0509_A_Cargo_JP5_Fuel_Valve_Overhaul_Amend_1.docx

USNS ARCTIC

AOE 8

MACHINERY, AUXILIARY N32205-18-R-4256

28 September 2016

ITEM NO. 509 CATEGORY “A” MSC/N756/JEB

CARGO JP5 FUEL VALVE OVERHAUL(AMEND 1)

1.0 ABSTRACT

1.1 This item describes the requirement to drain fuel, temporarily remove, overhaul and test Cargo JP5 Valves.

2.0 REFERENCES

2.1 NAVSEA Drawing 544-6360562, Cargo JP-5 System Diagram.

2.2 NAVSEA Technical Manual; S6435-M8-MMA-010; Power actuated Butterfly Valve.

3.0 ITEM LOCATION/DESCRIPTION/QUANTITY

3.1 Location: Cargo JP5 Pump Room (7-265-0-E).

3.2 Quantity/Description:

3.2.1 One (1) 20” Butterfly Valves CJPV3

4.0 GOVERNMENT FURNISHED MATERIAL/EQUIPMENT/SERVICE: None

5.0 NOTES:

5.1 The contractor and all subcontractors, regardless of tier, must consult the General Technical Requirements 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 including but not limited to GTR's 1 through 7, 22, 23, 25 and 29.

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: None Additional.

7.0 STATEMENT OF WORK REQUIRED:

7.1 With the assistance of ships force accomplish tag out of equipment identified in section 3.0

7.2 Provide labor and material to drain down the system in preparation for valve removal. Contractor to provide all labor and materials to open, contain, clean-up and dispose of fluids drained from system or the duration of work under this item. (For estimating purposes bid that 2500 gallons of JP-5 will need to drained to facilitate valve removal.)

7.3 Contractor is responsible to blank all openings during performance of work to avoid, entry of grit, dirt, water and other foreign matter. Contractor shall record electrical hook-up information for use when reinstalling valves. Piping blanks shall be installed immediately after valve removal. Piping blanks shall be installed with gaskets to prevent leakage.

7.4 Disconnect electrically and mechanically and convey valve listed in.3.0 to shop.

7.5 Remove valve actuator and disassemble valve. Match mark valve parts.

7.6 Inspect actuators and provide report to MSCREP for recommended repairs.

7.7 (CHECKPOINT): Layout valve components for inspection by MSCREP and CHENG. Following disassembly and inspection of valves, submit a report on all defective conditions found to the MSCREP.

7.8 Straighten stems to within 0.002 inch TIR. Weld build up and machine stems in way of packing glands where required to remove scoring and other damage. Polish stems to 32 RMS.

7.9 Chase and tap all threaded surfaces.

7.10 Replace with new all missing, incorrect and defective studs, nuts and fasteners with new stainless steel material.

7.11 Refurbish valves.

7.12 Dress and true gasket mating surfaces.

7.13 Assemble valve using new contractor furnished, packing, gaskets, seats, and seal rings; all seals, seats and sealing materials shall be OEM unless approved by MSCREP. Deteriorated fasteners shall be equivalent to original and suitable for the intended service.

7.14 Reinstall valve actuators and adjust to provide proper closing of valve, set mechanical, electrical stops, and over-torque stops. Mechanical and electrical stops shall be set to provide for optimum valve seating, final operating torque adjustments shall be made under operating conditions.

7.15 Return valves to ship and reinstall with new gaskets and stainless steel bolting material. Clean and refurbish mating flanges as required. Renew all damaged insulation if any.

7.16 Inspection and Test:

7.16.1 (CHECKPOINT): Hydrostatically test valves at designed test pressure and prove tight in presence of the MSCREP prior to reinstallation aboard ship. Allowable leakage: None

7.16.1.1 Apply test pressure to each side of seat and disc.

7.16.2 (CHECKPOINT): With the assistance of Ship’s Force, carry out an operational test of all disturbed systems to prove tightness of the respective equipment/system to the satisfaction of the CHENG and PPE: Allowable Leakage: None

7.17 Manufacturer's Representative:

7.17.1 Provide the services of an OEM certified Technical Representative to oversee the inspection, testing and setting of all valve/actuator units in this work item. Tech. Representative shall be present during inspection, valve/actuator installation, wiring, and testing.

7.17.2 Suggested Source:

Valve Automation Center of VA POC: Greg Hoitt Phone # 804.752.1000 10 Hill Carter Parkway Ashland, VA 23005

8.0 GENERAL REQUIREMENTS:

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