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Care should be taken by the contractor during painting operations to protect adjacent surfaces from being stained by the coating being applied.
Tree limbs or other growth obstructing the structure should be cut astk to provide ready access. Standards monitoring is a free service designed for you who wish to be alerted of changes to or new editions of the standards required in your work.
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ast, Pressure gage III Comments: If uncorrected, dry spray may create holidays, leading to poor performance, and it can interfere with adhesion of the applied or subsequent coat. Because the shop prime coat inspector may not be the person doing the? 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 d32766 air 5.
Film thickness—wet —dry Time from xstm preparation to application 2. Note 1 – For additional helpful information, refer to the following documents: Visual observation and touch 2. Surface Preparation Methods and Requirements.
A ground wire is attached to the bare substrate. The electrode is moved over the surface and a spark jumps from the electrode to the substrate at pinholes, holidays, or excessively thin areas. Nondestructive Film Thickness Gages.
A relatively inexpensive balance having a sensitivity of 0. Test Methods D and D describe procedures. Relative Humidity and Dew Point.
The values given in parentheses are for information only. The length of time between shop priming and erection and subsequent topcoating should be kept to a minimum to avoid the problem of intercoat adhesion. Record time application completed Continue to monitor temperature and humidity conditions 8.
The trigger of the gun should be released at the end of each stroke. This is especially true in spring and fall when days are warm and nights are cool. Some materials may even require constant agitation during use.
If the coat being measured has an appreciable softening effect on the previous coat, a wet-? Pinhole and holiday detectors are either low voltage or high voltage. They are ideal for application of coatings to astn, odd-shaped surfaces such as pipes and railings. Occupational Health and Safety Administration regulations should be followed.
Thickness of coating on any type of stable substrate may be determined, and individual coats may be measured separately providing they are distinguishable, for example, by color.
If a pinhole or holiday is present, an electrical circuit is completed and the alarm sounds. This speeds acceptance of a coating.
The contaminants should be removed not simply spread out by a thorough wiping of the affected areas with cloths saturated with clean solvent. The coating should not be mixed or satm in suspension by means of an air stream bubbling under the coating surface.
ASTM D – 07 Standard Guide for Painting Inspectors (Metal Substrates)
Their use and operation is presented in Practice D See Guide D for establishing procedures to certify inspectors for coatings work in nuclear facilities. The method is also described in SSPC-PA 2, which includes instructions on the number of measurements for different areas and tolerances on the required?
It is then withdrawn perpendicularly without a sliding movement. Application technique with a pad on large surface areas is similar to that used with a roller. Most obvious is noncompliance with the speci?
High voltage holiday detectors are capable of producing various voltage outputs. Each has its own safety-related hazards, and U. It includes the key elements of surface preparation, coatings application, and final approval ast both field and shop work.
This results in an inability of the? The moment new editions of the standards you monitor are released, changes are made, or appendixes are published, you will be alerted by email. D2376 roller technique requires application in the form of a V or W depending on the size of the area involved.
Cleaning and Preparation of Various Surfaces.