# DOUBLE WALL INSULATED DUCTING

Canonical: https://abierto.us/opportunities/w911s226u4509

- Solicitation number: W911S226U4509
- Notice type: Combined synopsis and solicitation
- Status: Open. Offers due September 29, 2026 at 11:00 AM EDT
- Department: Department of the Army
- Agency: Department of the Army
- Contracting office: W6QM Micc-Ft Drum (W911S2)
- NAICS: 332322 Sheet Metal Work Manufacturing
- Product or service code: 4520 Space and Water Heating Equipment
- Set-aside: Total small business set-aside
- First posted: September 21, 2026
- Last posted: September 21, 2026
- SAM.gov: https://sam.gov/workspace/contract/opp/935547c9005b40848f8a202853b1e8c5/view

## Description

Salient Characteristics for the Dual-Wall Insulated Aluminum Spiral Duct System:

**1. Dual-Wall Spiral Pipe Part Code:**

**39230 Description:** Straight dual-wall, insulated spiral duct pipe.

**Inside Diameter:** 30 inches Outside Diameter: 34 inches Wall Thickness: 0.040 inches for both inner and outer walls.

**Material:** Aluminum.

**Insulation:** 2-inch thick fiberglass with a density of 1.5 lbs/cu. ft.

**Spacers:** Internal I-beam spacers every 8 inches to maintain duct separation. Quantity: 140 feet 2. 90-Degree Elbow Part Code:

**3923090 Description:** 90-degree bend for the duct system.

**Construction:** 5-piece gored elbow.

**Inside Diameter:** 30 inches Outside Diameter: 34 inches Bend Radius: 45-inch centerline radius.

**Material:** 0.040-inch aluminum.

**Insulation:** 2-inch thick fiberglass with a density of 1.5 lbs/cu. ft. Quantity:

**4 3. 45-Degree Elbow Part Code:**

**3923045 Description:** 45-degree bend for the duct system.

**Construction:** 3-piece gored elbow.

**Inside Diameter:** 30 inches Outside Diameter: 34 inches Bend Radius: 45-inch centerline radius.

**Material:** 0.040-inch aluminum.

**Insulation:** 2-inch thick fiberglass with a density of 1.5 lbs/cu. ft. Quantity:

**2 4. Reducing Lateral Cross Fitting Part Code:**

**3012523 Description:** A cross-shaped fitting that reduces the main duct size and has two branches.

**Main Inlet/Outlet:** Reduces from 30 inches to 28 inches.

**Branches:** Two 12-inch diameter branches at a 45-degree angle.

**Material:** 0.040-inch aluminum. Quantity: 1 5. Flange System for Main Pipe Part Code:

**302406 Description:** Connection system (AccuFlange) for joining the 30 x34 dual-wall pipe and elbows.

**Function:** Must be factory-installed on pipe and elbow ends for proper alignment and connection.

**Material:** Aluminum. Quantity:

**41 6. Clamp for Connections Part Code:**

**34241 Description:** 34-inch QuickDraw clamp to secure the outer flange connections.

**Sealing:** Must have a built-in self-sealing rubber gasket to ensure an airtight seal.

**Material:** Aluminum. Quantity:

**21 7. Flange for 28-inch Port Part Code:**

**286G Description:** 28-inch aluminum flange.

**Function:** Must be factory-installed on the 28-inch outlet of the reducing cross fitting. Quantity:

**1 8. Flange for 12-inch Ports Part Code:**

**126G Description:** 12-inch aluminum flange.

**Function:** Must be factory-installed on the two 12-inch branches of the reducing cross fitting. Quantity: 2

## Publications

- September 21, 2026: Combined synopsis and solicitation, due September 29, 2026 at 11:00 AM EDT. Notice 935547c9005b40848f8a202853b1e8c5. https://sam.gov/workspace/contract/opp/935547c9005b40848f8a202853b1e8c5/view

## Points of contact

- David Fortune, david.c.fortune.civ@army.mil, 9184206445

---
Source: SAM.gov Contract Opportunities bulk extract. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/w911s226u4509.