He should make frequent checks of wet-? For most coatings the time to dry for recoat, even under optimum conditions varies with their composition and that of the subsequent coat. Protective coverings in place 5. Surface Preparation Methods and Requirements 5. Thinning with slower evaporating solvents may reduce or eliminate dry spray and produce a smooth surface. Coating should be worked into all irregularities in the surface, crevices, and corners.
The minimum and maximum particle size of the abrasive may be speci? Note 1 — For additional helpful information, refer to the following documents:. They are ideal for application of coatings to small, odd-shaped surfaces such as pipes and railings. Condition of edges, weld splatter 2.
The nap length used on metal surfaces, generally varies from 1? The angularity sharpness and density of the pro? Preparation for Inspection asmt. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Low voltage holiday detectors are suitable on coatings up to? A checklist for use by inspectors in the field is included in Appendix X1. The spray pattern should be adjusted so that the coating is deposited uniformly. Continue to monitor temperature and humidity conditions 8. Often it is acceptable in fabricating shops, but because of the possibility of damaging surrounding property or coating? The two sets of photographs are not directly ast.
Chloride from deicing salts or a marine environment, and sulfate contamination from air pollution have been recognized as main factors in premature breakdown of existing coating systems. Drying and Curing Times. This blasted surface should be protected by a clear acrylic coating or encased in plastic and used for reference purposes as the work progresses.
Any stained surface will need to be restored to its original condition without damage to that surface. The calibration should be made on metal of the same kind, temper, thickness, and contour as that beneath the coating. Start Webshop Product catalog Product presentation. Most obvious is noncompliance with the speci? Surface cleaning power tools consist of non-woven abrasive wheels and discs, coated abrasive discs or sanding pads, coated abrasive?
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Precautions in Preparing Unpainted and Previously. See Guide Asm for establishing procedures to certify inspectors for coatings work in nuclear facilities. Pressures over KPa 20 psi are needed to achieve total coating removal when using only water.
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We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. Pressurized water alone will not remove mill scale efficiently, or impart an anchor pro? The minimum treatment for aluminum is Type B, Method 3 of Practices Dwhich describes the use of an alcoholic phosphoric acid cleaner.
Test Methods D presents the procedure for using this type of gage. Surface cleaning, power tools, and surface pro? Some coatings have maximum recoat times. Note 1 — For additional helpful information, refer to the following documents:. Blast cleaning is used to remove foreign materials from the surface to provide a roughened surface by means of a dry sand, grit, or shot blast impinging the surface with hard abrasive particles impelled by air 5.
Maintenance of record book containing all transacations between the inspector and the contractor is essential to eliminate contract disputes. The poured-off vehicle should returned slowly to the original container with simultaneous agitation. The minimum and maximum particle size of the abrasive may be speci?
Visual observation and magnifying glass 4. Poor spray technique resulting in excessive overspray a sand-like? The voltage used is usually 3. It is important to note that the painting inspector check all areas and determine the? SSPC-Vis 3 is a visual standard to assist in determining compliance.
The application of coating to spot-cleaned areas should overlap the old, adjacent coating d a slight extent to ensure full coverage of the cleaned areas.
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