SOW_USNS_ARTIC_Stern_Tube_4300.docx

1.0 ABSTRACT:

1.1 This item provides additional construction details to be adhered during the fabrication of propulsion shaft bearing liners for the USNS ARCTIC.

2.0 REFERENCES:

2.1 References:

2.1.1 NAVSEA Drawing No. 6360793H, Propeller Shaft Details.

2.1.2 NAVSEA Drawing No. 6360794H, Stern Tube and Intermediate Shaft Details.

3.0 ITEM LOCATION / DESCRIPTION:

3.1 Location: Contractors Facility.

3.2 Description:

Propeller Shaft Forward Bearing Liner:

Material: 70-30 Cu. Ni Length: 11 feet, 9 inches.

Propeller Shaft Aft Bearing Liner:

Material: 70-30 Cu. Ni Length: 9 feet, 5 inches.

Stern Tube Shaft Aft Bearing Liner:

Material: 70-30 Cu. Ni Length: 8 feet, 3 inches.

Stern Tube Shaft Fwd Seal Sleeve:

Material: 70-30 Cu. Ni Length: 3 feet, 10 inches.

4.0 GOVERNMENT FURNISHED EQUIPMENT/ MATERIAL: None

5.0 NOTES: None

6.0 QUALITY ASSURANCE REQUIREMENTS:

6.1 ABS shall witness testing and measurement, sleeves are to be shipped with 2 copies of certifying documents in the box and two copies affixed to the outside of the container. A separate copy of all certifications shall be e-mailed to john.bolan@navy.mil. Documents shall include ABS certification statement and documentation showing all drawing requirements per Dwg 6360793 and 6360794.

7.0 STATEMENT OF WORK REQUIRED:

7.1 The contractor shall provide all materials required to fabricate one (each) of pieces B & C, listed on Ref 2.1 Material List.

7.2 The material shall be in accordance with ABS and Ref 2.1.

7.3 All materials to be certified dimensionally and for physical characteristics. A minimum of 0.250 inches of excess material shall be left on the OD and ID to allow for field fitting.

7.4 The pieces shall have an additional 4 inches added to overall length.

7.5 The liners (2) shall be hydro static tested for ABS to 50 PSIG. Documentation of test results, with ABS signature shall be submitted to USNS Arctic Port Engineer separately, as well as included with the final deliverable documentation with the liner crates.

7.6 The liners shall be dye penetrant testing, for ABS, and ABS Rules for Steel Castings 2-A6-2 Table 1 will be the acceptance criteria.

7.7 The contractor shall notify the Port Engineer when ABS check points will be held.

7.8 The contractor shall crate liners for final shipping. The contractor may consider shipping the liners in the vertical position to prevent liner sag.

7.9 The contractor shall deliver finished liners to:

MSC W143 Warehouse 1968 Gilbert Street BLDG W-143 - Doorway 10

NAVAL STATION NORFOLK

Virginia, 23511 Attn: USNS Arctic

8.0 GENERAL REQUIREMENTS: None

USNS ARCTIC

(T-AOE 8)

10 January, 2017 MSC/PM6/JEB

PROPULSION SHAFT BEARING LINER FABRICATION