Attachment 0013 - PBA Steel Tank Maintenance Specifications.pdf

PINE BLUFF ARSENAL

ELEVATED STEEL WATER TANKS COATING SYSTEM

Pine Bluff Arsenal January 2024 Elevated Water Storage Tank Coatings Page 1 of 10

PART 1 GENERAL

1.01 SUMMARY

A. Section Includes:

1. Work under this section consists of surface preparation, spot field priming and field painting necessary to complete work.

2. Use coating systems specified in this section to finish all water tank components, unless otherwise indicated. Without restricting volume or generality, work to be performed under this section may include, but is not limited to:

a. Exterior steel

b. Interior steel

c. Piping, hangers, and supports

1.02 REFERENCES

List of standards that may be referenced in this section, complete with designations and titles.

These standards may be identified here and referenced in other parts of this section by their acronym and alpha/numeric designation only. This Section does not require compliance with these standards, but is merely a listing of those that may be referenced.

A. Publications listed are part of this specification to extent referenced.

B. ASTM International:

1. ASTM D16 Terminology Relating to Paint, Varnish, Lacquer, and Related

Products

2. ASTM D3359 Test Method for Measuring Adhesion by Tape Test

3. ASTM D4263 Test Method for Indicating Moisture in Concrete by the

Plastic Sheet Method.

4. ASTM D4541 Test Method for Pull Off Strength of Coatings Using

Portable Adhesion-Testers

5. ASTM D1005 Test for determining dry film thickness

6. ASTM D4417 Test for determining surface profile

7. ASTM E2501 Light Source Products for Inspection of Fluorescent

Coatings

C. The Society for Protective Coatings:

1. SSPC-SP1 Specification for Solvent Cleaning

2. SSPC-SP2 Specification for Hand Tool Cleaning

3. SSPC-SP3 Specification for Power Tool Cleaning

4. SSPC-SP5 Specification for White Metal Blast Cleaning

5. SSPC-SP6 Specification for Commercial Blast Cleaning

6. SSPC-SP7 Specification for Brush-Off Blast Cleaning

Elevated Water Storage Tank Coatings Page 2 of 10

7. SSPC-SP10 Specification for Near White Metal Blast Cleaning

8. SSPC-SP11 Specification for Power Tool Cleaning to Bare Metal

9. SSPC-SP15 Specification for Commercial Power Tool Cleaning

10. SSPC-PA1 Painting Application Specification

11. SSPC-PA2 Measurement of Dry Paint Thickness with Magnetic Gages

12. SSPC-SP12 Surface Preparation … by High and Ultra-High Pressure

13. SSPC-TU11 Inspection of Fluorescent Coating Systems

1.03 DEFINITIONS

A. The term Paint shall in a general sense have reference to zinc primers, acrylic, polyurethane and epoxy type coatings and application of these materials.

B. Dry Film Thickness (DFT): Thickness, measured in mils (1/1000 inch), of a coat of paint in cured state.

1.04 SUBMITTALS

A. Product Data:

1. Submit manufacturer's literature describing products to be provided, giving manufacturer's name, product name, and product line number for each material.

2. Submit technical data sheets for each coating, giving descriptive data, curing times, mixing, thinning, and application requirements.

3. Submit color charts showing manufacturer’s full range of standard colors.

B. Quality Assurance Submittals:

1. Certificates:

a. Provide manufacturer's certification that products to be used comply with specified requirements and are suitable for intended application.

b. Submit listing of not less than 5 of applicator's most recent applications representing similar scope and complexity to Project requirements. List shall include information as follows:

i) Project name and address

ii) Name of owner

iii) Name of contractor

iv) Name of engineer

v) Date of completion

2. Manufacturer's Instructions:

Elevated Water Storage Tank Coatings Page 3 of 10

a. Submit manufacturer's installation procedures, if not on product data sheets, which shall be basis for accepting or rejecting actual installation procedures.

1.05 QUALITY ASSURANCE

A. Qualifications:

1. Applicator shall be trained in application techniques and procedures of coating materials and shall demonstrate a minimum of 5 years successful experience in such application.

a. Maintain, throughout duration of application, a crew of painters who are fully qualified.

2. Single Source Responsibility:

a. PAINT shall be of a single manufacturer.

b. Secondary materials, which are produced or are specifically recommended by coating system manufacturer, may be used.

B. Pre-Installation Meeting:

1. Schedule a meeting to be held on-site before field application of coating systems begins.

2. Meeting shall be attended by Contractor, Owner's representative, Engineer, Coating Applicators, and Manufacturer’s representative.

3. Topics to be discussed at meeting shall include:

a. A review of Contract Documents and deviations or differences to be resolved.

b. Environmental conditions, surface conditions, surface preparation, application procedures, and protection following application.

c. Which areas on-site will be available for use as storage and working areas.

d. Prepare and submit, to parties in attendance, a written report of pre-installation meeting. Report shall be submitted within 3 days following meeting.

Elevated Water Storage Tank Coatings Page 4 of 10

1.06 DELIVERY AND STORAGE

A. Packing and Shipping:

1. Deliver products in manufacturer's original unopened containers. Each container shall have manufacturer's label, intact and legible.

2. Include on label for each container:

a. Manufacturer's name

b. Type of paint

c. Manufacturer's stock number

d. Color name and number

e. Instructions for thinning, where applicable

B. Storage and Protection:

1. Store materials in a designated protected area in accordance with Product Information instructions.

1.07 PROJECT CONDITIONS

A. Environmental Requirements:

1. Apply coating materials per manufacturer’s printed data sheet instructions:

a. Refer to specific product data sheets for minimum surface temperature requirements. Surface temperatures shall be at least 5 degrees F above dew point and in a rising mode.

b. Provide for proper ventilation using explosion proof equipment.

Allow to operate during the complete cure cycle of the coating

c. Adequate illumination shall be provided using explosion proof lights and equipment.

d. Atmosphere shall be free of airborne dust.

PART 2 PRODUCTS

2.01 ACCEPTABLE MANUFACTURERS

A. This specification lists products manufactured by The Sherwin Williams Company, Protective & Marine Division. Materials specified are cited as minimum standard of quality, which will be acceptable.

B. Materials specified shall not preclude consideration of equivalent materials.

Equivalent materials shall be submitted to Engineer for consideration and shall be made at least ten (10) days prior to the date of bids.

Elevated Water Storage Tank Coatings Page 5 of 10

1. Requests for substitution shall include evidence of satisfactory past performance on water tanks.

2. Substitutions will not be considered that change the number of coats, do not meet specified total dry film thickness.

3. Coating system performance information, supplied by an ISO-certified laboratory, may be required prior to acceptance.

4. Contractor shall state in the bid the amount of deduct to use equivalent materials to those specified.

5. Paints for interior wet applications must be certified by NSF International or UL Classified water quality and certified for potable water contact in accordance with ANSI/NSF 61/600.

2.02 COATING MATERIALS

REPAINT – STEEL WATER STORAGE TANK

Exterior – (Commercial Blast) Zinc/Epoxy/Polyurethane Coating System:

Scope: The following Commercial Blast specifications apply to maintenance repainting of existing tanks when the existing coating system is completely removed by abrasive blast cleaning. This system exceeds the requirements of AWWA D102 Outside Coating System (OCS) No. 6.

Surface Preparation: Remove all visible oil, dirt and other soluble contaminants in accordance with SSPC-SP1. All exterior surfaces shall be Commercial Blast Cleaned, removing all existing paint, rust, dirt, mill scale and foreign matter by the recommended methods outlined in The Society for Protective Coatings specification SSPC-SP6 (NACE No. 3). A surface profile of 1.5 to 2.5 mils is required.

Prime Coat: Immediately after blasting and before any rusting occurs, apply one coat of Sherwin Williams Corothane I Galvapac 1K Zinc Primer (B65G Series) or Equal primer to all bare steel surfaces. This coating shall be applied at a dry film thickness of 2.5 to 3.5 mils.

Intermediate Coat: Apply one complete coat of Sherwin Williams Macropoxy 646 Epoxy (B58 Series) or Equal at a dry film thickness of 3.0 to 4.0 mils. To achieve complete finish coat hiding, the intermediate coat color should be noticeably different than the specified finish coat color. When feasible, the field intermediate coat should be in the same finish coat color family (blue, beige, etc.)

with a difference in light reflectance value of about 10%.

Finish Coat: Apply one complete coat of Sherwin Williams Hi-Solids Polyurethane (B65 Series) or Equal at a dry film thickness of 2.0 to 3.0 mils. The Engineer/Owner shall select color. Certain finish coat colors may require two-

Elevated Water Storage Tank Coatings Page 6 of 10 coats depending upon the method of application and color of the intermediate coat.

Interior (Near White Blast) Zinc/Epoxy/Epoxy Coating System with OAP Option:

Scope: The following Commercial Blast specifications apply to maintenance repainting of existing tanks when the existing coating system is completely removed by abrasive blast cleaning. This system exceeds the requirements of the AWWA D102 Inside Coating System (ICS) No. 5.

Surface Preparation: Remove all visible oil, grease, soil, dirt and other soluble contaminants in accordance with SSPC-SP1. The entire surface shall be Near White Blast Cleaned by the recommended methods outlined in The Society for Protective Coatings Specification SSPC-SP10 (NACE No. 2).

Prime Coat: Immediately after blasting and before any rusting occurs, apply one coat of primer Sherwin Williams Corothane I Galvapac 1K/2K Zinc Primer (B65G Series) or Equal to all bare surfaces. This coating shall be applied to a dry film thickness of 2.5 to 3.5 mils.

Stripe Coat: Apply by brush or roller to all weld seams, structural edges and bolted connections a stripe coat of Sherwin Williams Macropoxy 5500, SherPlate 600 Epoxy with OAP (B58 Series), or Equal.

Intermediate Coat: Apply one complete coat of Sherwin Williams Macropoxy 5500, SherPlate 600 Epoxy with OAP (B58 Series), or Equal at a dry film thickness of 4.0 to 6.0 mils. Color to contrast with primer and finish coats.

B58VX745 hardener with Opti-Check OAP pigment technology is recommended for rapid holiday detection with a safe ASTM E2501 light.

Finish Coat: Apply one complete coat of Sherwin Williams Macropoxy 5500, SherPlate 600 Epoxy (B58 Series), or Equal at a dry film thickness of 4.0 to 6.0 mils.

2.03 PIT FILLING

Pits, if any, shall be addressed by back-rolling or pit filling to produce a holiday free coating. Shallow pits, (typically up to 25% of steel thickness) can be made holiday free by back rolling the coating after it has been spray applied. Deeper pits shall be filled with a pit filler, such as Steel Seam FT 910 to eliminate holidays.

2.04 ACCESSORIES

Elevated Water Storage Tank Coatings Page 7 of 10

A. Coating Application Accessories:

1. Provide application accessories as indicated in coating manufacturer's application instructions, including but not limited to cleaning agents, etching agents, cleaning cloths, sanding materials, and clean-up materials.

2. Material not specifically identified, but needed for proper application shall be of a quality not less than specified products.

2.05 MIXING Instructions: Specific product mixing and thinning instructions are to be found in the manufacturer’s printed data sheets.

PART 3 EXECUTION

3.01 EXAMINATION

A. Site Verification of Conditions:

1. Examine areas and conditions under which application of coating systems shall be performed for conditions that will adversely affect execution, permanence, or quality of coating system application.

2. Correct conditions detrimental to timely and proper execution of Work.

3. Do not proceed until unsatisfactory conditions have been corrected.

4. Commencement of installation constitutes acceptance of conditions and responsibility for satisfactory performance.

3.02 PREPARATION

A. Protection:

1. Take precautionary measures to prevent fire hazards and spontaneous combustion. Remove empty containers from site at completion of each day’s work.

2. Provide drop cloths, shields, and other protective equipment.

3. Protect elements surrounding work from damage or disfiguration.

4. As Work proceeds, promptly remove spilled, splashed, or splattered materials from surfaces. Leave storage area neat and clean at all times.

B. Surface Preparation:

1. General Requirements:

a. Prior to application of PAINT, surfaces shall be prepared to receive specified paintings system in compliance with these specifications.

b. Surfaces to be coated shall be clean, dry and free from dust and any foreign matter that might adversely affect adhesion or appearance.

Elevated Water Storage Tank Coatings Page 8 of 10

2. Ferrous Metal Surfaces:

a. Field welds and touch-ups shall be prepared to conform to specified surface preparation standards.

3. Galvanized Steel Surfaces:

a. Solvent clean metal to remove contamination and oils in compliance with SSPC-SP1.

b. Brush blast to abrade the surface.

3.03 APPLICATION

A. General Requirements:

1. Apply coating systems in compliance with manufacturer's instructions and using application method best suited for obtaining full, uniform coverage and hide of surfaces to be coated.

a. Work shall be implemented in compliance with applicable sections of AWWA D102 latest revision.

2. Apply primer, intermediate, and finish coats to comply with wet and dry film thicknesses and spreading rates for each type of material as recommended by manufacturer and in accordance with SSPC-PA2.

3. Number of coats specified shall be minimum number acceptable. Apply additional coats as needed to provide a smooth, even application.

a. Closely adhere to re-coat times recommended by manufacturer.

Allow each coat to dry thoroughly before applying next coat.

Provide adequate ventilation for tank interior to carry off solvents during drying phase.

4. Employ only application equipment that is clean, properly adjusted, and in good working order, and of type recommended by coating manufacturer.

5. After surface preparation, spot primer on interior weld seams shall be brush applied.

B. Environmental Conditions

1. It shall be the responsibility of the Contractor to assure that all coating materials are stored, mixed, applied and cured within the environmental conditions specified on the coating manufacturers published data sheets.

2. Any environmental controls such as; supplemental heat or dehumidification during coating application and/or curing, or supplemental heat in the coating storage area which are required to comply with the coating manufacturers requirements, shall be provided by the Contractor at no additional cost to the Owner.

a. Supplemental heat for coating application or curing shall be from indirect fired heaters so that no additional moisture or CO2 introduced into the tank.

Elevated Water Storage Tank Coatings Page 9 of 10

C. Thinning: Thinning requirements for specified products are to be found in the paint manufacturer’s printed data sheets and are to be strictly adhered to.

D. Curing, Disinfection and Filling of Tank:

1. Provide adequate ventilation for proper drying and curing of paint on interior surfaces and which will remove solvent vapors. For solvented coatings, provide ventilation during coating evaporation stage in confined or enclosed areas in accordance with AWWA D102-2017, Section A.8.7.

Forced air ventilation shall be maintained for a minimum of four (4) days following interior coating application to assist in the curing process.

2. Following final application, tank shall not be disinfected or filled until coating system is fully cured.

3. Refer to applicable product data sheet(s) for dry time/temperature requirements. Disinfection (if specified) shall be in compliance with AWWA C652, or as instructed by Engineer.

3.04 REPAIR/RESTORATION

A. At completion of Work, touch-up and restore finishes where damaged.

B. Defects in Finished Surfaces:

1. When stain, dirt, or undercoats show through final coat, correct defects and cover with additional coats until coating is of uniform finish, color, appearance and coverage.

C. Touch-up of minor damage shall be acceptable where result is not visibly different from surrounding surfaces. Where result is visibly different, either in color, sheen, or texture, recoat entire surface.

3.05 FIELD QUALITY CONTROL

A. Required Applicator Inspections and Documentation:

1. Verify coatings and other materials are as specified.

2. Verify environmental conditions are as specified.

3. Verify surface preparation and application are as specified.

4. Verify DFT of each coat and total DFT of each coating system are as specified using wet film and dry film gauges. DFT’s shall be measured in accordance with SSPC-PA2.

5. Coating Defects:

a. Check coatings for film characteristics or defects that would adversely affect performance of coating systems.

b. Check exterior finish for film characteristics or defects that adversely affect appearance.

Elevated Water Storage Tank Coatings Page 10 of 10

c. Check for holidays on steel immersion surfaces using a holiday detector in accordance with NACE SP0188-06.

B. Report:

1. Prepare inspection reports daily.

2. Submit written reports describing inspections made and actions taken to correct nonconforming work.

3. Report nonconforming work not corrected.

4. Submit copies of report to Engineer and General Contractor.

C. Manufacturer's Service:

1. A representative of the paint manufacturer shall be available to provide on-site technical assistance, and guidance for application of the paint system as needed.

3.06 PROTECTION

A. Protect painted areas against damage until paint system is fully cured

3.07 ONE YEAR ANNIVERSARY INSPECTION

A. Owner shall set a date for a one year inspection.

B. Owner will be responsible for draining the tank prior to the inspection. Owner will be responsible for system operation and pressure maintenance during the inspection and repair, if any.

C. Inspection will be attended by an owner’s representative, engineer, and painting contractor.

D. Repair deficiencies in coating systems as determined by Engineer in accordance with Coating Manufacturer's instructions.

END OF SECTION