In the ISO 12185 standard developed by the International Standards Organization (ISO), there is a method for determining the density of crude oil and related products in the range of 600 kg/m3 to 1100 kg/m3, which is considered as single-phase liquids at test temperature and pressure, using an oscillating U-tube densitometer device. test method is explained.
This standard applies to all liquids of any vapor pressure if appropriate precautions are taken to ensure that they remain in a single phase without loss of light ends and subsequent changes in composition and density during both sample processing and density determination.
The determined density can be converted to a density at some reference temperature using oil measurement charts. In this case, the determination should be made at a temperature as close as possible to the reference temperature, in order to minimize uncertainties due to the use of generalized tables. This test method is not intended for use in calibrating online density meters.
For the purposes of the ISO 12185 standard, the concept of density refers to the mass of a substance, expressed in kilograms, divided by its volume, expressed in cubic meters. The reference temperature concept refers to the temperature at which the sample density will be reported. This temperature should be 15 degrees or 20 degrees.
The density of a liquid is determined using several measuring instruments. Recently, oscillating density meters have been widely used. However, there has always been a need for a system in which the density of liquids is determined absolutely. The working principle of an oscillating density meter is based on the law of harmonic oscillation, in which a U-tube is completely filled with the sample to be analyzed and subjected to an electromagnetic force. It In this method, the density value of the sample is calculated by measuring the vibration frequency and duration of the tube filled with the sample. This measuring principle is based on the mass-spring model. The measuring cell consists of an oscillator formed by a hollow U-shaped borosilicate glass tube containing approximately 0,7 ml of sample.
Among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors, our company also provides density determination (oscillating U-tube method) testing services of crude oil and petroleum products within the scope of ISO 12185 standard, with its trained and expert staff and advanced technological equipment. gives.
To get an appointment, to get more detailed information or to request an evaluation, you can ask us to fill in our form and reach you.
EUROLABreporting and certification activities, United Accreditation Foundation (UAF), Turkish Accreditation Agency (TÜRKAK), Enterprise Accreditation Foundation (EAF) based on the accreditation provided by its institution. The Enterprise Accreditation Foundation (EAF) is also a signatory to the United Nations (UN GLOBAL COMPACT).
