Heat transfer oil is a kind of heat transfer medium, because of its heating uniformity, accurate temperature control temperature control, can produce high temperature under low vapor pressure, heat transfer effect, energy saving, transportation and easy operation characteristics, has been widely used in recent years In a variety of occasions, and its use and consumption of more and more. In the choice of conducting oil, the first should determine the appropriate heating process, the best commissioned by the professional sector to do system design. If the system has coke, need to re-election of oil, you should carefully identify the cause of coking, the system design, component set and operation and management of the problem correction, but also on the system carefully cleaned. At present, the implementation of China's thermal oil products SH / T 0677-1999 "conducting oil" standard, users should pay attention to the following issues before buying:
First, the highest temperature of the authenticity of the product - the Institute of Science and Technology adopted thermal stability test method to determine the maximum temperature in the use of the test after the appearance of transparent, no suspended solids and precipitation, the total rate of change is not more than 10% Corresponding temperature. Through the comparison with the new standard, analysis of the authenticity of the product manual. In particular, to understand the provisions of the maximum temperature is
How to determine, there is no authority of the test report. According to international standard classification, the maximum temperature of mineral-based heat-conducting oil temperature does not exceed 350 ℃, the current most of the oil's maximum operating temperature of 320 ℃.
In this case,
Second, the product of the evaporation and safety - flash point (opening) in line with the standard index requirements, the initial boiling point of not less than its maximum operating temperature, distillation range is relatively narrow, the ignition is relatively high.
In this case,
Third, the refined depth of the product inspection - the appearance of light yellow transparent liquid, storage stability, light does not change color or precipitation. Residual carbon is not more than 0.1%, distillation content of not more than 0.2%.
In this case,
Fourth, the study of low-temperature fluidity of products - according to the user's location and equipment, the ambient temperature, select the appropriate low-temperature performance. QB and QC pour points of not more than -9 ℃, low temperature kinematic viscosity (0 ℃ or lower temperature) is relatively low.
In this case,
Fifth, the study of product heat transfer performance - has a lower viscosity, greater density, higher specific heat capacity and thermal conductivity.
In this case,
Six, select the regular production of enterprise products. Conditional to field inspection of its production equipment and testing methods to improve the situation
