NOAA Standard Specification 630-1 Preservation of Ship Structures.pdf

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NOAA STANDARD SPECIFICATION 630-1 PRESERVATION OF SHIP STRUCTURES

PART 1 GENERAL

SCOPE: This specification contains the general requirements for surface preparation and application of coating systems most frequently used on NOAA ships and boats.

1.1 References

ASTM INTERNATIONAL (ASTM)

ASTM D4285 (1983; R 2012) Indicating Oil or Water in Compressed Air

ASTM D4417 (2014) Field Measurement of Surface Profile of Blast Cleaned Steel

National Oceanic and Atmospheric Administration (NOAA)

NOAA 000-1 NOAA Standard Specification 000-1H "General Requirements for Work on NOAA Ships"

NOAA VC 06 NOAA Standard Colors VC 06

Occupational Safety and Health Organization (OSHA)

OSHA 1915 Z "OSHA, Toxic and Hazardous Substances, Chromium", 29 CFR 1915, Subpart Z

SOCIETY FOR PROTECTIVE COATINGS (SSPC)

SSPC QP 1 (2012; E 2012) Standard Procedure for Evaluating Painting Contractors (Field Application to Complex Industrial Structures)

SSPC SP 1 (2015) Solvent Cleaning

SSPC SP 10/NACE No. 2 (2007) Near-White Blast Cleaning

SSPC SP 11 (2012) Power Tool Cleaning to Bare Metal

SSPC SP 12/NACE No.5 (2002) Surface Preparation and Cleaning of Metals by Waterjetting Prior to Recoating

SSPC VIS 4/NACE VIS 7 (1998; E 2000; E 2004) Guide and Reference Photographs for Steel Surfaces Prepared by Waterjetting

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U.S. Coast Guard (USCG)

USCG 6310 SFLC Standard Specification 6310 "Requirements for Preservation of Ship Structures"

1.2 Government-Furnished

1. None.

PART 2 DEFINITIONS

2.1 None.

PART 3 REQUIREMENTS

3.1 General

1. The Contractor shall abide by the requirements contained herein, in addition to all other requirements that are specified in individual work items in the specification package, for all work involving surface preparation and coating applications.

2. Prior to surface preparation or painting, comply with requirements for protective coverings in

NOAA 000-1.

3. Surface preparation must be performed by a SSPC QP-1 certified contractor.,in accordance with SSPC QP 1

4. Whenever sandblasting or spray painting is performed on exterior steel surfaces at a Government facility, or when applicable regulations and laws prohibit release of blast materials or paint into the atmosphere, the surfaces must be enclosed by a cover adequate to contain the blast materials or paint.

5. Provide and erect all necessary staging and/or provide suitable alternative means (scissor lift, manlifts, etc.) required for proper working conditions and inspection.

6. Provide and maintain adequate lighting during the coarse of all preparation, coating, and inspection activities.

7. Schedule surface cleaning, preparation, and painting so that detrimental amounts of dust or other contaminates do not fall on wet, newly painted surfaces.

8. Surface preparation and paint application of shell plating or frames below the Load Waterline must only be accomplished while the ship is in drydock, unless otherwise and specifically authorized.

9. When surface preparation and coating of a compartment or surface is specified, include all plating, frames, longitudinals, beams, stiffners, brackets, baffles, and other structural steel members. In tanks, voids, and cofferdams include the ladders.

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10. When surface preparation and coating of the underwater body is specified, include the entire underwater hull plating and all appendages up to the upper boot-topping limit. Included are all rudders, struts, skegs, bilge keels, sea chest strainer plates, sea chests, domes, propulsion shafting, bow thruster tunnels, fairwaters, and rope guards.

11. Apply the first coat of paint as soon as practical after completing surface preparation to prevent degradation or contamination of the prepared surface. The first paint coat shall always be applied the same day the surface preparation is completed. Do not leave the prepared surface overnight without coating. Subsequent paint coats must be applied before contamination or degradation of the under surface occurs.

12. Comply with and enforce all safety and environmental protection regulations relative to removal, disposal, mixing, and application of paints and other materials.

3.2 Chromium Abatement

1. Some NOAA ships have areas that are primed with paint that contains chromium, which is designated as a hazardous material under OSHA 1915 Z. It is unknown the amount, if any, of this paint that will be disturbed during work. Therefore prepare the bid to include the cost per square meter to remove paint containing chromium in accordance with OSHA 1915 Z and all other applicable federal, state, and local regulations. This unit cost will be used to adjust the final contract price based on the actual work.

3.3 Preservation Plan

1. Submit a “Preservation Plan” (PP) to the Contracting Officer's Representative (COR) at the arrival conference, to allow for review of all work items pertaining to the preservation of the vessel. At a minimum, the PP shall include the following and be broken down by work item:

a. Coatings to be applied – listed by manufacturer and product identification numbers

b. Target wet and dry film thickness values

c. Authorized reducers/solvents – including maximum percent by volume for reducers/solvents

d. Colors by FED-STD-595 color number and name

e. Application method for each coat

f. Application pressure and nozzle size requirements listed on the manufacturer’s product data sheet(s)

g. Minimum recoat windows for applying subsequent coats, maximum recoat windows to apply subsequent coats adjusted for anticipated temperatures

h. Any special instructions or environmental limits listed by the coating manufacturer

i. Intended final cure times prior to immersion or full duty rating (as applicable).

3.4 Authorized Coating Systems

1. Unless otherwise specified in the individual work item, or other contract documents, use surface preparation methods and coating systems for all exterior and interior ship surfaces in accordance with USCG 6310 Appendix A and Appendix B. Use Option I, and follow all notes. For the Underwater Body, use the 'Up to 7 year' system.

a. For all touch-ups with an area of less than 10 square feet, use the existing coating

DOCUMENT 00 63 01.00 Page 3 system.

3.4.1 Brand Names

1. Select and furnish coatings in accordance to USCG 6310"Appendix C Cutter and Boat Authorized Coatings". As the authorization process may lag the introduction of new coatings to the marketplace, alternate coatings may be used with pre-approval by the Contracting Officer's Representative (COR).

3.4.2 Paint Colors

1. Exterior paint colors shall be in accordance with NOAA VC 06.

2. Interior paint colors shall match as close as possible to existing, unless otherwise specified in the detail specification or other contract documents.

3.5 Material Procurement and Delivery

1. Furnish all coating materials.

2. Ensure that all procured coating-related materials are delivered to the job site in original and unopened containers, with the following information/documentation:

a. Product manufacturer’s name.

b. Product’s name or number.

c. Batch number.

d. Date of manufacture.

e. Shelf life.

f. Product data sheets or ASTM F718 sheet.

g. Material Safety Data Sheet (MSDS).

3.5.1 Document Submission

1. For all work involving coatings preservation, ensure the following documentation, broken out by work item, is submitted to the Contracting Officer’s Representative (COR) at the Arrival Conference for each coating system intended to be applied:

a. Brand name.

b. Color.

c. Intended mil thickness.

d. Time between coats.

e. Intended final cure time prior to immersion or full duty rating, as applicable.

2. For all work involving coatings preservation, submit all product data sheets, and MSDS, to the COR, prior to commencement of work.

3.6 Material storage, handling, mixing, and application

1. Observe all coating manufacturers’ recommended procedures, as well as the good painting

DOCUMENT 00 63 01.00 Page 4 practice recommendations outlined in SSPC-PA 1, for all aspects involving storage, handling, mixing, and application of paint materials.

3.7 Personnel health and safety compliance

1. Observe all personnel safety protective measures applicable to surface preparation and application of marine coatings, especially as specified in the coating manufacturer’s product data sheets and MSDS.

3.8 Substrate contamination prevention

1. Take extreme care to prevent contamination of prepared surfaces by materials, personnel, and equipment. The Contractor shall provide any required material and equipment (such as disposable boot covers, disposable coveralls, and disposable gloves) to NOAA personnel conducting coating preservation inspections to safeguard the substrate from contamination.

3.9 Ambient condition parameters

1. Ensure that the following ambient condition parameters are strictly adhered to, as applicable, unless otherwise allowed by particular coating system manufacturers:

a. Coating materials must be maintained at a temperature range of 65 to 85°F, at all times.

b. Work surface and surrounding temperature must be between 50 and 90°F, for water-thinned coatings, and 35 and 95°F for other coatings.

c. Coatings must not be applied when the temperature is expected to drop below freezing or below the minimum cure temperature of the applied coating before the coatings cure.

d. Relative humidity must be less than or equal to 50 percent for confined spaces such as forepeak compartments, tanks, and voids; and not more than 85 percent for all other open areas.

e. Coatings shall only be applied only when surfaces are completely dry, and surface temperature is at least 5°F above the dew point.

2. Prior to applying each coat, validate that the ambient condition parameters are met.

Measure and record the dew point by taking the dry-bulb temperature of the surface and the wet-bulb temperature at the jobsite. Use these measurements to look up the dew point on a Mollier diagram or Psychometric chart. Alternatively the dew point can be presumed to be satisfactory if a thin, clearly defined film of water applied to a clean surface with a damp cloth evaporates within 15 minutes.

3.10 Tenting and ambient condition control

1. When the ambient condition parameters necessary for full paint cure or to meet environmental conditions, as required in paragraph Ambient Condition Parameters, cannot be met, provide the following, at no additional cost to the Government:

a. Suitable tenting, as applicable, for exterior surface preservation.

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b. Suitable ambient condition control equipment, which may include, but not be limited to the below-listed, to create and maintain ambient conditions recommended by the coating system’s manufacturer, and facilitate successful coating application and curing.

c. AC system.

d. Heaters.

e. Blowers.

f. Dehumidifiers.

2. Submit an ambient condition control plan to the COR within 24 hours prior to initiating ambient condition control process.

3.11 Pre-Surface Preparation Requirements

1. Prior to beginning all surface preparation procedures, accomplish the following tasks:

3.11.1 Compressed Air Cleanliness Check

1. Check the cleanliness and suitability of the compressed air for all blasting operations, in accordance with ASTM D4285 , at the following instances

a. Prior to the start of blasting operations.

b. When blasting operations have been suspended for a period of time that would permit a temperature change of the compressed air and drier systems.

c. When an equipment malfunction or improper performance is suspected.

3.11.2 Coupon Test

1. In order to ensure production of required surface profile, the Contractor shall accomplish the following tasks whenever abrasive blasting is required in a work item:

a. Conduct a performance test on all abrasive blasting operations on a Contractor-provided test coupon, prior to starting abrasive blasting operations on the vessel. Use a new metal plate, of the same metal type and material properties as the area to be blasted, steel or aluminum plate, as applicable. For steel plates, the new plate shall have the mill scale intact and the plate will be in a Rust Grade “A” condition, per the SSPC-VIS 1 visual standard cards. No existing anchor profile, other than the surface irregularities from the manufacturing process are permitted on the test coupon. The test coupon shall be flat, with nothing welded to the side used for the anchor profile test, no thinner than a 1/8-inch plate and measuring no smaller than 1-foot by 1-foot. The test coupon shall be affixed so as to not permit excessive movement during the performance test.

1. Do not affix the coupon to the vessel. Do not allow the blast media from the performance test to strike the vessel during the test.

2. Ensure that the abrasive blasting operation test on the test coupon is with the very same setup that will be used to blast the vessel. The setup shall include, but is not limited to:

a. The abrasive media to be used (material and media size)

b. Nozzle size and type (straight bore, high velocity nozzle, angle nozzle…)

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c. Delivery rate and pressure settings.

3. Blast a one-square area on one side of the test coupon to the abrasive surface preparation standard specified in the applicable work item and perform an anchor profile test of the blasted surface in accordance with ASTM D4417, method B or C. Notify the COR in advance of the abrasive blasting operation test, to permit the witnessing of the test by appropriate NOAA personnel. Submit a Condition Report documenting the results of the abrasive blasting operation test, that includes at a minimum, the following:

a. Area of the vessel for which the verified setup is applicable.

b. The abrasive media use.

c. The nozzle size and type

d. The delivery rate and pressure

e. The test coupon starting properties (material type and surface conditions).

f. The resultant anchor profile readings from the test.

4. Repeat the abrasive blasting operation test in the following instances:

a. The setup, is changed.

b. The resultant anchor profile readings observed on the vessel are outside the specified anchor profile range.

c. Media is changed from MIL-A-22262 to CID A-A-59316 or vice versa.

d. The supplier of the abrasive blasting media changes, regardless if the new source for the media has the same specifications.

e. When directed by the COR.

5. Ultra-high pressure waterjetting does not create an anchor profile and is exempt from the anchor profile test coupon check.

3.11.3 Weld Splatter Removal

1. Remove all existing weld splatter, using a chipping hammer, spud bar, scraper, or grinder, as applicable.

3.11.4 Surface Contaminant Removal

1. Ensure that water in all surface preparation tasks, including pre-surface preparation wash and water-jetting is of sufficient purity and quality that it does not prevent the surface being cleaned from achieving the required degree of surface cleanliness or non-visible contamination criteria. Ensure that surface preparation water does not contain sediments or other impurities that are destructive to the proper functioning of the cleaning equipment.

2. Perform a low-pressure (maximum 5,000 psi) fresh water wash down of the surfaces, to remove all existing surface contaminants such as sea salts, grease and oil (hydrocarbons), loose rust, mud and marine growth, as applicable, and achieve the cleanliness requirements of SSPC SP 1. (Do not exceed 2400 psi for Foul Release Coatings.) Use vacuum to remove standing water followed by an adequate period of time to allow the surface to dry prior to surface preparation.

3. When fresh water wash is not possible or practical, remove surface contaminants by one or a

DOCUMENT 00 63 01.00 Page 7 combination of solvent cleaning methods in accordance with SSPC SP 1.

3.11.5 Fiberglass Surfaces

1. All fiberglass surfaces shall be prepared as follows:

a. Use wooden or plastic scrapers, mechanically prepare to a bare clean surface, exercising care not to gouge, scratch, or otherwise damage the fiberglass.

b. Using a hand or finishing sander with fine grit paper, remove all remaining marine growth, loose paint, and dirt.

3.11.6 Preconstruction Primer Removal

1. Also known as shop primers, preconstruction primers are used as a temporary coating to protect steel from corrosion during welding, storage, and fabrication. Preconstruction primers shall be removed prior to applying the permanent coating system, except in non-critical interior areas (such as machinery spaces, habitability spaces, etc) if they are intact, uncontaminated, and compatible with the overcoating system.

3.12 During Surface Preparation Requirements

1. During surface preparation by abrasive blasting or waterjetting operations, spot check the existing anchor profile per 500-square feet, in order to 'project' the need to manage the excessive anchor inspect for both excessive and insufficient anchor profiles. When the substrate is prepared by waterjetting, the Contractor shall inspect the substrate for areas of insufficient or excessive anchor profile, both visually and in accordance with ASTM D4417, Method B or C.

2. Submit a Condition Report detailing the location, square footage, measured anchor profiles, and the anchor profile range required for the applicable coating system.

3.13 Post-Surface Preparation Requirements

3.13.1 Surface Cleanliness Evaluation - Visual Standards

1. In the presence of the COR, verify the resultant surface cleanliness level, in accordance with the specified surface preparation standard in conjunction with the associated visual/pictorial guide, as listed in the table below (Surface Preparation Visual Guides).

Surface Preparation Standard Visual Guide

Dry-abrasive blast cleaning:

SSPC-SP 5/NACE No. 1 SSPC-SP 6/NACE No. 3 SSPC-SP 7/NACE No. 4

SSPC-SP 10/NACE No. 2

SSPC-VIS 1

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Surface Preparation Standard Visual Guide

Wet-abrasive blast cleaning:

SSPC-SP 6/NACE No. 3

SSPC SP 10/NACE No 2

SSPC-VIS 5/NACE VIS 9

Hand Tool Cleaning: SSPC-SP 2. Power Tool Cleaning:

SSPC-SP 3

SSPC-VIS 3

Waterjetting:

SSPC-SP WJ-1/NACE WJ-1

SSPC-SP WJ-2/NACE WJ-2

SSPC-SP WJ-3/NACE WJ-3

SSPC-SP WJ-4/NACE WJ-4

SSPC-VIS 4/NACE VIS 7

(Still applicable, although it does not reflect latest waterjetting standards)

3.13.2 Debris Removal and Disposal

1. Completely remove all dust and residues from the prepared surfaces by vacuuming. Do not brush or blow down the surfaces to remove dust and residues. Dispose of generated wastes in accordance with all applicable Federal, state, and local regulations.

3.13.3 Surface Profile Measurements

1. Measure the profile of the resultant bare surfaces, in accordance with ASTM D4417, Method B or C. Submit a Condition Report detailing the location, square footage, measured anchor profiles, and the anchor profile range required for the applicable coating system.

3.13.4 Soluble Salt Conductivity Measurements

1. Measure and document conductivity due to soluble salts, randomly over the prepared surfaces (take 5 measurements every 1,000 square feet or five total measurements for surfaces less than 1,000 square feet), using a suitable surface contamination analysis equipment, in accordance with ISO 8502-9.

3.13.4.1 Soluble Salt Removal

1. If salt conductivity measurements exceed the respective values in the table below (Soluble Salt Maximum Conductivity Threshold), accomplish the following:

a. For surfaces prepared by abrasive-blasting, wash the affected areas with fresh water, with a maximum of 5,000 psi. Remove all standing water, dry, and retest the affected areas. Repeat water-wash and retest until satisfactory levels are obtained.

b. For surfaces prepared by waterjetting, resume waterjetting of affected areas. Remove all standing water, dry, and retest the affected areas. Resume waterjetting and retest until satisfactory levels are obtained.

c. For power tool-cleaned surfaces, circle affected areas and perform spot solvent cleaning (Super High Flash Naphtha) followed by retest. Repeat spot solvent cleaning and retest until satisfactory results are obtained.

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d. For power tool-cleaned surfaces not practical for spot cleaning method, water wash said surfaces with copious amounts of fresh water, using hand scrub brush. Remove all standing water and dry the affected areas. Remove all flash rusting, if any, caused by the water wash by disk sanding affected areas with a #36 disk. Perform an SSPC-SP 1 solvent wipe on all sanded areas and retest. Repeat necessary steps until satisfactory levels are obtained.

SURFACES CONDUCTIVITY

(microsiemens/cm)

Submerged 30

Non-Submerged 70

3.13.5 Hydrocarbon Substance Removal

1. Remove all grease and oil surface contaminants by one or a combination of solvent cleaning methods in accordance with SSPC SP 1.

2. An ultraviolet light source may be used to detect the presence of hydrocarbons; however, for proper detection, artificial lights must be off for interior spaces, and the inspection must be conducted during darkness for surfaces exposed to sunlight. When hydrocarbons are present, the hydrocarbons will fluoresce as bright green, lime green, or blue/violet.

3.13.6 Flash Rust/Surface Oxidation Limitations

1. Limit surfaces being preserved in size to an area that can be prepared and coated before flash rusting/surface oxidation occurs. If flash rusting or oxidation does occur before primer coat application, ensure the following:

a. For surfaces prepared by waterjetting, the rust must be tight and adherent, and not exceed the “WJ-2/L” (Very Thorough or Substantial Cleaning, Light Flash Rusting) or “WJ-2/M” (Very Thorough or Substantial Cleaning, Moderate Flash Rusting) in accordance with SSPC VIS 4/NACE VIS 7.

b. For surfaces prepared by methods other than waterjetting, the rust or oxidation must be completely removed by abrasive-sweeping or mechanical cleaning.

3.14 Use of Contrasting Colors

1. Apply all coats in multi-coat systems, including stripe coats, in contrasting colors.

3.15 Coating Inspections and Tests

1. Inspect each applied paint coat to ensure that there are no misses, skips, runs, sags, overspray, underspray, dryspray, or other visible paint defects that will affect the performance of the coating system. Repair all defects.

2. Test each applied coat at random locations, using the test methods specified in the table below.

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TEST INSTRUMENT SPECIAL INSTRUCTIONS

refer to the following

Wet Film Thickness (WFT) Conventional Notch Type with "teeth" WFT gauge

ASTM D4414

Dry Film Thickness (DFT) Magnetic or Eddy Current Gauge SSPC-PA 2, for ferrous metal base; and ASTM D 7091, for non ferrous metal base

Pinhole/Holiday Detection (Primer coat only)

Low Voltage Holiday Detector ASTM D5162

Pull-off Strength of Coatings (Primer and second coats for all tank and void coatings conforming to MIL-PRF-23236, and primer coats only for all

Portable Adhesion Testers ASTM D4541

3.16 Stripe Coat Application

1. After each primer coat has sufficiently cured for overcoating, apply an un-thinned coat of the same primer coating over all weld seams, edges, and other surfaces with complex geometric shapes – including, but not limited to the following, as applicable:

a. Features in freeboard, superstructure, underwater body, and main deck surfaces:

o Bulwarks.

o Ladder rungs.

o Port lights.

o Doubler plates.

o Hawse piping.

o Spray rails.

o Rub rails.

o Chocks and cleats.

o Deck machinery and fittings.

o Hull markings (i.e. draft marking, emblem locators…).

o Vents and overboard discharges.

o Stiffeners, supports, and brackets.

o Detacouples.

b. Foot/hand holds (including inaccessible areas, such as back side of piping, under side of I- beams), and other mounting hardware (non-flat surface).

2. Apply stripe coating at three to four mils wet film thickness (WFT), ensuring that the coating encompasses all edges, as well as at least one-inch border outside each edge, and is neat in appearance. Minimize extra thickness applied to edges, as well as streaks and drops of paint.

3. For multi-coat systems with inorganic zinc as the primer coat, apply the stripe coat following the mist coat application, using the same coating used for the mist coat.

3.17 Underwater Body Coating

1. When surface preparation and coating of the underwater body is specified, include the entire underwater hull plating and all appendages up to the upper boot-topping limit. Included are all

DOCUMENT 00 63 01.00 Page 11 rudders, struts, skegs, bilge keels, sea chest strainer plates, sea chests, domes, propulsion shafting, bow thruster tunnels, fairwaters, and rope guards.

2. Protect from damage or contamination during surface preparation and coating application all hull openings, transducers, anodes, waster pieces, bearings, stern tube openings, bow thrusters, fiberglass covers (over shafts and domes) and propellers.

a. Remove all sea strainer plates.

b. Cover fiberglass surfaces.

c. Cover all transducer faces with plywood covers.

d. Cover all zinc or aluminum anodes.

3. All potential structural steel repairs, access cuts, NDT testing, and hull plate inserts below the waterline, in other items of these specifications, shall be completed prior to applying the underwater body coating system.

4. NOAA antifoulant systems are modifications of requirements in MIL-PRF-24647 to provide up to 7 or 12 year systems with periodic touch up on a 2-5 year drydock cycle. The second coat of anticorrosive epoxy and the antifoulant are applied over the previous coat of epoxy while still tacky, which is defined as that curing (drying) stage when a fingertip pressed lightly against the film leaves only a slight impression and none of the film sticks to the finger.

5. For NOAA ships painted with ablative paint, when drydocking for repainting, the COR will inspect the hull and designate the defective areas to be prepared and touched up with epoxy.

The entire hull should never be taken down to bare metal unless the entire bottom coat has failed or failure is inevitable in the immediate future.

a. The actual scope of hull paint work will not be known until after the hull inspection.

Therefore, bid using the following most-probable allowances. The bid must include unit cost per non-continuous area for each of the two allowance types. Unit costs shall be used to adjust (upward or downward) the final contract price based on the deviation of the actual work from the allowances.

1. Allow for ten (10) non-contiguous areas of 10 square meters each requiring surface preparation to an SSPC-SP 7/NACE No. 4 and application of top coat below the anti-fouling.

2. Allow for six (6) non-contiguous areas of 1 square meter each requiring preparation to an SSPC SP 10/NACE No. 2 or SSPC SP 12/NACE No.5 WJ-2 finish and application of primer, undercoat, and top coat below the antifoul.

6. All paint materials shall be applied using spray equipment, except sea chest strainer plates shall be coated by dipping.

7. After the last coat of anti-fouling paint has been applied, the underwater body draft marks shall be repainted, with brushes, using a high grade white gloss marine paint.

3.18 Antifouling Coating Freeboard to Underwater Body Interface

1. To prevent corrosion and coating delamination at the freeboard-U/W body interface, ensure

DOCUMENT 00 63 01.00 Page 12 the following measures are taken when both the freeboard and underwater body surfaces are being 100% preserved:

a. Extend the Freeboard Anticorrosive System (FB AC SYS) downward by approximately 3-4 inches beyond the top of the boot-topping or the water line (which ever term is applicable to the specified interface between the underwater body and freeboard). The FB AC SYS would consist of: 1) single coat of Zinc-Rich Primer, 2) one coat of Zinc-Rich Primer and one coat of Epoxy Primer/Midcoat, or 3) two coats of Epoxy Primer/Midcoat depending on the specified topside coating system.

b. Apply the first coat of the Underwater Body/Boot-top Anticorrosive Epoxy (UWB AC1) over the FB AC SYS so that it overlaps by approximately 3-4 inches.

3.1.12.3 Apply the Freeboard Topcoat System (FB TC SYS) over the UWB AC1 so that it overlaps by approximately 3-4 inches. The FB TC SYS would consist of one or two coats of Polysiloxane or Silicone Alkyd depending on the specified topside coating system.

c. Apply the second coat of the Underwater Body/Boot-top Anticorrosive Epoxy (UWB AC2) over the FB TC SYS so that it ends at the specified top of the boot-topping or the water line (which ever term is applicable to the specified interface between the underwater body and freeboard).

d. Apply the Underwater Body/Boot-top Antifouling Coating System (UWB AF SYS) over the UWB AC2 so that it ends at the specified top of the boot-topping or the water line (which ever term is applicable to the specified interface between the underwater body and freeboard). The UWB AF SYS consists of one or more coats of antifouling coating as required by the specified antifouling coating system. No antifouling coatings shall be applied in between the freeboard or underwater body anticorrosive coatings.

3.19 Touch-Ups and Minor Coating Repairs

1. When performing touch-ups or minor coating repairs, adhere to the following guidelines:

a. Each area identified for touch-up preservation shall include the area itself and all attached framing, stiffeners, brackets, mounting plates/frames, pad eyes, ducting, piping, equipment support, etc., as applicable, up to a minimum of three inches adjacent to the area to be painted.

b. The total area designated shall account for the three-inch boundary segment wherein the repair is faired into the surrounding intact coating system.

2. Prepare surfaces in which mechanical damage extends into the substrate to bare metal in accordance with SSPC SP 11 providing a minimum 1.0 mil anchor pattern using suitable tools listed in SSPC SP 11. Feather surrounding intact coating into the prepared areas, to create a smooth transition. Intact coatings are considered adherent if they cannot be removed by lifting with a dull putty knife. Roughen all painted surfaces, to provide a suitable surface profile.

3. Abrade areas where primer coat is exposed with 100-grit paper, and feather back to firm edge of existing topcoat finish.

4. Perform solvent cleaning of all surfaces, in accordance with SSPC SP 1.

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5. Hand brush, or in larger areas airless-spray apply applicable coatings, to match existing adjacent areas.

6. Substitute epoxy or organic zinc primers for inorganic zinc primers, when applicable, for steel surfaces.

3.20 Overcoating Cautions

1. Strictly abide by the coating system manufacturer's recommendations to ensure proper inter-coat adhesion when performing overcoating. Ensure the following:

a. Overcoating window is not exceeded.

b. Undercoating system is properly prepared, when overcoating window is exceeded.

c. Rules for tie-coat application or tacky undercoating are followed, when overcoating an existing coating with a top-coating of different chemistry (e.g.: overcoating inorganic zinc with epoxy, or overcoating epoxy with antifouling top-coating).

3.21 Ventilation Requirements for Confined Spaces

1. During preservation of confined spaces (confined spaces such as Forepeak Compartments, voids, tanks…), ensure that ventilation equipment are in place and operating prior to the start of surface preparation, to create one complete air change every four hours. Use “net exhaust” (negative pressure mode) ventilation when the ventilation trunk(s) run through interior compartments intended for normal human occupation such as berthing areas, passageways, and workspaces. In addition, ensure the following:

a. Ventilation system remains in place and energized during the application of the coating system, from the initial coating application through the final coating application and cure.

b. Ventilation ductwork shall be placed at the bottom most location where vapors will accumulate in pockets and a complete exhaust of solvent vapors is achieved.

2. Failure to maintain proper ventilation in enclosed spaces during preservation may result in solvent entrapment, which then may lead to delay in coating cure or outright failure of coating to cure.

3.22 Critical Drying Time Requirements

1. Ensure that all coating system cure times (including for touch-up preservation) are in accordance with manufacturer's recommendation for intended service.

2. Painting and curing of all tank coating systems (except for tanks that are inboard and not touching the skin of the vessel (side and/or bottom) shall occur while the ship is out of the water.

3. Active Cathodic Protection Systems shall not be energized until full cure of all underwater paint systems has occurred.

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3.22.1 Potable and Feed Water Tank Systems

1. For potable and feed water tanks, ensure that the coating manufacturer’s technical guidance is followed - to include but not limited to: ventilation requirements, application temperatures, thru coat times, final cure times, and hold time before placing tank into immersion service. If ventilation requirements are not provided by the coating manufacturer, the ventilation requirements in paragraph "Ventilation requirements for confined spaces" shall be the minimum requirements.

2. Maintain and record tank temperatures during the application of the coating system from initial coat to the final cure, applying heat as required.

3. Ensure that ventilation is maintained from final cure thru the minimum hold time before placing the tank back in service.

4. For touch-up preservation, abide by the coating manufacturer’s recommendations or observe the following curing requirements – whichever is more stringent:

a. 24 hours between coats and 24 hours (@ 77 degrees F), if the largest single touch-up area is less than one square foot, and the cumulative total touch-up area is less than four square feet.

b. 24 hours between coats and 48 hours (@ 77 degrees F), if the largest single area is between one and two square feet, and the cumulative total touch-up area is less than ten square feet.

c. 24 hours between coats and minimum seven full days (@ 77 degrees F), if any single area is greater than two square feet.

3.22.2 Underwater body antifouling systems

1. For underwater body antifouling systems, ensure that the paint manufacturer's minimum curing time is met before the vessel is re-floated.

PART 4 QUALITY ASSURANCE

4.1 Paint Manufacturer's Representative

1. Provide the on-site services of a manufacturer's representative for the coating system being applied. The representative shall be on-site during all mixing and application of paint, and shall conduct or witness all inspections. All surface preparation and other aspects of the coating system application shall be acceptable to the paint manufacturer's representative.

4.2 Preservation Plan

1. If the surfaces to be coated exceed a total surface area of 10 square-feet, then prior to commencing with surface preparation:

a. Prepare and submit to the COR a written "Preservation Plan" in accordance to the

DOCUMENT 00 63 01.00 Page 15 paragraph in this specification entitled "Preservation Plan".

b. Conduct a meeting with the paint foreman, paint manufacturer's representative, and the COR to discuss and review the "Preservation Plan".

4.3 Paint Records and Report

1. During the painting process measure and record the following information:

a. Actual number of gallons of each type of paint used.

b. Certification by the Paint foreman and paint manufacter's representative that the environmental conditions required were maintained during application and curing of the paint. Record measurements of wet-bulb temperature at the job site and dry-bulb temperature of the surface taken before applying each coat of paint.

c. Date and time that each coat of paint was started and completed.

d. Complete set of all Coating System Test measurements (such as DFT, Holiday, etc)

2. Within 24 hours after completion of final coat curing, provide the COR with a written report that includes all the paint records.

4.4 Inspections

1. 1.3.1 Conduct inspections with the COR and the paint manufacturer's representative at the following checkpoints:

a. Prior to surface preparation or painting:

1. Prove all protective coverings and masking are adequate to prevent damage to the ship or government equipment.

b. After completion of surface preparation and prior to application of the first coat of paint:

1. Inspect the surface. Prove the conditions meet the surface preparation requirements.

2. Prove the environmental condition requirements for painting are met.

c. After each coat of paint, and prior to the next coat:

1. Calibrate the magnetic gauges used to measure the paint thickness.

2. Take and record paint thickness DFT measurements and other Coating Inspection and Tests required in 3.15 above.

3. Prove the environmental condition requirements for painting are met.

2. Provide the COR 4 to 24 hours advance notice of the inspection date and time. In the event the COR, or other person specified by the COR, is unable to witness the required inspections, and the required 4 to 24 hour advanced notice was provided, proceed with the inspection or measurement.

3. Document the inspection or measurements as required by the Paint Records and Report requirements above.

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PART 5 NOTES

1. None.

PART 6 APPENDIX A NOAA SHIP EXTERIOR PAINTING SYSTEMS

This appendix presents the required coatings for various exterior areas and components of NOAA ships and boats.

The coating systems for each area are presented in tabular form. The tables include the surface preparation, primer, intermediate coats if any, and topcoat.

The various coatings used for a particular application should be regarded as a system. The coating system shall be obtained from a single manufacturer to ensure that the individual components are compatible and to maximize performance. Thickness references apply to the dried film and are abbreviated as DFT (dry film thickness).

PART 7 APPENDIX B NOAA SHIP INTERIOR PAINTING SYSTEMS

This appendix presents the required coatings for various interior areas and components of NOAA ships and boats. Subject matter in this chapter is listed alphabetically.

The coating systems for each area are presented in tabular form. The tables include the surface preparation, primer, intermediate coat if any, and topcoat.

The various coatings used for a particular application should be regarded as a system. The coating system shall be obtained from a single manufacturer to ensure that the individual components are compatible and maximize performance. The thickness references apply to the dried film and are abbreviated as DFT (dry film thickness).

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