0507_A_DISTILLER_CLEANING_INSPECTION_AND_MAINTENANCE.doc

USNS CARL BRASHEAR

(T-AKE 7)

MACHINERY, AUXILIARY SYSTEMS

N32205-18-R-4260

29 JANURARY 2018

ITEM NO. 0507

Category “A”

MSC/PM6/OAM

DISTILLERS CLEANING, INSPECTION, AND MAINTENANCE

1.0 ABSTRACT

1.1 This item describes the requirement to clean, inspect,repair and re-gasket one (1) Aqua-Chem Distiller Unit.

2.0 REFERENCES

2.1 NAVSEA DWG No. 256-7488724 Rev -, Central Seawater Cooling System Diagram.

2.2 NAVSEA Dwg No. 532-8498985 Rev - (NASSCO Dwg 471-342-7108, Diesel Gen High Temp Freshwater Cooling System Diagram.

2.3 Tech Manual T9531-AU-MMC-010, Distillers, Aqua Chem Model Number. SPD35-53TPD, Serial Number: SP06-19327.

3.0 ITEM LOCATION/DESCRIPTION

3.1 Location/Quantity:

3.1.1 Location:

-Main Machinery Space (5-66-0), 4th Deck, Frames 66 to 68

3.1.2 Quantity:

-One(1) Aqua Chem Inc Distillers

3.2 Item Description/Manufacturer’s Data:

3.2.1 Distiller

MFR ID-SPD35-53TPD

LAPL-08M001

TYPE-SPD 35

CAPACITY-53 M3/24H

SALT CONTENT-0-5PPMC1

E-CONSUMPTION IN OPERATION-24.5 KW

3.2.2 Bill of Materials: (Contractor Supplied):

a. Gasket Set 032-11074-00 (2)

b. Gasket Set 032-11073-00 (2)

c. 255-08126-000 Plate, Nozzle Assembly – Model C-Cert

d. Quantities are considered estimates. The Contractor shall provide the exact quantities and additional material such as miscellaneous pipe fittings, elbows, caps valves, pipe hangers, weld material, cable hangers, cable tags, buswork, etc., which are not included in the List of Materials in order to install a fully functional system which meets the requirements of this specification.

e. All components and piping shall be rated for use in the Central Seawater Cooling System as follows:

1. -Operating Temperature : 90(C min.

2. -Operating Pressure: 6.0 bar max

3. -ABS Class III Piping System

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES: None

5.0 NOTES

5.1 The contractor and all subcontractors regardless of tier shall 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 GTRs including but not limited to GTRs 1 through 7 and 23.

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.

5.3 This ship contains High Voltage (HV) electrical systems. The contractor and subcontractors shall obey all posted and verbal instructions regarding safety and exclusion from High Voltage areas. At no time shall a contractor or subcontractor approach, work on, or enter a High Voltage area with out proper authorization.

5.4 THE USNS TAKE CLASS ELECTRICAL COLOR CODING DOES NOT FOLLOW CONSISTENT COLOR SCHEME. THE SHIP IS KNOWN TO HAVE CURRENT CARRYING CONDUCTORS COLORED GREEN, BLUE, BLACK AND WHITE. THE CONTRACTOR SHALL ASSUME ALL ELECTRICAL CABLES ARE ENERGIZED UNTIL TESTED OTHERWISE. THE CONTRACTOR SHALL TEST ALL ELECTRICAL CABLES TO ENSURE THEY ARE DE-ENERGIZED PRIOR TO WORKING ON THE ITEM.

6.0 QUALITY ASSURANCE REQUIREMENTS: None additional.

7.0 STATEMENT OF WORK REQUIRED

7.1 Isolate, tag out and, secure the Salt Water Cooling and HT Fresh Water Cooling systems.

7.2 Drain both the HTFW and SW side of the distiller. Dispose of HTFW in accordance with all Federal, State, and local requirements. HTFW is considered HAZMAT and shall be disposed of in accordance with work item “023 HAZARDOUS WASTE MANAGEMENT AND DISPOSAL”.

7.3 OEM certified plate heat exchanger repair facility to perform the work as delineated below and to provide inspection reports detailing the cleaning methods used and results of dye penetrant testing on heat exchanger plates.

7.4 Provide round trip shipping to reconditioning facility for 152 heat exchanger plates (84 condenser plates, 68 evaporator plates-One Distiller). One (1) unit to be worked. For estimating purposes assume 25% plate replacement. Provide reusable Shipping Crate(s) for Plate Packs, turn over to ship’s force at end of availability.

7.5 Remove old gaskets and residual adhesive from each of the 152 plates and chemically clean to remove all deposits.

7.6 Visually inspect all 152 plates for rolled gasket grooves and other damage to determine suitability for re-use.

7.7 Dye penetrant test each of the 152 plates for fractures/pinhole leaks.

7.8 Re-gasket using NBR gaskets.

Note: Gaskets must be installed per O.E.M. technical manual drawings 389-10323 (evaporator) and 389-10322 (condenser) Contracted facility must use O.E.M. recommended adhesive for securing the gaskets to the heat exchanger plates.

7.9 Return cleaned, inspected, tested and regasketed plates to ship for installation.

7.10 Provide documentation certifying completion of work performed as described above.

7.11 Reassemble distiller units using Reference 2.1.3 as guidance.

7.12 Replace Nozzle Plate on Distiller #2 with CFM.

7.12.1 Provide industrial support (welding, rigging, pipe fitting, electrical, mechanical) to remove old Nozzle plate and install with new.

7.12.2 Replace shell with new gasket.

7.13 Preparation of Drawings/Documents:

Provide Service Report of work and repairs accomplished on distilling unit. Provide pictures of plate cleaning, testing, disassembly and re-assembly of unit. Provide recommended next service.

7.14 Inspection/Testing:

Perform operational check at system pressure on both distiller units. Inspect for leakage. No leakage is allowed. MSCREP to witness testing.

7.15 Painting:

Scale prime and paint and insulate all new and disturbed areas to match the surrounding areas.

7.16 Marking: None

7.17 Manufacturer's Representative:

7.17.1 Provide a OEM Technical Representative to be present during the removal, installation, and distiller commissioning.

7.17.2 OEM to provide 8 hours of training to crew on operation and maintenance of distiller.

7.17.3 Recommended Source:

AQUA CHEM INC.

WATER TECHNOLOGIES DIVISION

3001 E. JOHN SEVIER HWY.

KNOXVILLE, TENNESSEE 37914

PARTS: (414) 359-0600

SERVICE: (865) 544-2065

8.0 GENERAL REQUIREMENTS: None additional.

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