Attachment 04-Sherwin Williams Guidance.pdf

SHERWIN-WILLIAMS GUIDANCE

WATER TANK COATING SYSTEM

PART 1 GENERAL

1.01 SUMMARY

A. Section Includes:

1. Work under this section consists of surface preparation, 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

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

8. SSPC-SP11 Specification for Power Tool Cleaning to Bare Metal SSPC-SP15 Specification for Commercial Power Tool Cleaning

9. SSPC-PA1 Painting Application Specification

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

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

12. 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:

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.

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

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, other brands are acceptable as long as they meet the minimum standard.

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.

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.

6. The use of NSF 61 acceptable preconstruction primers on steel plate is recommended. See AWWA D102 “Coating Steel Water-Storage Tanks” Section 4.3.1.1 & 4.3.1.2.

7. For Composite Elevated Tanks (CET’s), a system is available to coat the concrete pedestal. See Section 2.02a below.

Exterior – Over Coat Coating System-Surface Tolerant Primer, UV Resistant Epoxy:

Surface Preparation: Remove all visible oil, dirt, chalk and other soluble contaminants in accordance with per SSPC SP-1 WJ-4 Light Cleaning. All exterior surfaces shall be

1542834672C Highlight power tool cleaned or brush blasted per SSPC SP-7, removing all existing loose paint, rust,mill scale and foreign matter by the recommended methods outlined in The Society for Protective Coatings. Be sure to remove ALL existing coatings down to a sound bond.

Prime Coat: Apply Sherwin-Williams Macropoxy 920 Pre Prime to the entire tank. This coating shall be applied at a dry film thickness of 1.5 to 2.5 mils.

SpotPrime/Stripe Coat: Apply one coat to all bare steel, tightly adherent rust spots , a coat of Sherwin Williams MacroPoxy 5500 LT NSF Epoxy at a dry film thickness of 2.0 to

4.0 mils.

Intermediate Coat: Apply one coat of Macropoxy 5500 LT NSF Epoxy 4-6 mils DFT

Finish Coat: Apply one complete coat of Sherwin Williams Sherloxane 800 UV Resistant Epoxy at a dry film thickness of 4.0 to 6.0 mils. Color shall be selected by the Owner.

Logo: Apply one complete coat of Sherwin Williams Sherloxane 800 UV Resistant Epoxy at a dry film thickness of 4.0 to 6.0 mils.

INTERIOR - AWWA D102 ICS No. 2 Epoxy Primer, Epoxy Intermediate, Epoxy Topcoat

Surface Preparation: Clean all surfaces per SSPC SP-10 Near White Blast surface prep. The surface shall be clean and dry before painting.

Primer: Apply Sherwin Williams Macropoxy 5500 LT NSF Epoxy Primer Beige 4-6 mils DFT

Stripe Coat: Apply by Brush Sherwin Williams Macropoxy 5500 LT NSF Epoxy White @ 3.0 –

5.0 dry mils DFT per coat.

Intermediate Coat: Sherwin Williams Macropoxy 5500 LT NSF Epoxy Blue 4-6 mils DFT

Topcoat: Sherwin Williams Macropoxy 5500 LT NSF Epoxy White 4-6 mils DFT

Total required Dry Film Thickness 10.5 – 15.5 mils

*Identifying Color change between coats required

2.03 PIT FILLING

A. 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

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 days 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.

2. Ferrous Metal Surfaces:

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

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. 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.

C. 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 D102-2011, Section A.7.6.

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.

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

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.

Submit copies of report to Engineer and General Contractor.

B. 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. Special attention to be taken to contain blast media during blasting, and protect surroundings for overspray and coating drips. It is the applicators responsibility to maintain a clean and safe worksite daily. All blast media, coating removed, material buckets, supplies, and all other construction supplies and debris shall be removed from the job site by the end of the job. Federal, State, and Local laws of proper waste removal must be observed.

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.

Coating Manufacturer Contact: Allan Haynes Sherwin Williams Water and Waste Water Specialist. 843-214-3265. allan.c.haynes@sherwin.com

END OF SECTION