0516_A_Sea_Water_Strainer_Installations_REV-1.docx

USS MOUNT WHITNEY

(LCC-20)

SEAWATER STRAINER INSTALLATIONS

1.0 ABSTRACT

This item describes the modifications necessary for the installation of seawater strainers and associated piping. This includes structural modifications, strainer foundations, new piping, and piping modifications.

2.0 REFERENCES

2.1 MSC Drawing No. 185-8496221 USS MOUNT WHITNEY (LCC-20), ESLP SEAWATER STRAINERS, STRUCTURAL MODIFICATIONS

2.2 MSC Drawing No. 256-8496222 USS MOUNT WHITNEY (LCC-20), ESLP SEAWATER STRAINERS, PIPING MODIFICATIONS

2.3 MSC Drawing No. 436-8496223 USS MOUNT WHITNEY (LCC-20), ESLP SEAWATER STRAINERS, ALARM & MONITORING SYSTEM MODIFICATIONS

2.4 ASTM F683, “Standard Practice for Selection and Application of Thermal Insulation for Piping and Machinery”.

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 2.3 above.

3.2.2 Quantities specified in the List of Material of References 2.1 through 2.3 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 2.3.

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): Incorporation of the Sea Water Strainers Alarm & Monitoring Software Modifications into the Vessel Control System (VCS).

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 0113, 0115, 0116, 0203, and 0204 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.

5.4 The Contractor shall be notified by the MSCREP of termination points in Field Stations 15 & 16 14, 17, 18 & 19 and Connection Box 13Amend 0004 identified in Reference 2.3.

6.0 QUALITY ASSURANCE REQUIREMENTS: None additional

7.0 STATEMENT OF WORK REQUIRED

7.1 Arrangements/Outfitting: None Additional

7.2 Structural

7.2.1 Removals: None Additional

7.2.2 Relocations

a. Relocate AC Cooling Pump #5 and associated piping using Reference 2.1 as guidance.

b. Relocate AC Cooling Pump #6 and associated piping using Reference 2.1 as guidance.

7.2.3 Installations

a. Install four (4) AC Cooling Pump seawater strainer foundations using Reference 2.1 as guidance.

b. Install four (4) three (3)Amend 0002 Fire Pump Seawater Strainer foundations using Reference 2.1 as guidance.

c. Install two (2) SSTG Cooling Pump seawater strainer foundations using Reference 2.1 as guidance. Install one (1) combined AC Cooling and Fire Pump Foundation using Reference 2.1 as guidance. Amend 0002

d. Install one (1) Main Engine LO Cooler seawater strainer foundation using Reference 2.1 as guidance.

e. Modify platform grating and hand railing above New SSTG seawater strainers to allow basket removal.

f. Modify platform grating above Fire Room Fire Pump Strainer to allow removal.

g. Install three (3)one (1)Amend 0002 transducer foundation using Reference 2.1 as guidance.

7.3 Mechanical/Fluids

7.3.1 Removals

a. Remove existing AC Cooling Pump piping using Reference 2.2 as guidance.

b. Remove existing Fire Pump piping using Reference 2.2 as guidance.

c. Remove existing SSTG Cooling Pump piping using Reference 2.2 as guidance.Amend 0002

d. Remove existing Main Engine LO Cooler piping using Reference 2.2 as guidance.

7.3.1 Relocations

a. Relocate AC Cooling Pump #5 suction & discharge gauge lines, drip tray drain piping, inlet & discharge drain piping using Reference 2.2 as guidance.

b. Relocate AC Cooling Pump #6 suction & discharge gauge lines, drip tray drain piping, inlet & discharge drain piping using Reference 2.2 as guidance.

7.3.3 Installations

a. Install four (4) new AC Cooling Pump seawater strainers and piping using Reference 2.2 as guidance.

b. Install four (4) three (3)Amend 0002 new Fire Pump seawater strainers and piping using Reference 2.2 as guidance.

c. Install two (2) new SSTG Cooling Pump seawater strainers and piping using Reference 2.2 as guidance. Install one (1) new AC Cooling and Fire Pump seawater strainers and piping using Reference 2.2 as guidance.Amend 0002

d. Install one (1) new Main Engine LO Cooler seawater strainers and piping using Reference 2.2 as guidance.

e. Install Differential Pressure Transducer piping at each SSTG Cooling Pump strainer andAmend 0002 the Main Engine LO Cooler strainer using Reference 2.2 as guidance. Amend 0004

e. Install Differential Pressure Gauges with integral differential pressure switch at each seawater strainer using Reference 2.2 as guidance. Amend 0004

f. Modify existing gauge piping and install Differential Pressure Gauges with integral differential pressure switch (Qty = 3) on existing SS/EDG seawater strainers located in Assured Power Aux Machinery Room (7-109-3-E). Differential Pressure Gauges shall be mounted adjacent to existing SS/EDG Cooling Water Pumps. Differential Pressure Gauges furnished on Reference 2.2. Amend 0004

7.4 Electrical

7.4.1 Removals: None Additional

7.4.2 Modifications/Relocations

a. Temporarily disconnect all electrical cabling to AC Cooling Pump #5 motor and re-connect after pump has been relocated.

b. Temporarily disconnect all electrical cabling to AC Cooling Pump #6 motor and re-connect after pump has been relocated.

7.4.3 Installations

a. Install three (3) one (1)Amend 0002 Differential Pressure Transducers and cabling using Reference 2.3 as guidance. Cable shield of shielded cables shall be grounded at the GE Connection Box only. Amend 0004

b. Install cabling from Differential Pressure Gauges to Field Stations and Connection Boxes using Reference 2.3 as guidance. Amend 0004

c. Install cabling from SS/EDG Differential Pressure Switches located in Assured Power Aux Machinery Room (7-109-3-E) to Field Station 14 located in Assured Power UPS Room #2 (7-109-1-E). 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 Megohm (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.

7.7.5 Clean and Flush All Piping

Clean and flush all piping affected by this work item by using a service fluid or medium approved by the MSCREP.

7.7.6 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 Insulation

Install insulation and lagging on all new and modified piping install under this specification.

7.10 Markings

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

7.11 Manufacturer’s Representative

8.0 GENERAL REQUIREMENTS: None additional

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