# PIEE #W911S226U4509

Procurement of Dual-Wall Insulated Aluminum Spiral Duct System and Accessories for McAlester Army Ammunition Plant

**Buyer:** MICC-Ft Drum
**Posted:** September 21, 2026
**Respond By:** September 24, 2026
**Identifier:** W911S226U4509
**NAICS:** 332322, 423330, 423390

This procurement opportunity from the U.S. Army (W6QM MICC-FT DRUM) seeks a dual-wall insulated aluminum spiral duct system for the McAlester Army Ammunition Plant in Oklahoma.
- Government Buyer:
  - U.S. Army, W6QM MICC-FT DRUM contracting office
  - Installation: McAlester Army Ammunition Plant, Oklahoma
- Products Requested:
  - Dual-wall insulated spiral duct pipe (part number 39230, 140 feet)
  - 90-degree elbows (3923090, 4 units)
  - 45-degree elbows (3923045, 2 units)
  - Reducing lateral cross fitting (3012523, 1 unit)
  - Flange system for main pipe (302406, 41 units)
  - Clamps for connections (34241, 21 units)
  - Flange for 28-inch port (286G, 1 unit)
  - Flange for 12-inch ports (126G, 2 units)
- OEMs and Vendors:
  - No specific OEMs named; brand name or equal clause allows equivalent products
- Unique Requirements:
  - All components must be aluminum, with fiberglass insulation where specified
  - Factory-installed features required for flanges and clamps
  - Material Safety Data Sheet (MSDS) must be submitted with offers
  - Detailed construction and installation specifications provided
- Notable Details:
  - Brand name or equal clause permits alternative manufacturers
  - All items must meet precise technical and installation standards

### Description

amended to reduce days due to cut off.  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

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