0961_FREEBOARD PRESERVATION (5 YR)_TAOE_CCSI.docx

ABSTRACT

This item describes the surface preparation and painting of the freeboard. This preservation involves a full blast of the freeboard.

REFERENCES

NAVSEA Drawing No. 601-6363098, Compt Access and Deck Support Outboard Profile

1.1 Surface Preparation Standard, SSPC-SP WJ-1/NACE WJ-1, Waterjet Cleaning of Metals – Clean to Bare Substrate (WJ-1) (Available Commercially)

1.2 Surface Preparation Standard, SSPC-SP10/NACE 2, Near White Metal Blast Cleaning (Available Commercially)

1.3 PPG PMC - MSC Paint Handbook

1.4 PPG Product Data Sheets; Amercoat 240 and Amershield

ITEM LOCATION/DESCRIPTION

Location: Freeboard

1.5 Quantity: Total Area of Freeboard: 48,300 square feet

Area to Be Blasted: 48,300 square feet

1.6 Description: The Freeboard is defined as the hull surfaces from the top of the boot top to the top of the highest point on the continuing plane of the hull. This area includes the forecastle, hawse pipes, sideport doors, vent louvers, stern and the outboard surfaces of the bulwarks.

2.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICE

2.1 Government Furnished Equipment (GFE): None

2.2 Government Furnished Material (GFM):

USNS ARCTIC

(T-AOE 8)

FREEBOARD PRESERVATION (5 YR)

961-8

2.3 Government Furnished Services

2.3.1 PPG Coating Representative

3.0 NOTES

3.1 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 GTR’s including but not limited to GTR’s 1 through 7, 22, 23, 24, 28, and 29.

3.2 The contractor and all subcontractors, regardless of tier are advised to review other work items under this contract, including but not limited to Work Items XXX, XXX, and XXX 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 001.

3.3 Solvents supplied as GFM are for viscosity control only. Solvents required for equipment clean-up are the responsibility of the contractor.

4.0 QUALITY ASSURANCE REQUIREMENTS: None additional

5.0 STATEMENT OF WORK REQUIRED

5.1 Surface prepare and paint the vessel’s freeboard identified in section 3.0 using References 2.1 through 2.5 as guidance.

5.2 Prior to the start of any surface preparation:

5.2.1 Record all hull markings, labels and weld bead lines documenting their information (text), size, color, positions and symbols to include, but not limited to, the vessel NAME, IMO #, Hull #, Hull # shadow outline, boot topping, drafts, and thruster symbol. Submit a copy of the record to the OMT REP.

5.2.2 Note the condition of any damaged or missing overboard drain covers, port lights, sideport doors, NIXIE port covers, and ventilation louvers.

5.3 With assistance from the Ship’s Crew tagout:

5.3.1 Sideport doors

5.3.2 NIXIE port covers

5.3.3 All overboard discharges in way of surfaces being prepared and painted.

5.4 Provide manlifts and/or erect staging as required to access all applicable surfaces as identified in the base work item.

5.5 Paint material is to 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° F.

5.6 Provide and maintain adequate lighting of a suitable nature during the course of all surface preparation, coating and inspection activities.

5.7 Temporarily remove all flight deck down comer drain covers.

5.8 Masking

5.8.1 Prior to start of surface preparation the contractor is to ensure that the vessel's equipment is protected from contamination and/or damage caused by blasting abrasive, dust or paint. Install masking, plywood covers, tarps, seals, blanks and filtering materials to prevent abrasives and foreign substances from entering the ship, machinery, piping, hatches, deck drains, ventilation systems, tank vents, valve stems, motor shafts, seals and temporary openings during blasting and painting operations. Measures to be taken include, but are not limited to, the following:

a. Plug open ends of pipes, drains, scuppers, vents and ducts.

b. Temporarily install protective covering on all normally unpainted surfaces.

c. Grease and wrap all valve stems and exposed portions of hydraulic cylinders.

d. Temporarily install stack covers on the main and auxiliary uptakes.

e. Temporarily install filter media on all fuel tank vents and air intake vents.

f. Temporarily install protective coverings on port lights, sideport doors, and NIXIE hatches in the freeboard.

g. Temporarily install protective coverings over all access cut openings.

h. Protect running rigging (cargo falls, davit falls, lifts, and cranes) and mooring lines which cannot be stowed or removed for the duration of blasting.

i. Overboard discharges for services which cannot be curtailed, such as reefer cooling water overboard, are to be carried-off by means of temporary scuppers, and hoses in order to prevent recontamination of the hull after surface preparation;

j. Protective covering is to be inspected at regular intervals, but not less than at the start of each work shift. Degraded protective covering is to be repaired prior to the restart of work.

k. Contamination of the vessel and its equipment is to be reported to the OMT REP verbally immediately upon its discovery, followed by a written report within four (4) hours of the verbal notification. The contractor is responsible for cleaning the contaminated equipment and showing that the contamination has not caused damage to same. Cost to repair equipment damaged by such contamination is to be borne by the Contractor.

5.9 Surface Preparation

5.9.1 All areas of the freeboard are to be high pressure water washed to remove all grease, dirt, marine growth (slime, grass, tube worms, and barnacles), peeling, blistered and flaking paint and salts. Equipment utilized shall maintain a minimum discharge pressure of 2,500 to 3,000 psi.

5.9.2 Solvent Cleaning the freeboard using SSPC-SP1, Protective Coating Society, using biodegradable detergent to remove all dirt, oil, grease, soluble salts or other organic matter from the specified surfaces. Biodegradable cleaners or other eco-friendly methods/agents are to be used to the greatest extent possible.

5.9.3 Final wash-down is to be made with clean, fresh water at 2,500 to 3,000 PSI. Upon completion of all water washing, chloride testing is to be performed at a rate of no less than one (1) test per 500 square Feet of surface.

5.9.4 The maximum allowable contamination concentrations is to be less than 10 ug/cm2 of chloride contaminants as determined by field or laboratory analysis using reliable, reproducible test equipment.

5.9.5 If contamination is found, additional water wash is to be performed. Additional tests are to be made as necessary to determine the extent of contamination and to prove the success of remediation.

5.9.6 Upon completion of the HP water washing and prior to the start of surface preparation:

a. Take and record Dry Film Thickness readings of the existing coatings at a rate of one (1) spot reading per 500 SF. DFT gages shall be calibrated and spot readings are to be taken using SSPC-PA2, Measurement of Dry Coating Thickness With Magnetic Gages. Prepare a report showing the existing antifouling system DFT. Submit the results of the DFT inspection to the OMT REP within 24 hours of completion.

b. Conduct a survey of the entire freeboard with the Ships Superintendent, Shipyard Paint Supervisor, OMT REP and MSC Paint Representative in attendance. Identify the location and quantity of all surface areas to be spot blasted. Submit a condition report to the OMT REP summarizing the results of the survey, location and square footages to be blasted within 24 hours of completion.

5.9.7 Areas of the freeboard identified by the OMT REP to be blasted are to be prepared to bare metal using one of the following approved methods for surface preparation:

a. Ultra High Pressure water jet using Reference 2.2. All water jetted areas are to be prepared to a WJ-2, NV-2 Condition. Ensure that the surface profile is 2 to 3 mils. No more than a light (L) grade flash rust is allowed on the steel at the time of coating application. If heavier flash rust is present, the surface is to be restored to a coatable condition by fresh water pressure washing at 2,500 to 3,000 psi and allowing it to dry or by other suitable means.

b. Dry abrasive blast using Reference 2.3; SSPC-SP10/NACE 2, Near White Metal Blast Cleaning as guidance. The surface profile achieved is to be angular in nature, and within the range set by the coating manufacturer’s product data sheet for the coating system being applied. Prior to the start of abrasive blasting the blast media is to be tested to ensure that it is not contaminated with chlorides, as determined by field or laboratory analysis using reliable, reproducible test equipment.

5.9.8 Profile is to be determined using a Keane-Tator (or equal) Surface Profile Comparator. Testex (or equal) Replica Tape is to be used at a rate of one (1) reading per 1,000 SF for verification. Replica Tape is to be mounted, identified as to location and included as part of the final paint report.

5.9.9 Whether prepared by abrasive blasting, water jetting or other means, the edges of the surrounding intact coating is to be feathered-in.

5.9.10 Regardless whether the surfaces are abrasive blasted or UHP Water Jetted, immediately prior to coating the surface is to be re-tested for non-visual surface contaminates at a rate of no less than one (1) test per 1,000 SF of prepared area. The maximum allowable contamination concentrations for surfaces prepared by means of dry abrasive blasting is to be less than 10 ug/cm2 of chloride contaminants as determined by field or laboratory analysis using reliable, reproducible test equipment. For those surfaces prepared by means of UHP water jetting, the limits detailed in Reference 2.2 apply.

5.10 Coatings Application

5.10.1 Prior to application of any coating, the area to be painted is to be inspected and approved by the OMT REP and the OMT Paint Representative. This includes not only the initial coat of paint, but all subsequent coats as well. Ensure the conditions outlined in Reference 2.4 and the following are met prior to painting:

a. Surfaces are to be clean, dry and free of oil, grease or residue from abrasive blasting

b. The edges of the spot blasted areas are to be feathered-in;

c. The surface appearance of the prepared surface is to meet the definition established by the cited surface preparation standard used.

d. Air and substrate temperatures is to be within the range published by the paint manufacturer;

e. The substrate temperatures must register at least 5°F (3°C) above the Dew Point temperature;

f. The relative humidity is within the range set by the manufacturer’s product data sheet. In the event that there is no range established by the manufacturer, the relative humidity is to be no higher than 85 percent;

g. No coating is to be applied at temperatures below 35°F without prior written approval of the OMT REP;

h. Painting is not to be performed between the hours of sunset and 0800 without prior written approval of the OMTREP;

i. Any overspray is to be removed prior to the application of the next coat of paint in the system;

j. Material Safety Data Sheets for the products being applied are on the job site and have been reviewed by the personnel involved.

k. Weather forecast is not to predict condensation or rain. Amershield exposed to early condensation or rain may cause color or gloss change.

5.10.2 All coatings are to be prepared and applied using the manufacturer’s requirements outlined in the Product Data Sheets, Reference 2.4 as guidance.

5.10.3 Measure and record the following conditions in the presence of the OMT Paint Representative prior to the application of any paint coating:

a. Surface profile as determined by Keane-Tator Comparator (or equal) examination and/or replica tape.

b. Non-visual surface contaminates at random locations.

c. Surface temperature.

d. Ambient air temperature.

e. Dew point temperature and relative humidity.

f. Over coating interval (curing time) since previous application.

g. Dry Film Thickness (DFT) of previous coating taken at a rate of five per 1,000 square feet. DFT gages are to be calibrated, spot readings are to be taken and DFT tolerances are to be using SSPC-PA2, Measurement of Dry Coating Thickness With Magnetic Gages as guidance.

5.10.4 Random Wet Film Thickness (WFT) readings are to be taken during the application of coatings to verify correct millage are being applied.

5.10.5 All coatings are to be allowed to air dry. The minimum and maximum times to recoat is to be using the manufacturer's recommendations as guidance.

5.10.6 Apply the following coatings to the freeboard using References 2.4 and 2.5 as guidance. Only the areas blasted to bare metal are to receive the two (2) coats of anti-corrosive epoxy. All other areas identified as having intact AC are to be top-coated with the two (2) coats of antifouling:

a. TOP OF BOOTTOP TO HIGHEST POINT OF HULL

b. HAWSE PIPES:

Black

c. HULL MARKINGS:

1 Black markings on gray or white freeboards and white markings on black freeboards.

5.10.7 The environmental conditions, DFT of each coat, cure and over coating intervals are critical to the application. The application of all coatings is to adhere to the Product Data Sheets and OMT Paint Rep. For weather conditions outside 35°F (-1°C) through 90°F (32°C) range consult the OMT Paint Rep for proper overcoat intervals.

5.11 Upon completion the vessel is to be cleaned of all residues resulting from the surface preparation and painting operations. Remove all protective coverings, debris and replace all interferences removed in the performance of this item.

5.12 Reports

5.12.1 The contractor is to prepare a Paint Report and submit same to the OMT REP within three (3) days of completing the coating application. The report is to include the following data:

5.12.2 The location, date and time of each coating application.

5.12.3 The air and substrate temperatures, relative humidity and dewpoint temperature at the time of each coating application.

5.12.4 Interval between coatings.

5.12.5 Dry film thickness readings of each coating.

5.12.6 Paint Manufacturer, Product Identification Number, color and Batch Numbers for each coat of paint applied.

5.12.7 Surface profile measurements of the metal substrate.

5.12.8 Results of testing for non-visible surface contaminants (soluble salts).

5.13 Painting: None additional

5.14 Manufacturer's Representative

5.14.1 A Government provided Paint Technical Representative will be in attendance, on the government’s account, to observe the surface preparation and coating application on the government’s behalf and to advise the OMT REP as to the quality, and appropriateness of the contractor’s efforts. The Government provided Technical Representative is not for supervision of the contractor’s workforce.

5.15 Preparation of Drawings: None additional

8.0 GENERAL REQUIREMENTS: None additional