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ASTM D3427-14
Standard Test Method for Air Release Properties of Petroleum Oils
Automaticky přeložený název:
Standardní zkušební metoda pro Air uvolňovací vlastnosti minerálních olejů
NORMA vydána dne 1.5.2014
Informace o normě:
Označení normy: ASTM D3427-14
Poznámka: NEPLATNÁ
Datum vydání normy: 1.5.2014
Kód zboží: NS-23613
Počet stran: 6
Přibližná hmotnost: 18 g (0.04 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Anotace textu normy ASTM D3427-14 :
Keywords:
air entrainment, air release time, gear oil, hydraulic oil, turbine oil, ICS Number Code 75.080 (Petroleum products in general)
Doplňující informace
| Significance and Use | ||||||||||
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5.1 Agitation of lubricating oil with air in equipment, such as bearings, couplings, gears, pumps, and oil return lines, may produce a dispersion of finely divided air bubbles in the oil. If the residence time in the reservoir is too short to allow the air bubbles to rise to the oil surface, a mixture of air and oil will circulate through the lubricating oil system. This may result in an inability to maintain oil pressure (particularly with centrifugal pumps), incomplete oil films in bearings and gears, and poor hydraulic system performance or failure. 5.2 This test method measures the time for the entrained air content to fall to the relatively low value of 0.2 % volume under a standardized set of test conditions and hence permits the comparison of the ability of oils to separate entrained air under conditions where a separation time is available. The significance of this test method has not been fully established. However, entrained air can cause sponginess and lack of sensitivity of the control of turbine and hydraulic systems. This test may not be suitable for ranking oils in applications where residence times are short and gas contents are high. |
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| 1. Scope | ||||||||||
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1.1 This test method covers the ability of turbine, hydraulic, and gear oils to separate entrained air. 1.2 The values stated in SI units
are to be regarded as standard. No other units of measurement are
included in this standard.
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. |
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| 2. Referenced Documents | ||||||||||
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