Laboratory method of evaluating the performance properties of lube oils for gas pumping sets

Abstract

A laboratory method was developed for evaluating the performance properties of lube oils used in gas-pumping sets. The correspondence of the results obtained by this method and the data on the performance of the oils was demonstrated. The method is intended for fast acceptance control of fresh oils, evaluation of the change in the properties of the oils during use and storage in warehouses, and for developing new lube oils and detecting counterfeit products.When poor-quality lube oils are used in gas-pumping sets (GPS), the risk of abnormal situations occurring increases significantly, irrevocable losses as a result of waste by oxidation are higher, and the oil in the lubricating system must be changed more frequently. For reliable evaluation of the quality of the lube oils supplied to Gazprom Co., it is not sufficient to determine the satisfaction of the requirements in the standards and specifications alone. The existing standards only contain the physicochemical properties of the oils, while there are no indexes that reflect the stability of the properties of the oils in use.Objective information on the quality of a lube oil can be obtained with a set of qualification evaluation methods (QEM) or by lengthy performance tests. These tests significantly increase the duration and cost of the evaluation and cannot be used for acceptance quality control of delivered oils.The most important performance property of lube oils is their capacity to withstand the oxidizing effect of atmospheric oxygen on contact with metal surfaces heated to high temperatures during operation of the GPS, since oxidation of the oil changes all of its physicochemical properties.The parameters and methods of evaluating the oxidation resistance set out in the standards for turbine oils reflect the characteristic features of the performance of the oil in steam turbines. However, these methods are

Desirability of adding mixtures of phenols and amine antioxidants to mineral oils

“…As the oxidation rate we took the constant quantity obtained on testing these in the presence of a catalyst at high temperatures, which is virtually equal to the amount of Lubricating oil specimens were oxidized as described in [2]. The contents of oxidation products were determined by IR spectroscopy from the integral absorption area in the region of wavelengths 1645 -1825 cm -1 in the differential spectrum obtained by subtracting the IR spectrum of the unoxidized oil from the IR spectrum of the oxidized oil.…”