app d painting specifications

8/10/2019 App d Painting Specifications

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Coos County OregonBid Documents for the Natural Gas Pipeline Project

Revised 1/10/03 Page D-1Coos County Bid Documents App D Painting Specifications.doc

Appendix D:Painting Specifications

1.0. SCOPE

This specification covers the minimum requirements for the selection of paintsystems, the purchase of material, surface preparation, and the application ofcoatings for pressure vessels, heat exchangers, mechanical equipment, andstructural steel which are fabricated and/or erected either in a vendors shop or inthe field.

1.1. Section 9.0 of this Appendix contains a Paint Schedule whichsummarizes coating requirements.

1.2. Section 9.1 of this Appendix gives the color scheme.

1.3. Galvanizing is outside the scope of this specification.

1.4. Paint for buildings, concrete, or masonry is outside the scope of thisspecification.

1.5. This specification does not apply to items that are purchased with amanufacturers standard coating unless provisions have been madeotherwise in the purchase order.

2.0. GENERAL REQUIREMENTS

2.1. All coating of steel surfaces shall be performed in accordance withStructural Steel Painting Council (SSPC) Paint Application SpecificationSSPC-A1 for Shop, Field, and Maintenance Painting, and the coatingmanufacturers recommendations.

2.2. Maximum temperatures which are higher than normal operatingtemperatures (e.g. such as steam out or catalyst regeneration conditions)shall be considered in specifying the coating system to be used.

3.0 MATERIALS

3.1. No material substitutions will be allowed without written approval fromCounty (Project Advisors).

3.2. Paint and coating materials shall be delivered in unbroken, originalpackages leaving the manufacturers name and material designation. Allmaterials shall be applied in accordance with the individual manufacturersrecommendation.


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3.3. The prime coat materials shall be as specified in Section 9.0 of thisAppendix and shall be applied by brush or spray.

3.4. The finish coat shall be as specified in Section 9.0 of this Appendix. Inthe event that thinners or retarders are necessary, the wet film thickness must

be increased proportionally to produce the correct dry film thickness. Anytinting material used shall be compatible with the paint system and shall notbe detrimental to its service life.

3.5. The paints and coating materials as shown in Section 9.0 of thisAppendix have been selected to set a standard of quality. Primers and finishcoats should be by the same manufacturer or of proven compatible materialsfor adjacent coats.

4.0. SURFACES TO BE PAINTED

4.1. The surfaces to be coated will generally exist in one of the followingconditions:

4.1.1 Bare surfaces which require cleaning, surface preparation andcoating.

4.1.2 Shop prepared and coated surfaces which have been damagedand require spot surface preparation and coating.

4.2. Items to be painted include, but are not limited to, the following:

4.2.1 All un-insulated carbon steel and low alloy piping, pressure vessels,heat exchangers, storage tanks, drums, towers, etc.

4.2.2. All insulated carbon steel and low alloy piping, pressure vessels,heat exchangers, storage tanks, drums, towers, etc., with operatingtemperatures of 50OF to 250OF (prime coat only).

4.2.3. Heaters, boilers, ducts and stacks.

4.2.4 All structural steel, except that which is galvanized.

4.2.5 Pumps, compressors and other machinery and equipment,including factory painted items, that are not properly finished.

4.2.6 Fire proofed carbon steel surfaces (only prime coat is required).

4.3 Certain equipment (pumps, compressors, motors, instruments, electricalitems, etc.) that are supplied with manufacturers standard finish paint will not


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require field painting except for repair of damaged surfaces and to provide thedesired finish color.

5.0. SURFACE PREPARATIONS

5.1. The following surface finishes referenced in this specification aredefined in SSPC Paint Application Specification SSPC PA1:

5.1.1. SSPC-SP1 Solvent Cleaning5.1.2. SSPC-SP2 Hand Tool Cleaning5.1.3. SSPC-SP3 Power Tool Cleaning5.1.4. SSPC-SP5 White Metal Blast Cleaning5.1.5. SSPC-SP6 Commercial Blast Cleaning5.1.6. SSPC-SP10 Near White Blast Cleaning

5.2. Surfaces which have been cleaned and prepared for coating shall

receive the first or prime coat the same day and, in all cases, before thecleaned surface shows oxidation or is subjected to contamination. Areasdeveloping rust before being primed shall be recleaned.

5.3. All surfaces to be coated shall be free of all foreign matter such as millscale, rust, dirt, grease, oil and other deleterious substances.

5.4. Bare steel surfaces shall be solvent-washed as required to assure anoil and grease free surface in accordance with the Structural Steel PaintingCouncil Specification, SSPC-SP1. Final wiping shall be done with clean ragsand solvent so as to leave no oil residue.

5.5. Steel surfaces of unprimed steel shall be cleaned to bare metal by anapproved surface blasting process which will produce a finish conforming toSSPC-SP5, SSPC-SP6, or SSPC-SP10, as required for the primer materialspecified

5.6. Still surfaces that cannot be cleaned by blasting as specificallyspecified shall be cleaned to bare metal by wire brushing or other mechanicalmeans conforming to SSPC-SP3 or SSPC-SP2.

5.7. Primed surfaces shall be cleaned of dirt, grease, oil and foreign

material. When primed surfaces have been subjected to welding, all slagdeposits, welding fume deposits and oxides formed by welding shall beremoved for a distance of six inches from the weld area by sandblasting, winbrushing of other mechanical means conforming to SSPC-SP2 or SSPC-SP3.This procedure also applies to the repair of surfaces which have been shopprimed and damaged during shipment or construction.


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5.8. Items of manufactured equipment such as pumps, compressors,motors instruments, electrical items that have been painted or primed withmanufacturers standard paint shall not be blast cleaned.

5.9. Steel surfaces which have been coated with inorganic zinc which have

areas showing either poor adhesion or areas damaged during shipment orconstruction shall be cleaned as per Paragraph 5.6. After cleaning theseareas shall be coated with an inorganic zinc coating with a 2.5 mils minimumdry film thickness.

6.0. COATING APPLICATION

6.1. All work shall be performed with good clean brushes, approved rollersor approved spraying equipment, which will produce a finished surface freefrom drops, ridges, waves, laps, and brush marks. Suitable air filters andtraps shall be installed on blasting and spraying to equipment to remove

moisture and oil from the compressed air.

6.2. Whenever possible, surfaces which are inaccessible after erectionshall be treated, primed and painted prior to erection.

6.3. Paint shall be applied only when the air temperature is above 40OF,less than 100OF, and the relative humidity is less than 85%. Priming shall bediscontinued whenever the temperature is expect to drop to 32

OF before the

primer has dried. Paint shall not be applied to a surface that is at atemperature which will cause blistering porosity, or otherwise will bedetrimental to the life of the paint. Moisture cure paints and primers may be

applied per manufacturers instructions.

6.4. Paint or coating materials shall not be applied in damp or foggyweather, when it is raining or snowing or under any conditions that will resultin condensation on the surface to be painted.

6.5. Finish coats shall not be applied to surfaces on which the prime isscratched until such damaged area has been cleaned and primed.

6.6. Each coat of paint shall be in a proper state of cure or dryness beforethe application of the succeeding cost.

6.7. Whenever bare metal is exposed during cleaning of previously paintedsteel, a prime coast shall be applied to the exposed area before proceedingwith the finish coat.

6.8. The paint manufacturers recommendations for mixing, thinninghandling, and applying their products are incorporated into and made a part ofthis specification.


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6.9. The minimum dry film thickness in mils for each primer and paint coatshall be as specified in Section 9.0 of this Appendix. Dry film thickness will bemeasured with a calibrated thickness gauge. For steel surfaces, theminimum dry film thickness for the paint system, comprising the primer finish

coats, shall be 5.0 mils, unless otherwise specified. All measurements takenshall be according to SSPC-PA 2TBT.

6.10. To secure a satisfactory thickness of primer, rivet heads, bolt heads,nuts, all edges, corners and crevices shall be striped with priming paint bybrush or a single pass spray before the surfaces receive the prime coat ofpaint. Such striping shall extend one inch from all edges.

7.0. REPAIR WORK

7.1. Pinholes, skips, and areas with less than specified dry film thickness

shall be touched up or recoated.

7.2. Unacceptable runs, sags, dry over-spray, orange peel, and embeddeddust shall be removed by sanding or blasting. The surface shall be blownwith compressed air and vacuumed or wiped clean prior to being touched upor recoated.

7.3. Coatings that are damaged, blistered, cracked, peeling, or delaminatedshall be removed to the bare substrate and the surface prepared perspecification. Areas less than thirty (30) square inches may be prepared bypower tools. Dust and loose particles shall be removed by compressed air

and vacuumed or wiped clean prior to being recoated.

7.4. The paint subcontractor in the field shall be responsible for touch-upand repair of all shop primed items. All surfaces shall be properly cleanedand primed before the finished coat is applied.

8.0. INSPECTION AND TESTING

8.1. The dry film thickness shall be verified by measuring with a magneticgauge in accordance with SSPC-PA2.

8.2. Each cost shall be examined for the following:

8.2.1. Missed or skipped areas

8.2.2. Roughness or loss of gloss caused by embedded dust, dry over-spray, orange peel, or other similar conditions

8.2.3. Film defects such as pinholes, peeling, blistering, or de-lamination


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8.2.4. Runs, sags and over 150 percent of maximum or under 90 percentof the minimum specified dry film thickness.

8.2.5. Softness or tackiness

8.3. Each coat shall be examined before recoating to verify that the surfaceis clean, dry and free of contaminants.

8.4. The color of the finish coat shall be verified as correct by comparisonwith an accepted color sample.

8.5. The finished coating shall be the specified total dry film thickness andshall be uniform in appearance and free of shadows.

9.0 Paint System

For bare surfaces, including pipe, valves, fittings, structural steel:

Prime: Single component, moisture cure zinc rich urethaneWasser MC-ZincSurface prep: Commercial blast, SSPC SP-62.5-3.5 mils DFT

IntermediateCoat: Single component, moisture cure urethane

All colors except white: Wasser MC-Ferrox B

3.0-5.0 mils DFT

White: Wasser MC-CR3.0-5.0 mils DFT

Top Coat: Single component, moisture cure aliphatic urethaneWasser MC-Luster2.0-3.0 mils DFT

9.1 Paint System

All surfaces: Wasser Terra Green color.