USCGC POLAR STAR MAIN PROPULSION GENERATOR EXHAUST SYSTEM

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Contract Opportunity

Statement of Work (SOW)

-Fabrication and delivery of Exhaust Expansion Joints

1.0 Purpose

The purpose of this requirement is to procure the replacement exhaust expansion joint assemblies for the USCGC POLAR STAR Main Propulsion Generator exhaust system. This requirement is for fabrication and shipping only.

2.0 Scope

The contractor must furnish all labor, supervision, materials, equipment, tools, and incidentals necessary to fabricate and test the expansion joint assemblies identified in this SOW and in the referenced materials.

3.0 Required Quantities

The contractor must fabricate, test and deliver the following:

• Quantity 2 - 22-inch expansion joints

1. Applicable Documents

• CG Drawing - 22-inch Expansion Joint Drawing


• STM F1120 (latest) – Standard Specification for Circular metallic Bellows Type Expansion Joints for Piping Applications


• Standards of the Expansion Joint Manufacturers Association

5.0 Operating Conditions

• Normal Operating Temp: 900° F


• System Design Temp: 1200° F

6.0 General Requirements

The Contractor must fabricate the required flex assemblies in strict accordance with the applicable Government-furnished drawings and standards referenced. Any deviation must get written Government approval.

The Contractor must provide new materials only.

The Contractor must fabricate the assemblies in accordance with applicable Expansion Joint Manufacturers Association standards.

The Contractors’ quality control must conform to ASTM F1120. Bellows pressure welds shall undergo Liquid Penetrant (PT) Examination. Per the manufacturer's option allowed in ASTM F1120, a Pneumatic Leak Test may be substituted in lieu of the hydrostatic test to protect the dry internal insulation pack.

The Contractor must install a permanent metallic data plate, and a permanent directional flow arrow must be visible on the outside of the expansion joint per ASTM F1120 requirements.

The Contractor must install shipping bars to lock the assembly rigidly at the 20" face-to-face dimension during transport. Bars shall be painted a highly visible color (e.g., safety yellow) and clearly marked for their removal after installation is complete.

7.0 Technical Requirements for 22-Inch Expansion Joint

For the two 22-inch assemblies, the contractor must fabricate the assemblies in accordance with the referenced drawing package and referenced standards.

8.0 Packaging and Preservation

The contractor shall package each fabricated assembly to prevent damage, distortion, contamination, and corrosion during handling and shipment per ASTM F1120.

9.0 Deliverables

The contractor shall deliver the following:

• Quantity 2 of 22-inch multi-ply flex assemblies with liner


• Certificate of Conformance for each item

10.0 Delivery

Required delivery date: 31JUL26

Delivery address:

USCGC Polar Star

1519 Alaskan Way S

Seattle, WA 98134

Attention: LCDR Joshua Herring

Phone: 206-758-7682

11.0 Clarifications

If there is any discrepancy between this Statement of Work and the applicable drawing package, the contractor shall notify the Government and obtain clarification before proceeding.

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