0503_A_Repair_Miscellaneous_Valves_(VR12-033_VR13-016_VR14-022).docx

USNS LEWIS AND CLARK

(T-AKE 1)

REPAIR MISCELLANEOUS VALVES (VR12-033 VR13-016_VR14-022)

1.0 ABSTRACT:

1.1. This item describes refurbishing of miscellaneous valves.

2.0 REFERENCES:

2.1. MSCLANT Standard Item No. 60, Revised 2 April 1993 Repairing Miscellaneous Valves

3.0 ITEM LOCATION/DESCRIPTION: Various locations throughout the ship

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 their effect on the work items in this work package, which may be effected by the requirements of this item.

5.2. The contractor and all subcontractors, regardless of tier, are advised to review the other Work Items under this contract to determine their effect on the work required under this Work Item.

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 without proper authorization.

5.4. The USNS LEWIS AND CLARK 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 hot until tested otherwise. The contractor shall test all electrical cables to ensure they are dead prior to working on the item.

5.5. All shipboard lockout tag out procedures shall be followed by the contractor.

6.0 QUALITY ASSURANCE REQUIREMENTS: None additional

7.0 STATEMENT OF WORK REQUIRED:

7.1. Tag out the affected piping, thoroughly drain and dispose of the residual liquids in accordance with the local, state and federal regulations. Clean and gas free to ensure the bilge areas safe for hot work. Competent Marine Chemist shall certify that the area and piping are safe for hot work daily.

7.1.1. Cleanliness of the lube oil system is of the utmost importance. Open pipe must be covered immediately to prevent contamination from various sources.

7.1.2. The covers shall be strong, durable material to prevent rupture and shall be securely fastened to prevent them from being dislodged by normal rough handling. Loose-fitting covers (wood plugs or rags) are not satisfactory. A full face gasket shall be in place between the pipe flange and the cover used.

7.2. Remove all interferences including deck plates and pipe hangers as required to facilitate this repair. Open deck area shall have a safety barrier installed for the safety of ship’s crew.

7.3. Accomplish the requirements of reference 2.1 for these valves.

7.3.1. RA-V-40 (4th deck Freeze line delivery)

7.3.2. RA-V-47 (4th deck Chill line delivery)

7.3.3. RA-V-87 (4th deck Freeze line return)

7.3.4. RA-V-124 (3rd deck Freeze line delivery)

7.3.5. RA-V-145 (2nd deck Freeze line return)

7.3.6. DN 125 Mixing valve HT valve

7.3.7. DN 150 Mixing valve Chatco Valve

7.3.8. DN 200 Mixing valve LO Valve

7.3.9. Cargo Oil Valve CO-V-010

7.3.10. MDG LO Cooler inlet and outlet valves

a. WC-V-55

b. WC-V-56

c. WC-V-57

d. WC-V-58

e. WC-V-60

f. WC-V-61

7.3.11. MDG FO Cooler inlet and outlet valves

a. WC-V-63

b. WC-V-64

c. WC-V-81

d. WC-V-82

7.3.12. HTFW Seawater inlet and outlet valves

a. SW-V-19

b. SW-V-20

c. SW-V-21

d. SW-V-22

e. SW-V-31

f. SW-V-32

7.3.13. LTFW Seawater inlet and outlet valves

a. SW-V-15

b. SW-V-16

c. SW-V-25

d. SW-V-26

e. SW-V-27

f. SW-V-28

7.3.14. MDG fresh water cooling valves

a. WC-V-515

b. WC-V-517

c. WC-V-518

d. WC-V-519

e. WC-V-520

f. WC-V-522

g. WC-V-523

h. WC-V-524

i. WC-V-525

j. WC-V-527

k. WC-V-528

l. WC-V-529

m. WC-V-530

n. WC-V-532

o. WC-V-533

p. WC-V-534

7.4. Accomplish the requirements of reference 2.1 for ten additional valves.

7.4.1. For bidding purposes, contactor shall assume that, Two6 inch gate valves, Two 8 inch gate valve, two 4 inch globe valves, two 6 inch globe valves and Two 8 inch globe valve will require repair.

7.4.2. Six valves are to be assumed in Main Machinery Room or Auxiliary Machinery Room. The remaining valves are to be assumed in the other areas of the ship.

7.5. Upon reinstallation of each valve, operate the valve operator, open and closed five separate times. Valve shall open and close freely, with no binding or excess force required.

7.6. Renew lagging where old lagging was removed. Paint all new and disturbed surfaces to match surrounding surfaces.

7.7. Install name plates, notices, and markings for all new and modified systems (or areas).

7.8. Inspection/Test

7.8.1. Hydrostatically test Seawater side of fresh water cooling to 65 PSIG (valves identified as “SW-V-XX”). No leaks allowed.

7.8.2. Hydrostatically test fresh water side of fresh water cooling to 100 PSIG (valves identified as “WC-V-XX”). No leaks allowed.

7.8.3. Operationally test new piping after installation. No leaks allowed.

7.9. Manufacturer's Representative: None

7.10. Preparation of Drawings: None

8.0 GENERAL REQUIREMENTS:

8.1. Information for HT valve in 7.3.6 is as follows

MFR-FAIRBANKS MORSE ENGINE BELOIT WI

MFR DWG-M12700537

MFR ID-M12700537

LAPL-88M010

MOTOR VOLTAGE-115V, 60HZ

POSITIONING SPEED-1.2 MM/SEC

OPERATING TIME-42 SEC

POWER INPUT-52.9 VA

OPERTING FORCE-5KN

CLOSING PRESSURE-3.3 BAR

PDCN-N2AQM7

CAGE-82796

8.2. Information for CHATCO valve in 7.3.7 is as follows

MFR-FAIRBANKS MORSE ENGINE BELOIT WI

MFR DWG-M12700535

MFR ID-M12700535

LAPL-88M010

OPERATING TEMPERATURE-220C MAX

MOTOR VOLTAGE-115V, 60HZ

POSITIONING SPEED-.96 MM/SEC

OPERATING TIME-32 SEC

POWER INPUT-130.8VA

OPERATING FORCE-12KN

CLOSING PRESSURE-8.7 BAR

PDCN-N2AQM4

CAGE-82796

8.3. Information for LO valve in 7.3.8 is as follows

MFR-FAIRBANKS MORSE ENGINE BELOIT WI

MFR DWG-M12700538

MFR ID-M12700538

LAPL-88M010

OPERATING TEMPERATURE-220F

OPERATING PRESSURE-16 BAR

MOTOR VOLTAGE-115V, 60 HZ

POSITIONING SPEED-96 MM SEC

OPERATING TIME-68 SEC

POWER INPUT-130.8VA

OPERATING FORCE-12KN

CLOSING PRESSURE-3.0 BAR

PDCN-N2AQM1

CAGE-82796

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