0102_A_MISSION_BAY_CBG_PANEL_AND_SCUPPER_INSPECTIONS.docx

USNS TRENTON (T-EPF 5)

MISSION BAY CBG PANEL AND SCUPPER INSPECTIONS

1.0 ABSTRACT

1.1 This item describes CBG panel and bulkhead inspections and replacement of damaged panels and repair of Mission Bay Scuppers / Freeing Port drains.

2.0 REFERENCES

2.1 8444975 A: Structural Fire Protection A-60 Fire Rated Panel Mission Bay

3.0 ITEM LOCATION/DESCRIPTION

3.1 Location

3.1.1 Mission Bay, Bulkheads and Overhead

3.2 Quantity

3.2.1 Fire protection panels

3.2.2 Ten (10ea) each Mission Bay scupper/freeing port drains

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICE

4.1 Twenty (20ea) CBG fire panels: Part # 115794, panel-rac-2382-1182-16.5

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 work item, the contractor and all subcontractors regardless of tier must comply with the requirements of all applicable GTRs.

5.2 The contractor and all subcontractors, regardless of tier are advised to review other work items under this contract 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.

6.0 QUALITY ASSURANCE REQUIREMENTS

6.1 Contractor shall record the findings as stated in this SOW.

6.2 All replacement material shall be certified ABS approved.

6.3 All welding shall be in accordance with ABS rules and regulations.

7.0 STATEMENT OF WORK REQUIRED:

7.1 Remove and Inspect Mission Bay CBG panels.

7.1.1 Panels shall include all lower Main Deck level row, all forward Bulkhead panels, and all Overhead panels with all associated securing hardware/plates.

7.1.1.1 Upper-level deck panels shall be removed/inspected/replaced as directed MSCREP, as deemed necessary.

7.1.1.2 Remove all Overhead panels from frame 55 and aft for inspection of the flight deck tie downs in the overhead. Remove the panels underneath the uninsulated section from frame 55 to 42, to inspect the flight deck tie downs in the aircraft parking area. This shall be scheduled in conjunction with WI 0101.

7.1.1.3 Remove all overhead panels surrounding the Mission Bay Stanchions for inspection in conjunction with Work Item 0101.

7.1.1.4 NOTE: Great care must be taken when removing Panels.

7.1.2 Carefully remove panels to allow inspection of panel and spaces behind the panels. Each panel removed shall be labeled in accordance with drawing prepared in para 7.2.

7.1.2.1 Submit CFR annotating condition of structure and supports behind all panels removed.

7.1.2.2 Panels found with no damage may remain installed upon inspection of each side. Maintain full and clear control of all hardware removed.

7.1.3 Remove all panels located on the bottom of each bulkhead. Contractor shall clean the deck located behind the panels free of dirt and debris and wipe down with solvent.

7.1.3.1 Contractor shall provide CFR for any as found conditions of the aluminum structure and coating system behind CBG panels.

7.1.3.2 Contractor shall coat all forward bulkhead after panels are removed; assume 100 square meters. Coat using CFM Glass Flake Epoxy, one primer, one stripe and (2) two top coats.

7.1.3.3 Contractor shall repair any damaged coating behind CBG panels with the exact coating currently applied. For bidding purposes assume 200 square feet of coating will need repaired and reapplied.

7.1.4 MSCREP shall inspect for cleanliness prior to reinstallation of panels.

7.1.5 Inspection shall include structural integrity of panel and shall note any creases, folded corners, composite layer separation/delamination, water damage or other damage to the panels.

7.1.6 Provide detailed Inspection Report to the MSCREP.

7.1.6.1 Inspection Report shall include a drawing with a grid system to locate and label each respective panel.

7.1.6.2 Report shall provide a matrix of each panel with inspection results and the size of each panel (note that some panels have been trimmed to fit the space). Panels found with damage shall be documented with pictures also provided to MSCREP.

7.1.7 (CHECKPOINT) MSCREP shall select panels to replace using GFM listed in section 4.1. as required.

7.1.8 Contractor shall layout any partial panels in order to maximize the usage of each full panel. This shall be performed prior to any trimming.

7.1.9 Contractor will provide all tools, material and labor to design, construct and install up to twelve (12) 400mm x 400mm access panels in the CBG paneling, to allow for access once panels are re-installed.

7.1.9.1 Contractor will provide all stainless-steel framing and hardware.

7.1.9.2 MSC will provide the CBG panels to be used and will designate the location for the access panel installation. 25mm wide stainless strips (316SS) 1-2 meters in length. Sample strips can be provided upon arrival.

7.1.10 Contractor shall perform any trimming necessary to replace each respective CBG panel. Contractor shall take care to not trimmed panel or excess section while trimming. The excess section may be selected by the MSCREP to install in another panel location.

7.2 Clean and Inspect Scuppers.

7.2.1 Contractor shall carefully inspect all aluminum between the CBG panels and the hull of the ship for signs of pitting and/or corrosion. Pay particular attention to areas under HEF Generators and the forward pair of scuppers on port and starboard sides. Submit a list of all findings to the Port Engineer.

7.2.2 Contractor shall perform joint survey with MSCREP and ABS to determine areas to be inserted prior to any cuts. Provide repair plan with check points to MSCREP.

7.2.3 Assume insert repairs will need to be made to ten (10) Mission Bay connected Scuppers. For bidding purposes, assume:

7.2.3.1 Each scupper/freeing port drain will require 1000mm x 1000mm of 5083 aluminum to be weld inserted.

7.2.3.2 This insert may be up to six (6) separate locations on each scupper/freeing port drain.

7.2.3.3 Assume up to ten (10) areas of cracks up to 150mm in length will require repair.

7.2.3.4 Three scupper upstand lips will need removed and replaced. Twenty Feet of 6 mm thick, 100mm wide flat bar will be used as a doubler horizontally between scupper walls with a new piece of 6mm plate, 50mm wide for the upstand. The mission bay decking is a confined space and will require gas free holes for all weld work. Holes are to be refiled with an appropriate repair product compatible with Aluminum. Discuss gas free procedure and the closing of the gas free holes with Port Engineer.

7.2.4 After welding and inspections are completed Contractor shall provide all tools, labor and material to clean, prep, profile (mechanical means) and coat using CFM Glass Flake Epoxy, one primer, one stripe and (2) two top coats under the supervision of the SY paint supervisor and the MSC Paint Rep.

7.2.4.1 For bidding purposes, assume spot preservation/touch-ups to 100 square meters inside and outside each scupper and including up to 150mm along or IWO the bulkhead will be required to be coated.

7.2.5 Contractor is responsible for ensuring all adjacent spaces are certified safe for man/safe for hot work before performing any cutting, grinding or welding.

7.2.6 Once all work is complete, all repair sites shall be cleaned (hand wiped) and all CBG Panels reinstalled following a close-out inspection to be performed by a representative of the ship.

7.2.7 Submit a detailed report to the Port Engineer that records all findings, conditions and repairs.

8.0 GENERAL REQUIREMENTS: None.

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