1. Rationale
It is common for some sample types, such as viscous lube oils that fall within the scope of the method, to be prone to contain tiny bubbles soon after manufacture which can take a significant amount of time (e.g., up to 24 hours) for bubbles to completely dissipate before drawing an aliquot for analysis, causing an undue delay in performing measurements by this method. To address this issue, a proposed revision is identified to allow the optional use of an ultrasonic bath to effectively remove air or gas bubbles from viscous lube samples prior to analysis without adversely impacting results determined. The proposed revision is similar to the language adopted in ASTM D4052.
Keywords
ASTM Color; color; petroleum products; ASTM color scale; Color--petroleum products; Fuel oils; Heating oils; Lubricating oils; Petroleum wax; Visual examination--color; Visual examination--electrical insulating materials; Visual examination--petroleum products;
Citing ASTM Standards
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