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The water content in crude oil is an important indicator for evaluating the quality of crude oil and influencing its processing and transportation. Accurately determining its content is of vital importance to the production and operation of the crude oil industry. The common method for determining the moisture content of crude oil is distillation. It involves heating the crude oil to evaporate the moisture, which is then collected and measured after condensation to obtain the water content data in the crude oil.   The SD8929B crude oil and petroleum moisture meter is a professional instrument specifically designed for determining the water content in crude oil. Its design fully complies with the requirements of the People's Republic of China standard GB/T 8929-2006 "Determination of Water Content in Crude Oil - Distillation Method", and is suitable for determining the water content in crude oil by the distillation method stipulated in this standard. The instrument adopts an electronic solid-state voltage regulator for temperature control, and is equipped with a 1000ml distillation flask, a 5ml (minimum scale 0.05ml) water receiver and a 400mm±5mm condenser. It can accurately complete the crude oil moisture determination experiment. Moreover, the design of the test vessel holder is reasonable, and the installation and disassembly of the condenser tube are convenient.     Experimental instruments   1. The SD8929B crude oil and petroleum moisture meter developed and produced by Shandong Shengtai Instrument Co., LTD 2. Instrument accessory components, including condenser tubes, receivers, round-bottom flasks, columns, condenser tube clamps, etc

The degree of corrosion is a key indicator for measuring the ability of engine coolant to damage metal parts. During long-term circulation, engine coolant will come into contact with metals such as steel, copper and aluminum in the cooling system. If the anti-corrosion performance of the coolant is insufficient, it will cause metal rust and corrosion, which in turn will affect the heat dissipation efficiency of the cooling system. In severe cases, it may even cause component leakage and malfunction, shortening the service life of the engine. Therefore, it is necessary to measure the degree of corrosion of the coolant on the metal through professional equipment to provide a basis for the quality assessment and use of the coolant. The corrosive impact of engine coolant is mainly related to the metal material and the usage environment. The corrosion resistance of different metals in coolant varies. For instance, commonly used cooling system metals such as 20# steel, brass, and copper have a significantly increased risk of corrosion under high-temperature and oxygen-exposed conditions. When the coolant is in a high-temperature environment (such as close to 100℃), its chemical activity increases, the reaction rate with metals accelerates, and at the same time, oxygen in the air diffuses into the coolant, which also intensifies oxidation corrosion. In addition, factors such as metal impurities and water quality within the cooling system may also indirectly promote corrosion reactions, leading to rusting and weight loss of metal test pieces.   The SH0085B Engine coolant corrosion Tester is a professional device designed and manufactured in accordance with the standards of the petrochemical industry of the People's Republic of China and ASTM D1384 "Test Methods for Engine Coolant Corrosion". It is suitable for determining the corrosion degree of high-boiling-point and low-boiling-point engine coolant and concentrate on typical metal test pieces, providing data support for the quality inspection, research and development, and use and maintenance of coolant products. This instrument features multiple core functions and technical advantages:   It adopts a metal bath heating method, with a temperature control range covering room temperature to 100℃, and a temperature control accuracy of ±0.1℃, which can precisely simulate the high-temperature working environment of coolant in the engine. It is equipped with a silent air compressor, eliminating the need for manual gas mixing. The gas flow rate can be adjusted to 100ml/min±10ml/min by the flowmeter, meeting the requirements of ASTM D1384 standard for the gas environment. It supports conducting three groups of experiments simultaneously. It is equipped with a transparent observation window and heat-resistant glass components (such as a 1000ml high-neckless beaker and a sand core glass gas diffuser), allowing for real-time observation of the experimental status and ensuring the intuitness of the experimental process and the accuracy of the data. The overall power of the instrument is 2.5kW, with a standby power consumption of no more than 2000W. It is also equipped with a wide-range timer from 0 to 9999 hours, which can meet the corrosion testing requirements of different durations.   During the test, metal test pieces that meet the standards should be used, including 20# steel sheets, brass sheets, copper sheets of 50x20x2mm, as well as cast aluminum sheets, solder sheets, and cast iron sheets of 50x25x3.5mm (all with a single center hole of φ7.0mm), and auxiliary accessories such as brass washers, insulating washers, and steel washers should be used to ensure full contact between the test pieces and the coolant. Ensure the reliability of the test results.

Engine coolant is a key medium for ensuring the normal operation of the engine's cooling system. It is divided into two types: high-boiling-point and low-boiling-point. Its concentrated liquid may cause corrosion to metal parts during use. The SH0085 engine coolant corrosion tester can accurately measure the corrosion degree of high-boiling-point and low-boiling-point engine coolants and their concentrates on typical metal test pieces such as 20# steel, brass, red copper, cast aluminum, solder, and cast iron.   In application, this instrument can not only provide data support for coolant manufacturing enterprises to control product quality, but also help testing institutions verify whether the coolant meets relevant standard requirements, avoiding problems such as damage to engine heat dissipation components and shortened equipment service life caused by coolant corrosion.   The SH0085 engine coolant corrosion tester is designed and manufactured in accordance with the SH/T0085 and ASTMD1384 standards of the People's Republic of China Petrochemical Industry. Its core configurations include   1. It comes with a silent air compressor, eliminating the need for manual air supply and simplifying the operation process. 2. 3 detection holes can be used to conduct multiple sets of tests simultaneously, improving the detection efficiency. 3. The temperature control range covers room temperature to +100℃, with an accuracy of ±0.1℃. It is equipped with a water-cooled reflux condenser tube of no less than 400mm to ensure a stable test environment. 4. It is equipped with standard-compliant components such as a 1000ml heat-resistant glass high-profile beaker without a spout and a gas diffusion tube with a sand core glass diffusion head to ensure the accuracy of the detection.   Experimental instruments   1. The SH0085 engine coolant corrosion tester developed and produced by Shandong Shengtai Instrument Co., LTD   2. The accompanying metal test pieces (3 groups, including 50x25x2mm 20# steel, brass, red copper test pieces and 50x25x3.5mm cast aluminum, solder, cast iron test pieces), brass gaskets, insulating gaskets, steel gaskets, insulating sleeves, brass brackets and other auxiliary components

The content of mechanical impurities is a key indicator for measuring the purity of petroleum products. It refers to solid or semi-solid impurities in petroleum products that are insoluble in specified solvents. These impurities may cause equipment wear, clog oil circuits, and affect the performance of petroleum products and the service life of equipment.   The determination of mechanical impurities in petroleum products should follow a specific process: First, weigh a certain amount of the sample, dissolve it in the corresponding solvent, then filter it with a constant-weight filter paper or microporous glass filter. The residue left on the filter medium is the mechanical impurity. Finally, calculate the content of the impurity in the petroleum product by weighing its weight. The determination of different types of petroleum products (such as light oil, heavy oil, and lubricating oil) requires the selection of appropriate solvents and operating parameters based on their characteristics to ensure the accuracy of the determination results.       The SH101B automatic mechanical impurity tester (without balance) is a professional device designed and manufactured in accordance with the national standard GB/ T511-2010 "Determination of Mechanical Impurities in Petroleum and Petroleum Products and Additives (Gravimetric Method)". It is suitable for determining the mechanical impurity content in various light oils, heavy oils, lubricating oils and additives. This instrument features multiple core advantages: it is equipped with an oil-free and maintenance-free vacuum pump and a dual-channel preheating system. There is no need to connect an external vacuum pump or water bath pot. One main unit can complete the entire measurement process. Equipped with a 7-inch true-color touch screen (resolution 800×480), it offers convenient human-machine interaction. It adopts 4-channel PID temperature control, which can precisely control the preheating temperature of solvent oil and the temperature of the holding funnel. The temperature control range covers room temperature to 100℃, and the display accuracy and resolution both reach 0.1℃. It is equipped with an internal computing program that can automatically process data and save 199 sets of historical records. It comes standard with a 58mm wide micro thermal printer that supports automatic printing. The results can also be exported to a PC in CSV or Excel format via a USB flash drive for long-term storage. Some models can be optionally equipped with TCP network remote upgrade and LIMS system connection functions.   In practical applications, the operator needs to first check the instrument accessories (including 1 main unit, 2 beakers, 2 funnels, 2 suction flasks, etc.) against the packing list. Then, set the instrument parameters according to the type of sample to be tested. After weighing the sample and inputting the weight, the instrument will automatically complete the steps of dissolution, filtration, and temperature control, and finally output the result of mechanical impurity content. It has significantly enhanced the efficiency and accuracy of mechanical impurity determination in petroleum products.

Solid or semi-solid impurities that may exist in petroleum products and additives, such as sand, metal debris, carbon slag, etc., can affect the performance of oil products, such as blocking oil passages and accelerating equipment wear. Their content needs to be determined through specific methods. The determination of mechanical impurities is one of the important indicators for evaluating the purity and quality of petroleum products, especially crucial for the safety of use of lubricating oil, heavy oil and other products.     The SH101 mechanical impurity tester for petroleum oil additives features LED digital temperature display with an accuracy of 0.1℃. It supports temperature control from room temperature to 100℃ and provides a stable heating environment through metal bath heating. Moreover, it is equipped with a built-in air pump, eliminating the need for an external air source. This instrument is designed in accordance with the national standard GB/T511 "Determination of Mechanical Impurities in Petroleum Products and Additives (Gravimetric Method)". It can accurately determine the mechanical impurity content of light and heavy oils, lubricating oils and additives in petroleum products. During the determination process, the sample is dissolved in a solvent and then filtered through a constant-weight filter paper or microporous glass filter. The content is obtained by weighing the residual impurities.   Experimental instruments The SH101 mechanical impurity tester (with built-in vacuum pump) developed and produced by Shandong Shengtai Instrument Co., Ltd. 2. Accessories: 500ml suction flask (with 9# white rubber stopper), glass funnel, temperature sensor (built-in instrument)

Liquid density is a key physical property of petroleum products, directly affecting the measurement accuracy during storage and transportation, as well as the product classification during production fractionation (such as fuel quality calculation, different density components corresponding to different products). Precise measurement is of great significance.   When determining the density of liquid petroleum products, it is crucial to control the temperature and select the right instrument: an increase in temperature will reduce the density, so the sample should be stabilized at a standard temperature (such as 20℃) to ensure data comparability. The density ranges of different oil products (such as gasoline and diesel) vary. Therefore, instruments with matching measurement ranges and meeting precision standards should be selected.       The SH102D automatic density tester is manufactured in accordance with multiple standards such as GB/T2013-2010, ASTMD 4052, and ISO 12185 1996. It is suitable for density detection of petroleum products such as crude oil and gasoline, as well as other industrial liquids.   It adopts the U-tube oscillation method. After injecting 2ml of sample, the density is calculated and displayed in combination with the sample tube constant (determined by the known density calibration solution). The measurement range is 0.001 to 1.999g/cm³, with both accuracy and resolution of ±0.001g/cm³. It maintains a constant temperature of 20℃±0.1℃ (customizable for 15~35℃) and can store 80 sets of data. Meet the requirements of regular and batch testing.

This type of semi-automatic density measurement equipment used for crude oil detection in the petroleum industry has the core function of accurately measuring the density of crude oil, liquid petroleum products and some chemical products, providing key data support for quality inspection and production control in the petroleum and chemical fields. The determination principle is based on the densitometer method. By controlling the temperature of the detection environment, accurately collecting temperature data, and combining with the density measurement component, the scientific determination of the sample density is achieved.   In specific applications, the measurement results of this equipment can reflect key attributes such as the purity and composition of petroleum products. For instance, it can assist in determining the quality grade of crude oil or provide a basis for adjusting the production process of liquid petroleum products. For different types of samples (such as crude oil, coking oil, engine coolant), corresponding standards should be followed for testing to ensure the accuracy and applicability of the results.   This equipment is designed and manufactured in accordance with the provisions of the national standards GB/T 1884 "Determination of Density of Petroleum and Liquid Petroleum Products (densitometer Method)", ASTM D1298 and GB/T 2281-2008 "Test Method for Density of Coking Oil Products", etc. It complies with GB 36170-2018 "Crude Oil", SH 0068 "Determination of Density or Relative Density of Engine Coolant and Its Concentrate (Hydrometer Method)" and GB/T 4472 "Determination of Density and Relative Density of Chemical Products" simultaneously, and is applicable to the density determination of crude oil, liquid petroleum products and chemical products. Its technical features are prominent, specifically manifested as: In terms of temperature control, the conventional temperature measurement range is 0-100℃ (customizable range: -60℃-80℃), with a temperature control accuracy of 0.1℃. It is equipped with an industrial high-precision PT100 sensor to ensure the accuracy of temperature data collection. In terms of operation and data processing, it adopts a large color LCD screen display, is equipped with a full Chinese human-machine dialogue interface, and is fitted with a micro printer that can automatically print density values. At the same time, it supports the function of USB flash drive data export, which can transfer data to the PC end for long-term storage. In terms of hardware configuration, it includes a 500ml capacity test tube, an electric stirring device and a compressor refrigeration system. The overall power consumption of the machine does not exceed 2000W, and the working power supply is compatible with AC220V±10%, 50Hz, which can ensure the stable operation of the equipment.   In addition, the manufacturer of this equipment provides corresponding quality guarantees, covering a one-year warranty for the entire machine (excluding normal wear and tear of vulnerable parts), free repair for faults not attributable to the user during the warranty period, lifetime preferential supply of spare parts and lifetime maintenance and repair for the entire machine. After the warranty period, only the cost will be charged for providing repair services.

The content index of acidic substances in transformer oil, expressed as the milligrams of potassium hydroxide required to neutralize 1 gram of oil sample (mgKOH/g), is an important basis for judging the oxidation degree, corrosiveness of the oil and whether it needs to be replaced. By measuring the acid value, the aging of insulation materials and the corrosion of metal parts caused by excessive acidity of the oil can be prevented, ensuring the safe operation of power equipment such as transformers and steam turbines.     The SH108 transformer oil acid value tester features a large blue LCD screen display, a Chinese menu and unmarked keys, making operation intuitive and simple. It complies with the national standards GB/T 264 "Determination of Acid Value of Petroleum Products" and GB7599 "Determination of Acid Value of Transformer Oil and Turbine Oil in Operation (BTB Method)". Based on the principle of titration neutralization, it automatically completes liquid injection, titration, stirring and endpoint determination under the control of a microcomputer. The measurement can be completed within 7 minutes and the results can be automatically printed. This instrument supports testing 1 to 3 oil samples at a time. The reagent bottles can be isolated from air to prevent reagent evaporation and interference from carbon dioxide, while also protecting the safety of the operator.   Experimental instruments The SH108 transformer oil acid value tester developed and produced by Shandong Shengtai Instrument Co., LTD 2. Instrument accessories (including 3 sample oil cups, 3 stirring magnetic rods, 1 bottle of extraction solution, 1 bottle of neutralization solution, etc.)

The acid value of oil products is an indicator for measuring the content of acidic substances in petroleum products, expressed as the milligrams of potassium hydroxide required to neutralize 1 gram of oil sample (mgKOH/g). It is a key basis for judging the degree of oxidation and deterioration of oil products, the corrosiveness of equipment, and whether replacement is needed. By measuring the acid value, the aging of insulating materials and the corrosion of metal parts of power equipment such as transformers and steam turbines caused by excessively high acidity in oil samples can be prevented in advance, ensuring the long-term safe and stable operation of the equipment.   The determination of acid value in oil products is widely applied in the quality control of products in petroleum refineries, the monitoring of equipment oil in power plants, and the oil analysis and research in scientific research institutions. It is an indispensable testing item in the oil quality inspection process. The SH108A fully automatic oleic acid value tester features a large blue LCD screen display, with a Chinese menu and unmarked keys, making operation intuitive and simple. It complies with the national standards GB/T264 "Determination of Acid Value of Petroleum Products" and GB/T4945 "Determination of Acid Value and Base Value of Petroleum Products and Lubricants (Color Indicator Method)". Based on the principle of titration neutralization, it automatically completes liquid injection, titration, stirring and determination of the endpoint of neutralization titration under the control of a microcomputer. The measurement can be completed within 7 minutes. And it can automatically print and record the results. The instrument uses specially designed reagent bottles to hold the extraction liquid and neutralization liquid, which can isolate the air to prevent the evaporation of reagents and the interference of carbon dioxide, while protecting the safety of the operator. It can also choose to test 1 to 6 oil samples at a time, meeting the needs of diverse sample detection.   Experimental instruments The SH108A fully automatic oil acid value tester developed and produced by Shandong Shengtai Instrument Co., LTD 2. Instrument accessories (including 6 sample oil cups, 6 stirring magnetic rods, 1 bottle of extraction solution, 1 bottle of neutralization solution, power cord, fuse, etc.)    

Common petroleum carbon residue analysis methods include the micro method (corresponding to the SH109 Automatic Carbon Residue Tester) and the Conradson method (GB/T268). Micro Method (SH109 Automatic Carbon Residue Tester) - Scope of application: Its results are consistent with the Conradson method (GB/T268). It is suitable for testing petroleum products composed of distillate oils with carbon residue values below 0.10% (m/m), and can also measure those with values between 0.10% (m/m) and 30.0% (m/m). - Principle: Put the weighed sample into a sample tube. Under an inert nitrogen atmosphere, heat it to 500℃ according to a specified temperature program. Volatile substances generated are carried away by nitrogen, and the percentage of residual carbonaceous residue relative to the original sample is the micro carbon residue value. - Features: High automation (auto-calculation, optional printing, real-time process display), precise control (stable temperature, ±2.0℃ constant temperature at 500℃), and strong practicality (data storage, multi-specification test tube adaptation). Conradson Method (GB/T268) - Scope of application: A traditional method for determining petroleum carbon residue, with results consistent with the micro method. - Overview: Heat a certain amount of sample in a Conradson tester crucible to evaporate, crack and burn it. After combustion, cool and weigh the residual carbonaceous residue, expressed as a percentage of the sample mass. - Features: High data recognition, but lower automation, longer time-consuming, and higher requirements for operators' standardization compared with the micro method.

Petroleum demulsifiers play a key role in the petroleum industry, and their core mechanism of action and practical applications are mainly reflected in the following aspects: firstly, the demulsification mechanism adjusts the interfacial tension by rapidly dispersing surface active ingredients to the oil-water interface, significantly reducing the interfacial tension (which can be reduced by more than 50%), causing the emulsion film to rupture, water droplets to aggregate and settle. Charge neutralization and coagulation of acidic demulsifiers disrupt the stability of emulsifiers through ion exchange, while alkaline demulsifiers break down the emulsion layer by adjusting the pH value. Both can accelerate oil-water separation. 2、 Industrial application value: Optimizing crude oil production to improve crude oil dehydration efficiency, achieving a standard water content of ≤ 0.5% for export, increasing oil recovery rate by 5-15%, directly improving economic benefits, equipment and process protection to prevent pipeline blockage and pump valve wear caused by emulsion, extending equipment life by more than 30%, reducing subsequent treatment agent dosage, reducing sludge oil content, and supporting environmental compliance to effectively separate emulsified oil from wastewater (removal rate>90%), meeting discharge standards. Performance advantages, fast response: Most demulsifiers can complete oil-water separation within 30 minutes. Broad spectrum adaptability: suitable for different pH values (2-12) and temperature conditions (-20 ℃ to 150 ℃). Economy: Compared with traditional methods, it can reduce processing costs by 20-40%. Note: In practical applications, the type of demulsifier needs to be selected according to the characteristics of the crude oil (such as API degree and salt content). It is recommended to determine the optimal dosage through laboratory trials (usually 50-500ppm). SD8022 Lubricating Oil Demulsibility Characteristics Tester is suitable for measuring the ability of oil and water to separate in medium and high viscosity lubricating oils. Lubricating oil anti emulsification tester complies with GB/T8022. ASTM D2711 Using digital tube temperature display, easy to use and operate. The instrument can simultaneously separate one sample. Adopting PID temperature control technology, the temperature control accuracy is high.  

Hydrocarbons are the core components of petroleum. Their freezing point and pour point are key indicators for evaluating the low-temperature fluidity of oil products, directly affecting the storage, transportation and use of petroleum products such as diesel and lubricating oil in low-temperature environments.   The freezing point and pour point vary with the composition of hydrocarbons (such as wax content) : the higher the wax content, the more likely it is to crystallize at low temperatures, and the freezing point and pour point are usually higher, resulting in poorer low-temperature fluidity of the oil. By adjusting the composition (such as adding pour point depressants), its low-temperature performance can be optimized to meet the demands of different scenarios. The determination of the freezing point and pour point of hydrocarbons hinges on the use of professional instruments to simulate a low-temperature environment and capture the critical temperature at which they lose fluidity due to waxy crystallization. The SH113 fully automatic freezing point and pour point tester is designed in accordance with the national standards GB510-2018 "Determination of Freezing Point of Petroleum Products - Automatic Micro Method" and GB3535-2006 "Determination of Pour Point of Petroleum Products". It is suitable for scenarios such as lubricating oil factories, power plants, railways, and petroleum companies, and can be used to determine light oil hydrocarbons.   Instrument features: With the MCS-51 series single-chip microcomputer as the control core and combined with semiconductor refrigeration technology, it realizes automatic refrigeration temperature control (temperature control accuracy ±0.1℃, measurement range 50℃ to -70℃) and automatic detection. Equipped with a color LCD display and a Chinese human-machine dialogue interface, it features guided operation and requires no manual intervention throughout the process. The measurement repeatability is high (freezing point 1℃, pour point 2℃), the cooling speed is fast (10 minutes >40℃), the cooling limit depth is > 70℃, and it meets the operating conditions of a cooling water pressure of 0.5kg/cm² and a flow rate of 1.6 liters/min. The determination of the freezing point and pour point of hydrocarbons, petroleum products, etc. is of great significance.