PWS RUDDER STOCK REFURBISHMENT LC Rev C.pdf

USNS LEWIS & CLARK

(T-AKE 1)

Auxiliary Machinery Service Order. SO-21-120

23 MARCH 2021

ITEM NO. SO-21-TBD MSC/N756/SA/DGC

RUDDER STOCK REFURBISHMENT

SO-21-020-1

1.0 ABSTRACT:

1.1 This item provides Wartsila Defense Inc. support to

perform work on the ship’s rudderstock for the USNS

LEWIS & CLARK TAKE 1.

2.0 REFERENCES/ENCLOSURES:

2.1 References:

2.1.1 Bot Groningen Dwg 1.1262/1/1 A1, Rudder Project

Arrangement.

2.1.2 Bot Groningen Dwg 2.1263/3.1 A2, Rudder Stock

Machining.

3.0 ITEM LOCATION AND DESCRIPTION:

3.1 Locations/Quantity:

3.1.1 Location: USNS LEWIS & CLARK (T-AKE 1).

3.1.2 Bill of Materials (Contractor Furnished); Rudder

Stock Liner, Material: Inconel.

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIALS/SERVICES:

4.1 Government Furnished Equipment (GFE): None.

4.2 Government Furnished Material (GFM):

-Amercoat 240, Haze Gray, One (1) Gallon.

-Amercoat 240, Red Oxide, One (1) Gallon.

-Amercoat T-10, Solvent, Two (2) Gallons.

4.3 Government Furnished Services:

-PPG Protective and Marine Coatings Representative.

-Shipping services of Rudder Stock Shaft from Vigor

Marine, Portland Oregon to WARTSILA Defense.

5.0 NOTES:

5.1 Performance Period: Upon award thru 30 January 2022

5.2 Performance Location: Wartsila Facility, Chesapeake, VA.

6.0 QUALITY ASSURANCE REQUIREMENTS: None additional.

7.0 STATEMENT OF WORK:

Auxiliary Machinery Service Order. SO-21-120

23 MARCH 2021

ITEM NO. SO-21-TBD MSC/N756/SA/DGC

RUDDER STOCK REFURBISHMENT

SO-21-020-2

7.1 Provide the services of Authorized Service Reps from

Wartsila Defense Incorporated (WDI). WDI will perform the replacement of the Rudder Stock liner.

7.1.1 Work will be performed IAW Reference 2.1.1

7.2 Wartsila shall perform the following as well as work

identified in reference 2.1.2:

7.2.1 Removal of the Rudder Stock from flatbed using

two inside cranes.

7.2.2 Unpack the Rudder Stock.

7.2.3 100% Dimensional Inspections Detailed Report will follow.

7.2.4 WDI Technical over-site during the liner

replacement.

7.2.5 Lift Rudder Stock onto lathe.

7.2.6 Check Rudder Stock shaft run-outs.

7.2.7 Removal of existing liner.

7.2.8 Hone new liner to size.

7.2.9 Machine/Hone the new Rudder Stock liner to

proper size using dimensions from existing

Stock.

7.2.10 NDT (Mag Particle Test) areas once all corrosion

has been removed and no findings are noted by

ABS

7.3 Inspection/Testing:

7.3.1 Hydrostatic test:

7.3.1.1 Blank off both ends of new liner and

perform Hydrostatic test of fifty (50)psi for at least 30 minutes. No leakage allowed.

7.3.1.2 ABS and MSC shall witness.

7.4 Painting:

7.4.1 Test for chlorides in the presence of PPG

Manufacturer’s Rep. Standard to achieve is less than 20mg/m2 (2μg/cm2). If excess chlorides are identified/found, apply “Salt Away” and high

Auxiliary Machinery Service Order. SO-21-120

23 MARCH 2021

ITEM NO. SO-21-TBD MSC/N756/SA/DGC

RUDDER STOCK REFURBISHMENT

SO-21-020-3

pressure wash the interior of the stern tube to remove chloride contaminants and bacteria from the metal using 5 to 10kpsi equipment.

7.4.2 Cover bearing and sealing areas from blast

material.

7.4.3 Blast Rudder Stock to SSP-10 near white metal

finish, High-pressure wash surfaces to remove any contamination and re-check chlorides and anchor profile. Profile 3-5mil.

7.4.4 Steel temperatures shall be a minimum of 86F

degrees prior to beginning coating processes and to maintain cure times.

7.4.5 Follow all recoat and cure time as per the Paint

Rep and Product recommendations.

7.4.6 Apply 1st full coat with AMERCOAT 240 Haze Gray

to all edges, minor pits, and any other areas of the Rudder Stock requiring coating. DO NOT PAINT

LINER OR SEALING SURFACES.

7.4.7 Apply 2nd full coat with AMERCOAT 240 Red Oxide

at 8-10 mils DFT by spray, brush or roll application.

7.4.8 Quantify DFT measurements after coating is dry.

FOR best results, maintain heat of 86F steel temperature if possible and ventilation during entire curing process.

7.4.8.1 If not 86 Deg F., let it be known that

dry times will take longer to attain proper curing.

7.4.9 Perform surface finish inspection with

proflometer.

7.4.10 Machine the Contractor Furnished Inconel Rudder

Stock liner, or agreed equivalent due to time saving, to proper size using dimensions from existing Stock.

7.5 Install new liner:

7.5.1 Install and machine OD of liner to required

specified dimension.

Auxiliary Machinery Service Order. SO-21-120

23 MARCH 2021

ITEM NO. SO-21-TBD MSC/N756/SA/DGC

RUDDER STOCK REFURBISHMENT

SO-21-020-4

7.5.2 Provide a detailed inspection report for new

liner.

7.5.3 Perform surface finish inspection with

proflometer.

7.5.4 Remove all Pits on Non-Bearing areas by making

smooth (Spoon) profiles.

7.5.5 Re-package the Rudder Stock to prevent damage

from weather.

7.5.5.1 Preserve non-bearing areas as liner.

7.5.6 Notify MSC when complete to coordinate

transportation from Machine Shop.

7.6 All work to completed to the satisfaction of the

Principle Port Engineer and Type Desk of T-AKE Class

Ships.

7.7 Manufacturer’s Representative:

Wartsila Defense Incorporated

617 Koppens Way

Chesapeake, Va 23323

Phone: 757-944-0119

POC: Joe Farmer

Phone: 757-485-5275

Joseph.Farmer@wartsiladefense.com

8.0 GENERAL REQUIREMENTS: None additional.

9.0 Growth Work: For any additional growth work, please provide a

Conditions Found Report (CFR) to the Technical Point of

Contact before completing any in-scope changes.

mailto:Joseph.Farmer@wartsiladefense.com