1. Scope

1.1 This guide is intended as an information aid to painting inspectors in carrying out their task efficiently. It includes the key elements of surface preparation, coatings application, and final approval for both field and shop work. The items should be selected that are pertinent to the specification of a particular job.

Note 1-For additional helpful information, refer to the following documents: Manual of Coating Work for Light-Water Nuclear Power Plant Primary Containment and Other Safety-Related Facilities New Concepts for Coating Protection of Steel Structures SSPC-PA Guide 3 A Guide to Safety in Paint Application Steel Structures Painting Manual Vol 1 Good Painting Practice Steel Structures Painting Manual Vol 2 Systems and Specifications Manufacturers Specifications and Instructions (made available to the inspector for reference to special requirements for proper application) Material Safety Data Sheets (needed to ensure that personnel take necessary precautions in handling hazardous materials).

1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

1.4 This guide is arranged in the following order:

Section Referenced Documents 2 ASTM Standards 2.1 OSHA Standards 2.2 Steel Structures Painting Council Pub- lications 2.3 Significance and Use 3 Preparation for Inspection 4 Field and Shop Inspection 5 Surface Preparation 5.1 Pictorial Standard D 2200 5.1.1 Factors Affecting Coating Perform- ance 5.2 Cleanliness 5.2.1 Mill Scale 5.2.2 Surface Profile 5.2.3 Cleaning Procedure 5.3 Chemical Cleaning 5.3.1 Solvent Vapor Cleaning 5.3.1.1 Hand Tool Cleaning 5.3.2 Power Tool Cleaning 5.3.3 Blast Cleaning 5.3.4 Cleaning and Preparation of Various Surfaces 5.4 Steel Surfaces 5.4.1 Galvanized Surfaces 5.4.2 Aluminum Surfaces 5.4.3 Precautions in Preparing Unpainted and Previously Painted Surfaces 5.4.4 Inspection of Surfaces Prior to Field Painting 5.5 New Construction 5.5.1 Maintenance Repainting 5.5.2 Inspection Equipment 6 General 6.1 Surface Profile Gages 6.1.1 Adhesion of Existing Coating 6.1.2 Portable Pull-off Adhesion Testers 6.1.3 Field Inspection Equipment 6.2 Drying and Curing Times 6.2.1 Thermometers 6.2.1.1 Dew Point 6.2.1.2 Coating Consistency 6.2.2 Consistency Cups 6.2.2.1 Weight-per-Gallon Cup 6.2.3 Wet-Film Thickness Gages 6.2.4 Interchemical Gage 6.2.4.1 Notched Gage 6.2.4.2 Dry-Film Thickness Gages 6.2.5 Tooke Gage 6.2.5.1 Nondestructive Film Thickness Gages 6.2.6 Magnetic-Type Gages 6.2.6.1 Coating Storage and Handling 7 Storage of Coating and Thinner 7.1 Mixing of Coatings 7.2 Thinning 7.3 Initial Samples 7.3.1 Thinning of Coating 7.3.2 Sampling of Thinned Coating 7.3.3 Heating of Coating 7.4 Weather Considerations 8 Drying 8.1 Low Temperature 8.2 High Temperature 8.3 Moisture 8.4 Wind 8.5 Coating Application 9 Residual Contaminants 9.1 Quality Assurance 9.2 Film Defects 9.2.1 Brush Application 9.3 Spray Application 9.4 Roller Application 9.5 Miscellaneous Methods 9.6 Rate of Application 9.7 Additional Considerations 10 Ventilation 10.1 Shopcoat Repair 10.2 Painting Schedule 10.3 Film Integrity 10.4 Recoat Time 10.5 Coating System Failure 10.6 Comparison of Surface Preparation Specifications Table 1 Inspection Checklist Appendix

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D16 Terminology for Paint, Related Coatings, Materials, and Applications

D1212 Test Methods for Measurement of Wet Film Thickness of Organic Coatings

D1475 Test Method For Density of Liquid Coatings, Inks, and Related Products

D1730 Practices for Preparation of Aluminum and Aluminum-Alloy Surfaces for Painting

D2092 Guide for Preparation of Zinc-Coated (Galvanized) Steel Surfaces for Painting

D2200 Practice for Use of Pictorial Surface Preparation Standards and Guides for Painting Steel Surfaces

D3359 Test Methods for Measuring Adhesion by Tape Test

D4138 Practices for Measurement of Dry Film Thickness of Protective Coating Systems by Destructive, Cross-Sectioning Means

D4212 Test Method for Viscosity by Dip-Type Viscosity Cups

D4285 Test Method for Indicating Oil or Water in Compressed Air

D4414 Practice for Measurement of Wet Film Thickness by Notch Gages

D4417 Test Methods for Field Measurement of Surface Profile of Blast Cleaned Steel

D4537 Guide for Establishing Procedures to Qualify and Certify Personnel Performing Coating and Lining Work Inspection in Nuclear Facilities

D4538 Terminology Relating to Protective Coating and Lining Work for Power Generation Facilities

D4541 Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers

D5064 Practice for Conducting a Patch Test to Assess Coating Compatibility

D5162 Practice for Discontinuity (Holiday) Testing of Nonconductive Protective Coating on Metallic Substrates

D6677 Test Method for Evaluating Adhesion by Knife

D7091 Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals and Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous Metals

Occupational Safety and Health Administration (OSHA) Standard

29CFR1926.59 Hazard Communication Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://www.dodssp.daps.mil.

Keywords

industrial structures; metal substrates; painting;

ICS Code

ICS Number Code 87.020 (Paint coating processes)

DOI: 10.1520/D3276-00

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