0504_A_CHT_Cross_Connect_Tank_Installation_REV-1.docx

USS MOUNT WHITNEY

(LCC-20)

CHT CROSS CONNECT TANK INSTALLTION

1.0 ABSTRACT

This item describes the modifications necessary for the installation of the CHT Crossover Tanks and piping and related equipment. Amend 0004 This includes structural modifications, CHT piping, potable piping, and LP air.

2.0 REFERENCES

2.1 MSC Drawing No. 085-8496092 USS MOUNT WHITNEY (LCC-20), ESLP CHT LIFT STATIONS, ARRANGEMENTS & OUTFITTING

2.2 MSC Drawing No. 103-8496093 USS MOUNT WHITNEY (LCC-20), ESLP CHT LIFT STATIONS, STRUCTURAL MODIFICATIONS & INSTALLATIONS

2.3 MSC Drawing No. 320-8496094 USS MOUNT WHITNEY (LCC-20), ESLP CHT LIFT STATIONS, POWER MODIFICATIONS & INSTALLATIONS Amend 0004

2.4 MSC Drawing No. 528-8496095 USS MOUNT WHITNEY (LCC-20), ESLP CHT LIFT STATIONS, PIPING & EQUIPMENT MODIFICATIONS & INSTALLATIONS

3.0 ITEM LOCATION/DESCRIPTION

3.1 Location/Quantity

3.1.1 Location: Various

3.1.2 Quantity: None

3.2 Item Description/Manufacturer's Data

3.2.1 Material/Components, including specific quantities and manufacturer make and model numbers, necessary to accomplish work required by this work item, are included in the List of Material of References 2.1 through 2.4 above.

3.2.2 Quantities specified in the List of Material of References 2.1 through 2.4 are considered estimates. The contractor shall provide the exact quantities and additional material such as fittings, weld material, pipe hangers, etc., which are not included in the List of Material of References 2.1 through 2.4.

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES

4.1 Government Furnished Equipment (GFE): None

4.2 Government Furnished Material (GFM): Paint – As Required

4.3 Government Furnished Services (GFS): None

4.4 Government Furnished Information (GFI): None

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 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, 22, 23, 25, 28 and 29

5.2 The contractor and all subcontractors, regardless of tier are advised to review other work items under this contract including, but not limited to, work items 0119 and 0505 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 0001.

5.3 USS Mount Whitney is known to have a considerable amount of asbestos. Additionally, it is known that the coating systems may contain lead. The contractor should expect this condition and factor in removal and remediation time requirements into his overall planning schedule. Costs associated with hazardous waste remediation and removal shall be attributed to Work Item 023, rather than to the individual work items. Wastes removed in the course of work package accomplishment shall be removed from the ship, handled and disposed of in accordance with Work Item 023 of this work package. Contractor shall be responsible to follow all international, national and US Federal regulations in the containment and removal of these wastes as encountered.

6.0 QUALITY ASSURANCE REQUIREMENTS: None additional

7.0 STATEMENT OF WORK REQUIRED

7.1 Arrangements/Outfitting:

7.1.1 Removals

a. Prior to commencing any work on the CHT installation, the Shipyard shall gas free CHT Tanks 8-48-1-W & 8-48-2-W in accordance with Work Items 0020 and 0021. The tank shall be inspected for structural integrity and remain gas free until completion of all work items pertaining to the CHT Cross Connect installations.

b. Remove existing storage cages and relocate using Reference 2.1 as guidance. Amend 0004

7.1.2 Installations

a. Install one (1) Cleaning Gear Locker using Reference 2.1 as guidance.

b. Install one (1) Eyewash Station using Reference 2.1 as guidance.

c. Install one (1) Sink using Reference 2.1 as guidance.

d. Install one (1) Soap Dispenser using Reference 2.1 as guidance.

e. Install one (1) Paper Towel Dispenser using Reference 2.1 as guidance.

f. Install two (2) Emergency Escape Breathing Apparatus using Reference 2.1 as guidance.

g. Install two (2) Health Placards using Reference 2.1 as guidance.

7.2 Structural

7.2.1 Removals: None

7.2.2 Installations

a. Install CHT Crossover Tank plating and stiffeners using Reference 2.2 as guidance. Amend 0004

b. Install one (1) Eyewash Station mounting board and stiffeners using Reference 2.2 as guidance.

c. Install two (2) CHT Lift Station pump foundations using Reference 2.2 as guidance. Amend 0004

d. Install one (1) Cleaning Gear Locker foundation using Reference 2.2 as guidance.

e. Install two (2) Gauge Mounting Board and stiffeners using Reference 2.2 as guidance. Amend 0004

7.3 Mechanical/Fluids

7.3.1 Removals

a. Remove existing CHT Drain piping, port and starboard, using References 2.4 as guidance.

7.3.2 Installations

a. Install new CHT Drain piping to CHT tank and new Crossover Tank Amend 0004 using Reference 2.4 as guidance.

b. Install new CHT Cross-Over Lift Station pump Amend 0004 piping, port and starboard side, using Reference 2.4 as guidance.

c. Install new CHT Lift Station Pump Suction and Outlet pressure gauges using Reference 2.4 as guidance. Amend 0004

d. Install new CHT Crossover Tank Air Escape & Overflow piping, connecting into the existing CHT Tank Air Escape & Overflow piping using Reference 2.4 as guidance. Amend 0004

e. Install new Potable Water piping for the Eyewash Station using Reference 2.4 as guidance.

f. Install new LP Air piping, port and starboard, using Reference 2.4 as guidance.

g. Install CHT Crossover Tank float level clock gauge using Reference 2.4 as guidance. Amend 0004

h. Install drip pans below valves using Reference 2.4 as guidance.

i. Install insulation and lagging on all new and modified potable water piping.

7.4 Electrical

7.4.1 Relocations

a. Relocate lighting fixtures in way of new piping installed in 7.3. Exact locations shall be approved by the MSCREP.

7.4.2 Installations

a. Install equipment and cabling to using Reference 2.3 as guidance. Amend 0004

b. Liquid level switches, furnished on Reference 2.3, shall be mounted in accordance with the manufacturer’s instructions such that the float is free from obstruction. “Low” level switches shall be mounted at 10% tank capacity. “High” level switches shall be mounted at 85% tank capacity. In each tank, the “High” level switch shall be mounted on the aft end of the tank so that it will not interfere with the “Low” level switch. Amend 0004

7.5 Electronics: None Additional

7.6 Preparation of Drawings: None Additional

7.7 Inspection/Test

7.7.1 Preliminary Tests

Contractor shall conduct preliminary tests on all completed work before calling for an official test.

7.7.2 Welding Test

Visually test new, modified, or repaired welds in accordance with ABS rules. All results of the weld inspection to be reviewed for approval by MSCREP and ABS surveyor.

7.7.3 Cable Insulation Resistance Test

Perform an end to end continuity and electrical insulation resistance test on new, modified, overhauled, or repaired system cables in accordance with Institute for Electrical and Electronic Engineers (IEEE) Standard 45, Recommended Practice for Electric Installations on Shipboard. Notify the MSCREP immediately if insulation values of equipment or cable are less than 1 Megaohm (MΩ).

7.7.4 Enclosure Ground Test

Test new, modified, overhauled, or repaired electronic equipment enclosures for continuity and resistance of the grounding path. The resistance of the grounding path between the equipment enclosure and a ship structural member shall not exceed 0.1 ohm (Ω).

7.7.5 Clean and Flush All Piping

Clean and flush all piping affected by this work item by using fresh water.

7.7.6 Hydrostatic Testing

Hydrostatically test all new and modified piping for 30 minutes at 150% of the design pressures. No leaks are permitted. After satisfactory completion of hydrostatic and tightness tests, the systems shall be tested for proper operation and unobstructed flow. Visually inspect welded, brazed, and new mechanical joints for leaks.

7.7.7 Structural Tightness Test

New, repaired, and modified ship’s structures designated as watertight shall be tested to ensure tightness. Verify that all structural work including any structural attachments, which would affect the tightness of the structure, is complete and ready for service. Structural integrity and tightness shall be considered satisfactory if no bubbles develop in the leak indicator solution.

7.7.8 Completion Test

7.7.9 Operational Test

7.8 Painting

Paint all new and modified surfaces to match surrounding surfaces.

7.9 Markings

Install name plates, notices, and markings for all new and modified systems in accordance with GTR No. 29.

7.10 Manufacturer’s Representative: None additional

8.0 GENERAL REQUIREMENTS: None additional

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