0203_A_FUEL_SETTLER_TANKS_REPAIR.doc

USNS MERCY

(T-AH 19)

MACHINERY, PROPULSION

N32205-15-R-5000

28 FEBRUARY 2014

ITEM NO. 203

Category “A”

MSC/SCHUMACHER

FUEL SETTLE TANKS REPAIRS AND VALVES REPLACEMENTS (VR15-063)

1.0

ABSTRACT:

This work item describes the steel repairs to the fuel settler tanks and the replacement of all fuel system recirculation and tank stripping valves from the tanks.

2.0

REFERENCES/ENCLOSURES:

2.1 References:

2.1.1 MSC DWG 8387470_C Periodic Safety Test Procedures

USNS Mercy (T-AH 19)

2.2 Enclosures:

3.0

ITEM LOCATION/DESCRIPTION:

3.1 Location/Quantity:

3.1.1 Location: Engine Room, 40’ Flat, Port Side. 6-95-0

3.2.1 Quantity: Port and Starboard DFM Settler Tanks 4.0

GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES:

4.1 2 each, Steel 800# 1.5” socket weld fire Safe ball valves

4.2 3 each, Steel 800# 1” socket weld fire Safe ball valves

4.3 4 each, steel 800# 1.5” socket weld flanges

4.4 6 each, steel 800# 1” socket weld flanges 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. Many of the definitions relating to performance of this work item are found in Work Item 001.

6.0

QUALITY ASSURANCE REQUIREMENTS:

6.1 All Inspections and tests shall be performed in the presence of contractor’s representative, MSFSC REP, ABS Surveyor and USCG Inspector, as applicable. Notify the MSCREP, USCG Inspector and the ABS Surveyor 24 hours prior to the scheduled inspections and tests.

7.0

STATEMENT OF WORK REQUIRED:

7.1 Contractor shall provide all labor, material, staging and equipment to accomplish this work item.

7.2 Contractor shall work with ship’s force to lock-out/tag-out the equipment identified in paragraphs 3.0 as needed. Upon completion of this work item restore systems to full operation.

7.3 Remove all interference in the way of accomplishing this

work including but not limited to deck plates, piping, hand rails, deck plate frames, lighting fixtures, labels and signs, insulation pads and blankets to facilitate removal and installation of the components. Reinstall all removed interference upon completion work.

7.4 Both tanks will be “gas free” in work item 0021. Perform 30 “UT” readings in the areas at the most port and starboard corners of the aft 40” flat from 3’ inboard to the side shell on bulkhead 129.

7.5 Provide “condition found” report to Chief Engineer and MSCREP.

7.6 Crop out corroded bulkhead and replace with new 20.4# steel plate 3 ft x 2ft both sides from shell inboard.

7.7 Remove existing recirculation and tank stripping valves. Modify piping to fit new flanges and valves. Weld new flanges in place.

7.8 Install new valves with new steel fasteners and new gaskets made for fuel systems.

7.9 Modify existing reach rod for the 2 recirculation and 3 stripping valves.

7.9 Inspection / Test

7.9.1 Hydrostatic test each tank to test bulkhead repair in accordance with ABS rules.

7.9.2 Hydrostatic test piping system to ensure now flanges and valve do not leak in accordance with ABS rules.

7.10 Painting

7.10.1 Clean, prime, and paint new and disturbed surfaces

to match the surroundings. Paint shall be provided as GFM.

8.0 GENERAL REQUIREMENTS: None.

203-1