placed in context of the recently approved ASTM Practice E alternative means of executing this ASTM Practice, its objective being to minimize . 1 May Purchase your copy of ASTM E – 10 as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available. 1 Jan Buy ASTM E PRACTICE FOR CONDITION MONITORING OF IN- SERVICE LUBRICANTS BY TREND ANALYSIS USING FOURIER.
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Warning or alarm limits the point where maintenance action on a machine being monitored is recommended or required can be determined through statistical analysis, history of the same or similar equipment, round robin tests or other methods in conjunction with correlation to equipment performance. This practice is designed for monitoring in-service lubricants and can aid in the determination of general machinery health and is not designed for the analysis of lubricant composition, lubricant performance or additive package formulations.
Historical Version s – view previous versions of standard.
The infrared data generated by this practice is typically used e212 conjunction with other testing methods. Oxidation, nitration and sulfonation of base stocks are monitored as evidence of degradation.
The practice as presented is not intended for the prediction of lubricant physical properties for example, viscosity, total base number, total acid number, etc. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Molecular analysis of lubricants and hydraulic fluids by FT-IR spectroscopy produces direct information on molecular species of interest, including additives, fluid breakdown products and external contaminants, and thus complements wear metal and other analyses used in a condition monitoring program 13- 2.
A number of physical property tests complement wear metal analysis and are used to provide information on lubricant condition for example, Test Methods DDand D This creates a huge issue for some engines, mainly natural gas engines as they operate at higher combustion temperatures and therefore high Nitrous Oxides NOx are formed.
It is not the intent of this practice to establish or recommend normal, cautionary, warning or alert limits for any machinery. The objective of this monitoring activity is to diagnose the operational condition of the machine based on fault conditions aastm in the oil. Nitration occours when there is sufficient heat and pressure in the combustion chambers of the engines which breakes the atmospheric nitrogen molecule down to two atoms which thereafter react with oxygen to form Nitrous Oxides NOx.
No other units of measurement are included in this standard. While calibration to generate physical concentration units may be possible, it is unnecessary or impractical in many cases. Nitration Testing Equipment used r2412 us in our Laboratory.
Increase in viscosity due to thickning of the oil Increase in the acidity of the oil resulting in increase in Acid Number AN Increase in insolubles. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. If the oil is exposed to severe nitration conditions, the nitration products in the oil will cause: Such limits should be established in conjunction with advice and guidance from the machinery manufacturer and maintenance group.
Contaminants monitored include water, soot, ethylene glycol, fuels and incorrect oil. Testing Equipment used by us in our laboratory: Link to Active This link will always route to the current Active version of the standard. Work Item s – proposed revisions of this standard. These warning or alarm limits can be a fixed maximum or minimum value for comparison to a single measurement or can also be based on a rate of change of the response measured 1.
E212 the oil is exposed to s2412 nitration conditions, the nitration products in the oil will cause:. Level Zero and Level One Tests.
For 2e412, infrared spectroscopy cannot determine wear metal levels or any other type of elemental analysis. The testing of Nitration is done in our laboratory by using FTIR Fourier transform infrared spectrometer, which can be coupled with Acid Number Test and Viscosity to determine the extent of nitration and degradation of the oil.
Through normal blow-by, when nitrogen oxide products enter the lubricant, the react with the moisture and become acidic in nature and rapidly accelerate the oxidation rate of the oil. Measurement and data interpretation parameters are presented to allow operators of different FT-IR spectrometers to compare results by employing the same techniques.
This includes varnish or lacquer in hot areas of the engine, and sludge in cooler areas of the engine which may lead to ring sticking and filter plugging, respectively Increase in blow-by which will lead to top-end wear.