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Standard Test Methods for Holiday Detection in Pipeline Coatings
Automatische name übersetzung:
Standard-Prüfverfahren für Ferien Erkennung in Pipeline Coatings
NORM herausgegeben am 1.7.2014
Bezeichnung normen: ASTM G62-14
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 1.7.2014
SKU: NS-57762
Zahl der Seiten: 4
Gewicht ca.: 12 g (0.03 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Keywords:
holiday detector, holidays, piping, pinhole, wet sponge detector, ICS Number Code 23.040.99 (Other pipeline components)
Significance and Use | ||
5.1 Method A—Method A describes a quick, safe method for determining if pinholes, voids, or metal particles are protruding through the coating. This method will not, however, find any thin spots in the coating. This method will determine the existence of any gross faults in thin-film pipeline coatings. 5.2 Method B—Method B describes a method for determining if pinholes, voids, or metal particles are protruding through the coating, and thin spots in pipeline coatings. This method can be used to verify minimum coating thicknesses as well as voids in quality-control applications. |
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1. Scope | ||
1.1 These test methods cover the apparatus and procedure for detecting holidays in pipeline type coatings. 1.2 Method A is designed to detect holidays such as pinholes and voids in thin-film coatings from 0.025 to 0.254 mm (1 to 10 mils) in thickness using ordinary tap water and an applied voltage of less than 100 V d-c. It is effective on films up to 0.508 mm (20 mils) thickness if a wetting agent is used with the water. It should be noted, however, that this method will not detect thin spots in the coating. This may be considered to be a nondestructive test because of the relatively low voltage. 1.3 Method B is designed to detect holidays such as pinholes and voids in pipeline coatings; but because of the higher applied voltages, it can also be used to detect thin spots in the coating. This method can be used on any thickness of pipeline coating and utilizes applied voltages between 900 and 20 000 V d-c.1.4 The values stated in SI units to three significant decimals are to be regarded as the standard. The values given in parentheses are for information only. 1.5 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. |
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2. Referenced Documents | ||
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Historisch
15.2.2010
Historisch
1.4.2011
Historisch
15.12.2011
Historisch
1.4.2012
Historisch
1.8.2013
Historisch
1.6.2013
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