Revised_Work_item_08_CondensorSeawaterRegulatingValveRenew.pdf

52010_JAH_0514_752

Work item 08: Condenser Seawater Regulating Valve, Renew

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to renew Condenser Seawater Regulating valves listed in Table 1.

TABLE 1 – VALVE DESIGNATED FOR RENEWAL

DESCRIPTION LOCATION/VALVE NO CONNECTION

Condenser Seawater Regulating Valve, 3 ips No. 1 A/C

Unit: Condenser (A)

AC EQPT RM, 3-22-0-Q

(STBD)/SW1A-V-032

Flanges (3) Tubing (2)

Condenser Seawater Regulating Valve, 3 ips, No. 1 A/C Unit Condenser (B)

AC EQPT RM, 3-22-0-Q

(STBD)/SW1B-V-032

Flanges (3) Tubing (2)

Condenser Seawater Regulating Valve , 3 ips No. 2 A/C Unit: Condenser (A)

AC EQPT RM, 3-22-0-Q

(PORT)/SW2A-V-032

Flanges (3) Tubing (2)

Condenser Seawater Regulating Valve, 3 ips No. 2 A/C Unit Condenser (B)

AC EQPT RM, 3-22-0-Q

(PORT)/SW2B-V-032

Flanges (3) Tubing (2)

Condenser Seawater Regulating Valve , 3 ips No. 3 A/C Unit: Condenser (A)

AC EQPT RM, 3-22-0-Q

(PORT)/SW3A-V-032

Flanges (3) Tubing (2)

Condenser Seawater Regulating Valve, 3 ips No. 3 A/C Unit Condenser (B)

AC EQPT RM, 3-22-0-Q

(PORT)/SW3B-V-032

Flanges (3) Tubing (2)

1.2 Government-furnished property.

MTI ITEM DESCRIPTION NSN/PN QTY* ESTIMATED

COST ($/UNIT)

6 Condenser Seawater Regulator Valve, 3 ips with Monel internals with Bronze body and bonnet per ASTM

B62

MDFPM-3120-3W-TB 6 15000

2. REFERENCES

COAST GUARD DRAWINGS

Coast Guard Drawing 750-WMSL 501-005, Rev D; Machinery Arrangement Coast Guard Drawing 750 WMSL 516-001, Rev D; A/C & Refrigeration Piping Diagram Coast Guard Drawing 750 WMSL 516-006, Rev C; Chilled Water & Refrigeration Piping Unit

Coast Guard Drawing 750 WMSL 520-001, Rev F; Seawater Cooling System Diagram Coast Guard Drawing 750 WMSL 520-004, Rev B; Salt Water Cooling Unit 1320 Coast Guard Drawing 750-WMSL 508-1, Rev C, Piping and Machinery Insulation Schedule and

L/M (ASC508001)

COAST GUARD PUBLICATIONS

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2012, General Requirements Surface Forces Logistics Center Standard Specification 0740 (SFLC Std Spec 0740), 2012, Welding and Allied Processes Surface Forces Logistics Center Standard Specification 6310 (SFLC Std Spec 6310), 2012, Requirements for Preservation of Ship Structures Coast Guard Technical Publication S9514-F1-MMA-010, A/C Plant HFC 134A 130 Ton

Capacity Description Operation and Maintenance, 15 Jan 2012

OTHER REFERENCES

ASTM International (ASTM) F992, 2006, Standard Specification for Valve Label Plates MIL-PRF-1149, Jun 1998, Gasket Materials, Synthetic Rubber, 50 and 65 Durometer Hardness MIL-R-21252, May 1991, Rubber Sheet, Solid, Synthetic, Shipboard Water Evaporator

Gasketing NAVSEA Drawing 804-5959214, Rev-, Piping Insulation - Installation Details

3. REQUIREMENTS

3.1 General.

3.1.1 CIR.

None.

3.1.2 Tech Rep.

None.

3.1.3 Protective measures. The Contractor shall protect components, spaces, and equipment in accordance with SFLC Standard Specification 0000 paragraph 3.3.3 (Vessel component, space and equipment protection.

3.1.4 Interferences. The Contractor shall be aware that interferences in way of work include, but are not limited to the below-listed. Handle all interferences in accordance with SFLC Std Spec 0000, paragraph 3.3.5 (Interferences):

• Piping.

• Insulation.

• Valve flanges.

3.1.5 Provide blank flanges for each side of each valve being removed. When a valve is removed, immediately install ¼ Inch thick steel blank flanges and 1/8 Inch rubber gaskets. Each blank flange must be held in place by a minimum of 4 bolts.

3.1.6 The Contractor shall coordinate with the Coast Guard Inspector at least one day prior to working on this item. The Contractor shall be responsible for capturing all liquids still remaining in the piping systems (after systems are tagged out) and properly discarding of the liquid.

3.1.7 The Contractor shall perform work on renewing Condenser Seawater Regulating Valve of one Air Conditioning plant at a time.

3.1.8 Condenser Seawater Regulating Valve Datasheet is shown in the Figure 1 for reference.

3.1.9 Operational test - initial. Prior to commencement of work, the Contractor shall witness Coast Guard personnel perform an initial operational test of all items or shipboard devices to be disturbed, used, repaired, or altered, to demonstrate existing operational condition. Submit a CFR.

3.1.10 After completion of this item, the Contractor shall perform AC System Groom as per WORK ITEM : Air Conditioning Plants, System Groom.

3.2 Fluid handling. The Contractor shall drain and dispose of all residual fluids in the piping system in accordance with all Federal, state, and local rules and regulations.

3.3 Valve removal. Close appropriate isolation valves to isolate seawater from designated condenser seawater regulator valve listed in the Table 1. Immediately after valve removal, install blank flanges, caps, plugs and gaskets, as applicable, over all openings while securing each flange with at least two bolts, 180 degrees apart.

3.4 Valve renewal. The Contractor shall disconnect and renew valve listed in the Table 1. Use Government-Furnished valves for renewal. Install valves in accordance with the manufacture’s instruction and following Items:

• Coast Guard Drawing 750-WMSL-501-005

• Coast Guard Drawing 750-WMSL-516-001

• Coast Guard Drawing 750-WMSL-516-006

• Coast Guard Drawing 750-WMSL-520-001

• Coast Guard Drawing 750-WMSL-520-004

• Coast Guard Tech Pub S9514-F1-MMA-010.

3.5 Gasket. Renew all flange gaskets. Gasket material for flanges shall be synthetic rubber sheet per MIL-PRF-1149 or MIL-R-21252; or man-made non-asbestos compressed fiber gaskets. If compressed fiber gaskets are to be used, known complying products include Garlock 3400, Chesterton 195, Accord 533N, and John Crane 2160.

3.6 Reinstallation/installation. Upon completion of all authorized work, the Contractor shall accomplish the following:

• Remove and dispose of all blank flanges, caps, plugs and associated seals/gaskets.

• Reinstall new regulator valves with new seals/gaskets.

• Renew all missing or damaged regulator valve Label Plates.

• When necessary renew damaged bolting hardware.

3.7 Valve labeling. The Contractor shall install valve Label Plates on valves in accordance with

ASTM F992.

3.8 Leak test. After all authorized repairs of mechanical (i.e. threaded, bolted, etc.) joints, the Contractor shall perform an operational test on Condenser Seawater Regulating Valve using the system fluid at normal operating pressure. Be aware that no visible leakage or deformation is acceptable. Repair all leaks and discrepancies found. Submit a CFR.

3.9 Operational Test – Post Repairs. After completion of work, the Contractor shall, in the presence of Coast Guard Inspector thoroughly test and prove all items or shipboard devices that have been disturbed, used, repaired, altered, or installed to be in satisfactory operating condition.

Submit a CFR.

3.10 New insulation installation. Install new insulation material over the exposed valves, fittings, and flanges, in accordance with details in Coast Guard Drawing 750-WMSL-508-1 and NAVSEA Drawing 804-5959214; select appropriate insulation materials and thicknesses for the application and temperature ranges specified in ASTM F683, Tables S1.1, S1.2, and S1.4. Paint the newly installed insulation system, in accordance with SFLC Std Spec 6310, using the system specified for “Insulation Surfaces, Fiberglass Sheet/Closed Cell PVC Foam” in Appendix B (Cutter and Boat Interior Paint Systems).

3.11 Touch-up Preservation. The Contractor shall prepare and touch up coat all disturbed surfaces to match existing adjacent areas, in accordance with SFLC Std Spec 6310, Appendix B (Cutter and Boat Interior Painting Systems). Abide by all touch-up requirements outlined in SFLC Std Spec 0000, Appendix A(Requirements for Preservation of Ship Structures).

4. NOTES

This section is not applicable to this work item.

FIGURE 1: CATALOG DATA SHEET OF CONDENSER SEAWATER REGULATING VALVE