Part Number: 10012SSDescription: 12 Inch Clamp Together Duct, 5 Feet LongQuantity: 30Unit: EAKey Requirements: Nominal 12 inch inside diameter, 5 feet long. Rolled lip ends on both sides. Stainless steel pipe with continuous airtight welded seam.Item 24Reference Part Number: 11012SSDescription: 12 Inch Adjustable Sleeve (11 Inch Length)Quantity: 14Unit: EAKey Requirements: Sliding sleeve sized for 12 inch duct, 11 inches long. Gives flexible length adjustability between fixed pipe runs. Stainless steel material.Item 25Reference Part Number: 12312.45SSDescription: 12 Inch Elbow (45 Degree), Pressed HalvesQuantity: 2Unit: EAKey Requirements: 45 degree directional elbow for 12 inch duct. Smooth pressed metal halves welded together along the seams for low turbulence. Rolled lip ends on both inlet and discharge.Item 26Reference Part Number: 13012SSDescription: 12 Inch Forever ClampQuantity: 50Unit: EAKey Requirements: Modular stainless steel quick-clamp for 12 inch duct. Buna-N internal gasket profile creates an airtight seal under suction or blower pressure.Item 27Reference Part Number: 17012SSDescription: 12 Inch Saddle HangerQuantity: 4Unit: EAKey Requirements: Hat style duct hanger sized for 12 inch outside pipe diameter. Stainless steel; includes top mounting tabs for threaded rods.Item 28Reference Part Number: 15112SSDescription: 12 Inch Flanged to Clamped AdapterQuantity: 2Unit: EAKey Requirements: Transition pipe piece: one end has a 12 inch rolled lip while the opposite end has a 12 inch flat flange. Welded stainless steel construction. Connects modular clamp pipe to machine hoods or fan inlet ports.1. Component Details and Specifications4.1 Straight Pipe RunsConstruction: Rolled cylindrical stainless steel pipe made from 20 gauge (for sizes 12 inch through 18 inch) or 18 gauge (for sizes 24 inch through 28 inch) Grade 304 stainless steel.Lip Edge: Uniform rolled lip turned outward at 90 degrees around the rim, providing the lip that clamps grip.Roundness: Pipe must be round and within 1/16 inch tolerance so clamps seat easily.4.2 Quick Connect ClampsDesign: Hinged stainless steel circular clamp with an inner groove shaped to wrap over mating rolled lips and compress the gasket.Latch: Heavy toggle latch with a safety bridge or locking pin to prevent accidental release from machine vibration.Gasket: Durable Buna-N rubber seated inside the clamp groove to prevent leaks of air, dust, and oil mist.4.3 Lateral Branches, Y Fittings, and ReducersBranches: All branch taps must turn out at a 45 degree angle relative to the main trunk line for smooth airflow without clogging.Reducers: Must use a gradual taper to keep air speed steady without turbulent eddies.Weld Quality: All fittings must be welded continuously. Spot welding or sealant tape is not acceptable.4.4 Sliding SleevesPurpose: A pipe section engineered to slide over standard pipe to cover short spans without cutting or rolling lips in the field.Sealing: Seals against the base pipe with a rubber seal or secondary ring clamp and ends in a standard rolled lip.4.5 Saddle HangersDesign: Hat style bracket contoured to support the lower half of the duct.Hanging: Carries pipe weight securely without denting the thin duct wall. Pre-punched for 3/8 inch or 1/2 inch threaded hanging rods.1. Quality Standards and Equal SubmissionsCompatibility: All components must fit together smoothly. Any alternative brand submitted must connect directly to standard industrial clamp-together duct lines without adapters.Finish: Clean, uniform finish free of slag, sharp edges, burrs, or zinc contamination.Shipping: Items must be palletized, crated, or wrapped to keep pipe round during shipping. Flanges must have covers over the bolt faces.
