0905A_A_Cathelco_Marine_Growth_Inhibitor_Rev.doc

USNS JOHN LENTHALL

(T-AO 189)

DRYDOCKING N32205-15-R-1006

15 JAN 2010

ITEM NO. 905A CATEGORY "A" MSC/PM1CM1/REC

CATHELCO MARINE GROWTH INHIBITOR ANODES REPLACEMENT

1.0

ABSTRACT

1.1 This item describes the replacement of the anodes for the Cathelco Marine Growth Inhibitor System in the sea-chests.

2.0

REFERENCES

2.1 MSC Drawing No. 633-8194093, T-AO CLASS MARINE GROWTH INHIBITOR INSTALLATION.

3.0

ITEM LOCATION/DESCRIPTION

3.1 Location/Quantity:

3.1.1 Location: Engine Room, Lower Level (4-60-0) 3.1.2 Quantity: total of twelve (12) anodes to be dealt with 3.2 Item Description/Manufacturer’s Data:

3.2.1 Cathelco Marine Growth Inhibitor

Model No. CA 10770

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES

4.1 Material:

Qty. eight (8) - Type WVR27 Copper Anodes Qty. four (4) - Type WVR29 Cast Iron Anodes 5.0

NOTES

5.1 The contractor and all subcontractors, regardless of tier must consult the General Technical Requirements (GTR) to determine applicability to this work item. In performance of this work item, the contractor and all subcontractors regardless of tier must comply with the requirements of all applicable GTR’s.

5.2 The contractor and all subcontractors, regardless of tier are advised to review other work items under this contract to determine their effect on the work required under this work item.

6.0

QUALITY ASSURANCE REQUIREMENTS

6.1 All work performed shall be to the satisfaction of the Port Engineer, Chief Engineer and the ABS Surveyor.

7.0

STATEMENT OF WORK REQUIRED

7.1 Arrangements/Outfitting: None additional.

7.2 Structural: None additional.

7.3 Mechanical/Fluids:

7.3.1 Disconnect, rig and remove the eight (8) Copper and four (4) Cast Iron Anodes from all of engine room’s sea chest, for the sea water cooling system, two (2) copper anodes and one (1) cast iron anode per sea chest.

7.3.2 Prepare the sea-chest flanges for installation.

7.3.3 Install new GFM marine growth inhibitor sacrificial anodes in the engine room’s sea chests for the sea water cooling system, two (2) copper anodes and one (1) cast iron anode per sea chest, using reference 2.1 as guidance.

7.4 Electrical: None additional.

7.5 Electronics: None additional.

7.6 Preparation of Drawings: None additional.

7.7 Inspection/Test:

7.7.1 The OEM Representative shall perform the following testing and submit a final report to include the results of all the testing and recommendations for any future maintenance a.

Tightness Test b.

Functional/Operational Test c.

Cable Insulation Resistance Tests d.

Enclosure Ground Test

7.7.2 The OEM Representative shall make all final adjustments once the ship is out of the dry-dock and back in the water.

7.7.3 Perform a final test of the system in the presence of the ABS Surveyor, USCG Inspector, Chief Engineer, and Port Engineer.

7.8 Painting:

7.8.1 Paint all new and disturbed surfaces to match surrounding surfaces. The anode surface shall be free of paint and grease.

7.9 Marking: None additional.

7.10 Manufacturer's Representative:

7.10.1 The contractor shall provide the services of a factory authorized OEM Technical Field Service Representative for the testing and adjusting of the system after replacing anodes as per paragraph 7.7.1 – 7.7.4.

8.0 GENERAL REQUIREMENTS

8.1 None additional.

905-1