USNS MARY SEARS
T-AGS 65
Solic. No.: MLL-16-T65-0001
HULL STRUCTURE September20, 2016
ITEM NO. 0110 CATEGORY “A” USMMI/MLL/RCS
Revision A
BLAST PAINT THE FOREPEAK STORAGE DECK LINE BASKET BALLAST TANKS 4-24-1 & 2
1.0Abstract:
1.1.Blast and paint the forepeak storage space deck, lower bulkhead areas and in way of the line basket and line basket and the forward ballast tanks 4-24-1 and 2.
2.0References/Enclosures:
2.1References:
2.1.1MSC Standard Item #25, Exterior Decks, Initial Coatings
2.1.2Paint Product Guide for Applications.
2.1.3PPG Product Data Sheets.
2.2Enclosures:
2.2.1MSC Standard Item #25
2.2.2Photos of the space & basket
3.0Item Location/Description:
3.1Location.
3.1.1Forepeak Storage Space (1-E-0)
3.1.2Forward Ballast tanks 4-24-1 & 2
3.2Description.
3.2.1The total surface area to be spot blasted is approximately 2500 square feet.
3.2.2The total surface area to be painted is 2500 sq. ft.
4.0USMMI Furnished Materials/Equipment/Services:
4.1USMMI Furnished Equipment (USMMIFE): None
4.2USMMI Furnished Material (USMMIFM):
4.2.1Dimetcote 9H, 13 gallons
4.2.2Amercoat 240 Buff, 13 gallons
4.2.3Amercoat 240 Haze Gray (13) gallons
4.2.4Amercoat 240 White (13) gallons
4.2.5Prep 88 (4) gallons
4.2.6Amercoat 65 (13) gallons
4.2.7Amercoat T-10 (13) gallon
4.3USMMI Furnished Services (USMMIFS):
4.3.1PG Paint Representative
4.4USMMI Furnished Information (USMMIFI):
4.4.1Drawings shall be provided by the ship / USMMI Port Engineer
5.0Notes:
5.1The Contractor and all Sub-Contractors, 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 Sub-Contractors, regardless of tier, must comply with the requirements of all applicable GTR's including but not limited to GTR's 1 through 7 and 21 through 29. GTRs can be retrieved from the Internet at the following URL:
5.2The Contractor and all Sub-Contractors, 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 are found in Work Item 0001.
5.3The Contractor shall comply with all requirements of equipment Tag-Out Program as established by COMSCINST 3540.6, as amended, section 15.2.2, Engineering Operations and Maintenance Manual. The Chief Engineer is to administer the Tag-Out Program. Prior to the start of work, the Contractor shall contact the USMMI Port Engineer and / or the Chief Engineer to coordinate the implementation of the Tag-Out Program for the entire performance period of this item. The Prime Contractor shall be responsible for compliance by both Prime and Sub-Contractor personnel.
5.4Any additional work will require a Change Order (with costs associated) submitted to the Port Engineer for approval, before the additional work is performed.
5.5The Contractor must arrange for the attendance of ABS and / or the USCG for internal exams, inspections and any tests they may require regarding any repairs.
5.6Amercoat 240 is a two part epoxy having a mix ratio of 4:1 resin to cure and volume solids of 87%. It has been approved for use on MSC ships in virtually all areas EXCEPT potable water tanks and on NAVAIR certified decks. In actuality, Amercoat 240 is a reformulation of Amercoat 235 & Amercoat 236 (Bar-Rust 235 and 236 prior to Ameron acquiring those products as part of their purchase of Devoe Marine). This reformulation reduced the VOC level and improved the cold weather curing.
5.7Amercoat 240 is surface tolerant and will accept a hand or power tool cleaned surface. However, for severe service conditions, for example immersion service, abrasive blasting to Near White Metal in accordance with SSPC-SP10/NACE 2 and producing a surface profile of 2 - 3 mils is recommended. Alternately, provided the required surface profile exists, UHP water jetting to a WJ-2L, NV-2 condition in accordance with SSPC-SP12/NACE 5 is an acceptable alternative.
5.8In addition to its almost universal usage, another very attractive attribute is its cure at low temperatures. While cure times increase steadily as temperatures drop, it will continue to cure down to 0o F without additives or alternate curing agents. For example, a 6 mil coating will cure hard in 6 hours at 90o F, 13 hours at 50o F, 30 hours at 32o F and 48 hours at 16o F. Even at 20o F, the cure time to immersion is 7 days. Yet even with that, the pot life at 80o F is an hour and at 90o F it’s 40 minutes which, in production situations should not constitute any problem. For ship’s force maintenance applications in high temperatures, consideration should be given to ordering more of the one gallon packaging that is available.
5.9Application may be accomplished by spray, roller or brush. For spray application airless spray using a (minimum) 45:1 pump and .021” to .025” spray tip is recommended. Brush and roller application is fine for repair and touch-up work, but remember that brush or roller application yields only 2 to 3 mils DFT per coat. Multiple coats will be required to achieve the recommended 6 mil DFT per coat.
5.10(For Estimating purposes assume one (1) gal. of Amercoat 240 per 200 sq. ft.)
6.0Quality Assurance:
6.1All workmanship shall be accomplished to guidance provided by the onsite Paint Representative and in compliance with the guidance in reference 2.1.
7.0Statement of Work:
7.1Prior to cleaning, the Contractor shall ensure that the ship's equipment is protected from damage caused by dust, scale and paint. Measures to be taken include, but are not limited to, the following.
7.1.1Plug open ends of pipes, vents and ducts.
7.1.2Wrap all cableswith watertight bags and tape seal at each end.
7.1.3Wrap all equipment such as the TLI stuffing tube and floats.
7.1.4In areas to be abrasive blasted and coated, tape over all placards.
7.1.5Install protective covering on all receptacles, outlets, junction boxes and lights.
7.1.6Mask all normally unpainted surfaces such as light globes, label plates, etc.
7.2The line basket is to be temporarily emptied and the line is to be stowed in a safe location. The basket is to be temporarily removed ashore and then blasted and painted. The TLI kick pipe is to be replaced under specification 0107.
7.3Blast and feather to tightly adhered paint in accordance with SSPC-SP-10 requirements. For estimating purposes, assume 2500 square feet to be blasted to SSPC-SP-10 in the following locations.
7.3.1.1The Deck and lower bulkheads and the bulkhead in way of the line basket
7.3.1.2In the 4-24- 1&2 ballast tanks the overheads and transverse bulkheads and side shells where the coating is blistered or damaged.
7.4Thinner wipe clean deck, frames and surrounding bulkheads using Prep 88.
7.5Contractor shall furnish the necessary equipment to provide suitable painting conditions. Forced air and dehumidifiers are required to provide suitable conditions for painting.
7.6Paint Representative and USMMI Port Engineer to inspect the surface as well as paint conditions prior to painting.
7.7Upon acceptance from the USMMI Port Engineer, apply one coat of Demecote 9H andtwo coats of Amercoat 240. To the deck and lower sections of the bulkheads.
7.7.1The first coat is to be Dimetcote 9H green at 3-4 mils DFT,
7.7.2The second coat is to be of Amercoat 240 Red Oxideat 4-5 mils DFT.
7.7.3The Top coat of Amercoat 240 shall be Haze Gray for the deck and white for the bulkhead, applied at 5-6 mils DFT.
7.7.4For the ballast tanks the first coat should be red oxide and the top coat white.
7.8Upon completion of painting, remove all masking and staging and perform a final walk-through and close out inspection with the USMMI Port Engineer and onsite Paint Representative.
7.9Reinstall the line basket and then mechanically clean all of the disturbed areas and paint with two coats of Amercoat 240 at 4-5 mils DFT with the first coat being red oxide and the top coat white.
7.10Tests and Inspections, and Reports and Deliverables shall be accomplished by the Contractor with their Quality Assurance Representative in attendance.
7.10.1Inspection: Wrapping and protection of areas prior to scaling and painting.
7.10.2Inspection: Surface preparation of SSPC-SP-10 after cleaning and prior to painting.
7.10.3Report: Mil thickness readings of first coat applied after cleaning.
7.10.4Inspection: Final walk-through after final application and clean up.
7.10.5Reports: Daily readings of outside temperature, dew point and steel temperature to the USMMI Port Engineer.
7.10.6The contractor shall prepare a paint report and submit same to the Port Engineer within three (3) days of completing the coating application. The report shall include the following data:
A. Date and time of applications.
B. Temperature, humidity, and dew point, at time of each application.
C. Dry film thickness readings (five per 1,000 sq. ft. of surface) for each coat of paint.
D. Manufacturer, Product Identification No. and Batch Nos. for each type of paint applied.
8.0General Requirements:
8.1The Contractor shall provide all labor, materials, staging and tools required to accomplish this specification, except as specified in Section 4.0.
8.2The Contractor shall remove and reinstall interferences as necessary to accomplish this work item.
8.3Inspection and acceptance of all work shall be by the Chief Engineer and the designated On-site USMMI representative (Port Engineer).
8.4No additional work is to be accomplished without prior written approval by the Contracting Officer, Purchasing Manager or USMMI Port Engineer. The USMMI Contracting Officer, USMMI Purchasing Manager or USMMI Port Engineer is the only person authorized to give the Contractor authorization to proceed with growth or new work. The USMMI Port Engineer is the single point of contact authorized to address technical questions.
8.5A Completion of Work Report describing all work that was performed will be delivered to the Port Engineer upon completion of all work.
8.6All areas involved in work or traversed by workmen or equipment shall be left clean and in good order.
Enclosure 2.2.1
DEPARTMENT OF THE NAVY
MILITARY SEALIFT COMMAND, ATLANTIC
ENGINEERING DIRECTORATE
BAYONNE, NEW JERSEY 07002
STANDARD ITEM NO. 25, ISSUED 2 APRIL 1993
EXTERIOR DECKS, INITIAL COATING
1. All decks to be dealt with shall be washed down with fresh water to remove salts and loose dirt. Oils and grease shall be removed by means of a biodegradable degreaser, fresh water rinsed and all resulting wastes disposed of in accordance with all Federal, State and Local environmental regulations.
2. Provide and erect all necessary staging required for proper working conditions and inspections.
3. Provide and maintain adequate lighting, of a suitable nature, during the course of all surface preparation, coating and inspection activities.
4. Prove deck drains clear and free flowing to the MSC Port Engineer. Plug or suitably blank the drain lines prior to the start of blasting. Upon the completion of all work, remove the blank and /or plug and again prove the drain to be clear and free flowing.
5. Prior to initiating abrasive blasting, the contractor shall ensure that the vessel's equipment is protected from damage caused by blasting, dust or paint. Measures to be taken include, but are not
limited to, the following:
A. Plug open ends of pipes, vents and ducts.
B. Grease and wrap all valve stems and exposed portions of hydraulic cylinders. Install filters on all air intake vents. Install covers on all fuel tank vents.
C. In areas to be abrasive blasted and coated, record all ship's markings, including information, size, and color.
D. Install protective covering on all portlights and windows.
E. Mask all normally unpainted surfaces such aslight globes, label plates, etc.
F. Protect running rigging (cargo falls, topping lifts, etc.) and mooring lines which cannot be stowed or removed for the duration of blasting and painting operations, by suitable means to preventcontamination by blasting abrasive, dust or overspray.
G. Protective covering shall be inspected at regular intervals, but not less than at the start of each work shift. Degraded protective covering shall be repaired prior to the restart of work. Contamination of the vessel and its equipment shall be reported to the MSC Port Engineer verbally immediately upon itsdiscovery, followed by a written report within four (4) hours of the verbal notification. The contractor shall be responsible for cleaning the contaminated equipmentand showing that the contamination has not caused damage to same. Cost to repair equipment damaged by such contamination shall be borne by the contractor.
6. Decks, including all permanently attached fittings such as bitts, cleats, chocks, padeyes and staples, fairleads and foundations, shall be blasted to near white metal in accordance with the Steel Structures Painting Council, Surface Preparation Standard SSPC-SP-10, Near White Blast.
7. Upon approval of the surface preparation, all blasted deck areas shall be coated with one (1) coat of inorganic zinc silicate. Care shall be used to ensure that 1) the zinc remains in suspension during the application and that 2) a "dry" spray is not applied. "Dry" sprays may cause blistering in subsequent coats. Blistering, if it occurs, shall be repaired at no additional cost to the government.
8. Zinc coated areas, when properly cured, shall be overcoated as follows:
A. Work areas around windlasses, capstans, line handling areas, lifeboat, UNREP and FAS stations, Helo and VERTREP decks, forklift corridors and walkways on decks exposed to seaways, shall be coated with one (1) coat of epoxy primer and one (1) coatof an epoxy non-skid material.
B. Non-skid shall be a product approved by QPL DOD-C-24667.
C. All remaining deck areas shall be coated with two (2) coats of epoxy, the topcoat being dark gray. These coatings shall be MSC approved in accordance with COMSCINST 4750.2, Latest Revision, Appendix B.
D. Restore all markings and color codes as original.
9. Paint material shall be stored within the Paint Manufacturer's recommended temperature range. When paint material is being applied, ensure that the material's temperature is within the Manufacturer's recommended range, but in any case, not less than 70 degrees F.
10. Ensure the following conditions are met prior to painting:
A. Surfaces shall be clean, dry, free of oil, grease or residue from abrasive blasting.
B. Air and metal surface temperatures shall bewithin the range published by the paint manufacturer.
C. The ambient air and metal temperatures register at least 5 degrees F. above the dewpoint temperature.
D. The relative humidity is no higher than 80 percent.
E. No coating shall be applied at temperatures below 35 degrees F. without prior written approval of the MSC Port Engineer.
11. Prior to application of any coating, the area to be painted shall be inspected and approved by the MSC Port Engineer and the Paint Rep. This includes not only the initial coat of paint, but all subsequent coats as well.
12. The contractor shall prepare a paint report and submit same to the MSC Port Engineer within three (3) days of completing the coating application. The report shall include the following data:
A. Date and time of applications.
B. Temperature, humidity, and dewpoint, at time of each application.
C. Dry film thickness readings (ten per 1,000 sq.ft. of surface) for each coat of paint.
D. Manufacturer, Product Identification No. and Batch Nos. for each type of paint applied.
13. The square footage of the decks to be coated, the paint system to be utilized and provisions for the manufacturer's representative shall be as set forth in the basic specification.
14. Remove all protective covering and replace all interferences removed in the performance of this item.
15. Upon completion, the vessel shall be cleaned of all residues resulting from the surface preparation and painting operations.
16. All debris generated in the performance of this item, whether solid or liquid shall be disposed of in accordance with all Federal, State and Local regulations.
17. All work shall be inspected and approved by the MSC Port Engineer.
PHOTOS
VR15-0058
0105 - 1