Attachment_1_to_Amendment_0001_-_Revised_Specifications_for_Work_Item_20.doc

TCTO_LLNNNN_52000_JSP_0816_752

WORK ITEM 20: Auxiliary Seawater Piping, Modify

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to modify the Auxiliary Sea Water (ASW) Piping listed in the Table 1.

TABLE 1 – list of sea water piping

1.2 Government-furnished property.

None

2. REFERENCES

Coast Guard Drawings

Coast Guard Drawing 750-WMSL-801-004, Rev A, Booklet of General Plans NSC 3 SRD (ASC801001C)

Coast Guard Drawing 750-WMSL-100-060, Rev C, General Arrangement NSC 3 Only (AS3100001) Coast Guard Drawing 750-WMSL-520-001, Rev H, Seawater Cooling System Diagram (ASC520001)

Coast Guard Drawing 750-WMSL-520-004, Rev E, Salt Water Cooling Unit 1320 (ASC520132-SW)

Coast Guard Drawing 750-WMSL-520-005, Rev E, Salt Water Cooling Unit 2110 (ASC520211-SW)

Coast Guard Drawing 750-WMSL-520-008, Rev F, Salt Water Cooling Unit 2210 (ASC520221-SW)

Coast Guard Drawing 750-WMSL-520-506, Rev B, Auxiliary Seawater Piping Mods FWD Fr 52

NAVSEA Drawing 804-1385781, Rev E, Hangers, Pipe, for Surface Ships NAVSEA Drawing 803-1385866, Rev E, Penetration, Bulkhead and Deck NAVSEA Drawing 804-5959214, Rev-, Piping Insulation - Installation Details

Coast Guard Publications

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2014, General Requirements

Surface Forces Logistics Center Standard Specification 0740 (SFLC Std Spec 0740), 2014, Welding and Allied Processes

Surface Forces Logistics Center Standard Specification 0085 (SFLC Std Spec 0085), 2014, General Requirements for Drawing Preparation

Surface Forces Logistics Center Standard Specification 6310 (SFLC Std Spec 6310), 2014, Requirements for Preservation of Ship Structures

Other References

Federal Specification (Fed Spec) HH-P-151, Mar 1991, Rubber-Sheet, Cloth Insert

MIL-STD-419, Jul 1987, Cleaning and Protecting Piping, Tubing and Fittings for Hydraulic Power Transmission Equipment

The Society for Protective Coatings (SSPC)/NACE International (NACE) Joint Surface Preparation Standard SSPC-SP 10/NACE No.2, 2004, Near-White Blast Cleaning

MIL-A-24179, Jun 1987, Adhesive, Flexible Unicellular-Plastic Thermal Insulation

MIL-DTL-24244, May 2000, Insulation Material, With Special Corrosion, Chloride, and Fluoride Requirements

MIL-I-16411, Nov 1988, Insulation Felt, Thermal, Glass Fiber

MIL-Y-1140, Sep 1985, Yarn, Cord, Sleeving, Cloth, And Tape- Glass

ASTM International (ASTM) F683, 2003, Standard Practice for Selection and Application of Thermal Insulation for Piping and Machinery

ASTM International (ASTM) A53, 2005, Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated Welded and Seamless

Code of Federal Regulations (CFR) Title 29, Part 1915, Section 15, 2007, Shipyard Employment

Commercial Item Description (CID) A-A-59588, 2005, Rubber Silicone

DOD-STD-2188, Apr 1987, Babbitting of Bearing Shells

Federal Specification (Fed Spec) HH-P-151, Mar 1991, Rubber-Sheet, Cloth Insert

MIL-STD-419, Jul 1987, Cleaning and Protecting Piping, Tubing and Fittings for Hydraulic Power Transmission Equipment

The Society for Protective Coatings (SSPC)/NACE International (NACE) Joint Surface Preparation Standard SSPC-SP 10/NACE No.2, 2004, Near-White Blast Cleaning

3. REQUIREMENTS

3.1 General.

3.1.1 CIR

None.

3.1.2 Tech Rep.

Not Applicable.

3.1.3 Protective measures - general. The Contractor shall furnish and install all protective coverings to seal off and protect all non-affected vessel's components, equipment, and spaces in the vicinity of the work area against contamination during the performance of work. Upon completion of work, the Contractor shall remove all installed protective measures, inspect for the presence of contamination, and return all contaminated equipment, components, and spaces to original condition of cleanliness.

3.1.4 Interferences. The Contractor shall handle all interferences in accordance with SFLC Std Spec 0000, paragraph 3.3.5 (Interferences). Known interferences include, but are not limited to the following.

· Sheathing

· Bulkhead insulation

· Piping

· Electrical Cables

· Deck Plating

· Engine Room Bilges

· Overhead Light

NOTE: A VERIFICATION SHIP CHECK BY THE CONTRACTOR PRIOR TO BIDDING IS RECOMMENDED TO DETERMINE SIZE, MATERIAL & PIPING MODIFICATION. SHIP CHECK BY THE CONTRACTOR IS RECOMMENDED TO DETERMINE EXACT COMPONENTS LOCATION AND PIPING REQUIRED FOR THIS WORK ITEM. FOR SHIP CHECK, THE CONTRACTOR SHALL CONTACT: CONTRACTING OFFICER

3.1.5 Background. This work item provides instruction to modify sections of the ASW system to prevent reoccurring erosion damage due to excessive flow and cooling water starvation due to inadequate strainer capability.

3.1.5.1 Excessive ASW flow velocity will be reduced by installing special flow control devices designed to regulate pressure and flow to acceptable design parameters. The devices will be placed immediately downstream of the affected equipments.

3.1.5.2 Duplex (i.e. Self cleaning), Hayes Measured Flow, Cascade Orificial Restrictive Devices, Valves and Wye Strainers shall be installed to protect equipment from cooling starvation.

3.1.6 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.

3.1.7 Piping rip-out. The Contractor shall mark all piping which is to be removed as per this work item for the Coast Guard Inspector approval.

3.1.8 The Contractor shall conduct all hot work in accordance with SFLC Std Spec 0740.

3.1.9 The Contractor shall remove and discard foam insulation from the piping and valves.

3.1.10 Fluid handling. The Contractor shall drain and dispose of residual fluid from piping in accordance with all Federal, state, and local rules and regulations.

3.2 General installation requirements. The concerned work areas are shown in the Table 1. See the Coast Guard Drawings above, for guidance and details.

3.2.1 Work location. The Concern work location is listed in the Table 2.

Table 2: - work location

3.2.2 Cutter personnel will assist in locating all items required to be secured or isolated, and tagged for work under this item.

3.2.3 All water that drains from the affected piping system shall be cleaned up and removed within 1 hour of draining. Any water that drains on the cutter’s decks shall be cleaned up and removed immediately. The Contractor shall drain and dispose of all residual waters in the piping system in accordance with all Federal, state, and local rules and regulations.

3.2.4 Hangers. All new piping shall be adequately supported against vibration in accordance with NAVSEA Dwg 804-1385781. Pipe hangers shall be rubber lined. Hanger spacing shall be no greater than 6 feet. Relocate existing piping hangers as needed to support new piping and valve installation. Pipe hanger shall be painted in white color.

3.2.5 All pipe bends shall be in accordance with MIL-STD-1627.

3.2.6 All pipe threaded connections (tapered or straight pipe threads) shall be sealed during assembly using polytetrafluorethylene (PTFE) tape.

3.2.7 All new flange bolting fasteners shall be Monel per QQ-N-281, Class A, Grade 400.

3.2.8 Gasket material for flanged joints shall be synthetic rubber sheet per MIL-PRF-1149; rubber inserted cloth sheet per HH-P-151; 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.

3.2.9 Bulkhead and deck penetrations. The Contractor shall furnish and install all bulkhead and deck penetrations in accordance with procedures and notes shown on NAVSEA Drawing 803-1385866.

3.2.10 Pipe flushing. After all authorized work is completed, the Contractor shall accomplish the following:

3.2.10.1 Flush all new and disturbed piping with clean fresh water until all debris is removed but not longer than five minutes. Ensure flushing water is directed to move scale and foreign debris away from installed machinery to prevent possible damage upon operational testing. Submit a CFR documenting date and time of flushing process and levelof pipe cleanliness. Blow dry all flushed piping with dry, low-pressure air. Ensure all water is removed to prevent contamination of the fuel oil systems.

warning

Do not drain any waters including fresh water into any space, bilge or exterior location

3.2.10.2 Dispose of flushing water in accordance with all applicable Federal, state, and local regulation.

3.2.11 Pipe labeling. The Contractor shall accomplish the following:

3.2.11.1 Stencil the following onto the pipe surfaces:

· Name of the piping system service.

· Destination, where feasible.

· Direction of flow, indicated by an arrow three inches long pointing away from the lettering (For reversible flow, point an arrow away from each end of the lettering).

· If the is pipe insulated, marking shall be done on the insulated surfaces.

3.2.11.2 Ensure all lettering and arrow(s) are as follows:

· In general, black color except white for dark-colored piping.

· Applied in conspicuous locations and preferably near control valves.

3.2.12 Insulation installation (New). The Contractor shall install new insulation materials over the following exposed pipe surfaces at thicknesses appropriate to the application and temperature ranges specified in ASTM F683, Tables S1.1, S1.2, and S1.4, and in accordance with details in NAVSEA Drawing 804-5959214:

· Associated pipe hangers

· Valves

· Fittings

· Flanges

3.2.12.1 The Contractor shall paint the newly installed insulation system in accordance with SFLC Std Spec 6310, Appendix B (Cutter and Boat Interior Painting Systems).

caution

USE GLASS CLOTH LAGGING ONLY IN HIGH TRAFFIC AREAS WHERE INSULATION IS SUBJECT TO DAMAGE

3.2.13 New piping shall follow same routing as existing piping. Template new piping installation from the existing removed piping.

3.3 Temporary cooling. For the Cutter’s cooling requirement, the Contractor shall perform work on one A C Plant at a time to allow continued cooling for ship’s equipment and crew.

3.3.1 The Contractor shall install a temporary jumper hose from the ASW supply system (valve SW-V-036) to the inlet of the A and B sides of the No. 1 A/C plant. After work is completed and flow is restored to the cooling system for the A/C Plants, remove the jumper.

3.3.2 The government is aware that there will be limited times when A/C is not available due to time required to make piping connections. Coordinate with the Coast Guard Inspector to determine outage times for A/C systems.

3.4 Materials. The Contractor shall provide materials as listed on Coast Guard Drawing 750-WMSL-520-506. The Contractor shall supply pipes, fittings, gauges and flanges required for complete modification of the ASW System.

3.4.1 The contractor shall provide miscellaneous hardware (i.e. Pipe Hangers, Brackets & Fasteners) required for complete modification of the ASW System.

3.5 AC Plant No.1, No.2 & No.3 piping rip-out. The Contractor shall rip-out piping of AC Plants as shown on Coast Guard Drawing 750-WMSL-520-506 in accordance with SFLC Std Spec 040.

3.5.1 Existing piping installation of AC Plant is shown on Coast Guard Drawing 750-WMSL-520-004.

3.5.1 The Contractor shall turn over all removed material to Coast Guard for disposal.

3.5.2 The Coast Guard Inspector will verify piping rip-out is as shown on Coast Guard Drawing 750-WMSL-520-506 (Sheet 2).

3.6 AC Plant No.1, No.2 & No.3 piping installation. The Contactor shall install new piping on each AC plant as shown on Coast Guard Drawing 750-WMSL-520-506.

· Install Piece 58 (i.e. Orifice Plate) of the Coast Guard Drawing 750-WMSL-520-506.

· Orifice Plate to be installed in the discharge line directly downstream of A and B side condenser collector junction in the overhead but before intersecting the common overboard discharge pipe

· Install 3” Hellan Self-Cleaning Strainers, A and B sides

· Strainers to be installed in the seawater supply line after the A and B side branch but before the A and B side condensers

· Differential Pressure Gauge is to be included with each strainer the installation

· 1.5” flush line with ball valves is to be included with each strainer installation and is to tee into the common discharge after all Orifice Plates.

· Install 3” butterfly valves, A and B sides

· Butterfly valves to be installed in previous location after the A and B side condensers but before the A and B side collector junction

· Install condenser discharge Tees, A and B sides

· 70-30 Cu-NI Tees to be installed in previous locations forming the condenser discharge, bypass discharge, and main discharge junction

· Common Overboard Discharge

· Remove existing 5” 90-10 Cu-NI overboard discharge pipe

· Install 6” 90-10 in place of existing 5” overboard discharge pipe

· Common Seawater Supply

· Remove existing 5” Tee supplying AC Units #2 and #3

· Install 6” Sweep Tee in place of existing 5” Tee

3.6.1 The Contractor shall template new piping installation from each A C Plant Equipments.

3.6.2 The Coast Guard Inspector will verify new piping installation is according to Coast Guard Drawing 750-WMSL-520-506.

3.7 ASW Pump bleed line rip –out. The Contractor shall rip-out the ASW Pump No.1 and No.2 piping as shown on Coast Guard Drawing 750-WMSL-520-506 (Sheet 3 and 4) in accordance with SFLC Std Spec 0740.

3.7.1 The Coast Guard Inspector will verify piping rip-out is according Coast Guard Drawing 750-WMSL-520-506.

3.7.2 Existing installation of Aux Sea Water Cooling Pump is shown on Coast Guard Drawing 750-WMSL-520-005 & 750-WMSL-520-008.

3.8 ASW Pump bleed line modification. The Contractor shall install new piping on ASW Pump No.1 and No.2 as shown on Coast Guard Drawing 750-WMSL-520-506 (Sheet 8 & 9) in accordance with SFLC Std Spec 0740.

· Install 1 ½” 50 GPM Hays Mesurflo device

· Hays Mesurflo device to be installed in place of currently installed orifice plate

· Install 1 ½” Wye Strainer

· Wye Strainer to be installed immediately above Hays Mesurflo Device

· Install 1 ½” 70-30 Cu-Ni Pipe

· 70-30 Pipe to be installed in the place of the existing 90-10 pipe serving as the bleed line.

3.8.1 The Coast Guard Inspector will verify new piping installation is according to Coast Guard Drawing 750-WMSL-520-506 (Sheet 8 and 9).

3.9 Ship Service Diesel Generator No.1 and no.2 ASW Inlet Piping rip-out. The Contractor shall remove existing 4 Inch X 3 Inch eccentric reducer (90-10 Cu-Ni) and resilient mount as shown on Coast Drawing 750-WMSL-520-506 (Sheet 5).

3.10 Ship Service Diesel Generator No.1 and no.2 ASW Inlet Piping modification. The Contractor shall install new 4 Inch X 3 Inch Eccentric Reducer (70-30 Cu-Ni) as shown on Coast Drawing 750-WMSL-520-506 (Sheet 10).

3.10.1 Existing installation of Ship Service Diesel Generator No.1 and no.2 ASW Inlet Piping is shown on Coast Guard Drawing 750-WMSL-520-005 & 750-WMSL-520-008.

3.11 Clean and flush piping. The contractor shall ensure all piping is cleaned, flushed, and tested in accordance with Reference NAVSEA Technical Publication, 0900-LP-001-7000, Fabrication and Inspection of Brazed Piping System.

3.12 Verification. The Contractor in the presence of the Coast Guard Inspector shall verify that all modification of the piping meets the requirement of the Coast Guard Drawing 750-WMSL-520-506.

3.12.1 All new piping equipments (i.e. Wye Strainers, Self Cleaning Strainers, Hayes Measured Flow, Orifice plates, Reducers, Sight Flow Indicators, Valves) properly installed in accordance with Coast Guard Drawing 750-WMSL-520-506.

3.12.2 Verify that all piping is properly supported with hangers to prevent damage from vibration.

3.12.3 Verify that piping and valves are insulated.

3.13 Testing. The contractor shall coordinate all quality assurance inspections with the designated Coast Guard Inspector to minimize installation or testing delays.

3.13.1 After all work has been completed, the Contractor shall, in the presence of the Coast Guard Inspector, accomplish the following tasks, and submit a CFR.

3.13.2 Leak test. After completing all authorized mechanical (i.e. threaded, bolted, etc.) joint repairs, the Contractor shall test the piping system's operation using the system fluid at normal operating pressure. Ensure zero visible leakage from or deformation of mechanical parts or new joints. Repair all leaks and discrepancies. Submit a CFR

3.13.3 Thoroughly test and prove the piping system to be in satisfactory operating condition.

3.14 Operational test – post repairs. After completion of work, the Contractor shall thoroughly test, in the presence of the Coast Guard Inspector and demonstrate all items or shipboard devices that have been disturbed, used, repaired, altered, or installed to be in satisfactory operating condition. Submit a CFR.

3.14.1 Operate each AC Plant for four hours. Ensure zero visible leakage from or deformation of mechanical parts by repairing all leaks and discrepancies. Submit a CFR.

3.15 Touch-up preservation. The Contractor shall prepare and coat all new and disturbed exterior and interior surfaces to match existing adjacent surfaces, in accordance with the SFLC Std Spec 6310, Appendix A (Cutter and Boat Exterior Painting Systems) and Appendix B (Cutter and Boat Interior Painting Systems), respectively, and as applicable. Abide by all touch-up requirements outlined in SFLC Std Spec 0000, Appendix A (Requirements for Preservation of Ship Structures).

3.16 Red-lined drawing deliverable(s). The Contractor shall “red-line” Coast Guard Drawing 750-WMSL-520-506 to clearly reflect the work or deviations specified in this work item.

3.16.1 By 24 hours after completion of this work item, submit a draft copy of the "red-lined" drawing(s) to the COR for review and approval.

3.16.2 By 10 calendar days after receiving Coast Guard comments or completion of the availability, whichever occurs first, incorporate all comments and deliver one set of the final red-lined drawing(s) to the COR.

4. NOTES

This section is not applicable to this work item.