AD Systems specializes in the design, manufacturing, selling and servicing of unique test equipment for the evaluation of physical properties and performances of fuels and lubricants. All of the products offered by AD Systems were developed in response to specific needs within the petroleum industry.
The ASTM D3241 Thermal Stability test is one of the most important tests for the jet fuel quality. This test method was inherently limited due to the subjectivity in the color standard for tube deposit rating. Recently advanced metrological testing methods for quantifying thermal stability characteristics of jet fuels was declared the referee technique by jet fuel specification bodies.
AD Systems developed a new jet fuel thermal oxidation test rig (TO10) that ensures perfect fuel preparation, perfect fuel flow control, a perfect heater tube temperature profile and perfect thermal deposit quantification with the Deposit Rater – DR10.
Thermal Oxidation Stability of Aviation Turbine Fuels, ASTM D3241 is universally used by the industry to measure high temperature stability of aviation turbine fuels. The ASTM D3241 is required to be run on every batch of jet fuel produced according to ASTM D1655 or DEF STAN 91-91 specifications. In this test method, the fuel is pumped through heater tube at fixed flow rate and during a specified period of time. The fuel is pass or fail rated according to the amount of deposit formed on the heater tube at a specified temperature. Traditionally, the amount of deposit on the tube is rated visually against a reference color scale. The proper rating requires significant experience and expertise. However, operator capabilities vary, so evaluation of color can be quite subjective.
Many articles have been published on the fact that color does not provide real information on the thickness and volume of deposits, parameters which are far more meaningful for characterizing jet fuels for users and suppliers. The aviation fuel industry found that one of the most crucial stages of this test method is an objective analysis of deposit produced on the heater tube.
The DR10 test is simple and straightforward. The heater tube is prepared according to ASTM D3241 test procedure and is then placed in the test chamber of the DR10. Using an intuitive graphical interface with touch screen panel, the operator enters sample information and starts a tube scan. Specific light is emitted and directed onto the surface of the heater tube. The reflected light is collected and the interference created by the deposit is monitored by the spectrometer. The software analyzes the interference and calculates the deposit thickness. Precise thickness measurements are taken at 1,200 points along and around the tube surface. A detailed test report is ready in less than 15 minutes.
The Smoke Point method, in accordance with ASTM D1322, IP 598, is one of the oldest test methods in the petroleum industry. This test method provides an indication of the relative smoke producing properties of kerosenes and aviation turbine fuels in a diffusion flame. The smoke point is related to the hydrocarbon composition of such fuels.
The SP10 Revolutionizes Smoke Point Testing
This unique automated instrument uses a patented system (License TOTAL RM) based on a video camera that measures the flame. The flame image is digitalized. The dedicated software determines the height of the flame when its shape corresponds to the one described in the test method. This specific flame is the one with the maximum height without smoke generation. The SP10 performs three determinations of the flame heights and reports the average value in strict accordance with the test method. The results are saved in an internal database and can be printed, transferred to a USB memory stick and/or sent to a LIMS. Every test is fully documented and traceable, which is imperative for aviation industry quality procedures.
Thermal Oxidation Stability
ASTM D3241, IP 323, ISO 6249, ASTM D1655, D7566, DEF STAN 91-091
ITR Thermal Oxidation Stability Tube Deposit Rater
ASTM D3241, ASTM D1655, ASTM D7566, ISO 6249, Def Stan 91-91
Smoke Point Tester
ASTM D1322, D1655, IP 598, Def Stan 91-91
NACE TM0172, ASTM D665, D7548, IP 135, ISO 7120, JIS K2510
Fuel Stability and Compatibility Tester
In-Service Engine Oils with Blotter Spot Method
Reid Vapor Pressure - AutoREID
ASTM D323, D4953, ISO 3007, IP 69