Some standard content:
Chemical Industry Standard of the People's Republic of China
HG/T 2114~2115-91
Technical Conditions for Low Flash Point Tester
Technical Conditions for Rotary Paint Coater
Published on August 19, 1991
Ministry of Chemical Industry of the People's Republic of China
Implementation on January 1, 1992
HG/T2114-91
HG/T 2115-91
Technical conditions for low flash point tester
Technical conditions for rotary paint coater
Chemical Industry Standard of the People's Republic of China
Technical conditions for low flash point testerwwW.bzxz.Net
Subject content and scope of application
HG/T2114-91
This standard specifies the technical requirements, test methods and inspection rules for low flash point tester. This standard is applicable to low flash point tester for coatings, solvents, petroleum and related products by rapid equilibrium method (hereinafter referred to as instrument) 2 Reference standards
GB7634 Determination of low flash point of petroleum and related products - Rapid equilibrium method ZBY002 Basic environmental conditions and test methods for transportation and storage of instruments and meters 3 Instrument type and structural dimensions
3.1 The instrument type is closed cup type
3.2 The structural dimensions are 405mm×300mm×280mm 4 Technical requirements
4.1 Normal working environment conditions
4.1.1 Ambient temperature: 0~40℃:
4.1.2 Ambient humidity: not more than 85%;
4.1.3 There should be no corrosive, flammable or explosive gases in the surrounding air;4.1.4 Power supply voltage: 380V±5%, 50±1Hz;4.2 Minimum test temperature: -40 (water inlet temperature is 15c);4.3 Temperature display error: less than 0.5C;
4.4 Program time preset: 0~60s;
4.5 Time display: 060s;
4.6 Program ignition test time: 2.5±0.5s.4.7 Instrument structure
The instrument consists of a test cup, a test cup cover, a slide plate, an igniter, a semiconductor cooling stack, a temperature controller, a digital temperature display and an automatic timing slide plate switch device.
Figure 1 is its schematic diagram
Approved by the Ministry of Chemical Industry of the People's Republic of China on August 19, 1991 and implemented on January 1, 1992
Digital temperature display
Temperature controller
DC regulated power supply
HG/T2114-91
Timer switch
Figure 1 Schematic diagram
1 Test cup; 2—Test cup cover: 3—Thermistor; Time counter
Ignition device:
5—Slide plate; 6—O-type sealing ring; 7—Semiconductor cooling stack 4.7.1 Test cup
Reversible motor
The test cup is made of brass or other metal blocks with good thermal conductivity. The metal block has a cylindrical groove with a depth of 10.0 mm and a diameter of 49.7 mm.
There is a round hole on the side for inserting the thermistor
Figure 2 Test cup
4.7.2 Test cup cover
The test cup cover and the test cup should be in close contact: and the center line of the three holes of the test cup cover should be located on the diameter of the test cup. The test cup cover is equipped with a switchable slide plate.
4.7.3 Slide plate
HG/T2114—91
Figure 3 Test cup cover
When the slide plate on the test cup cover is in the open position, the two holes on the slide plate should completely overlap with the corresponding two holes on the test cup cover; when the slide plate is in the closed position, the three holes on the test cup cover should be completely closed. 12.8||tt| |4.7.4 Ignitor
Figure 4 Slide plate
The diameter of the nozzle is 1.6mm, and the flame should be able to be adjusted to make it close to a spherical shape. The diameter is 3~4mm. The ignition fuel is a combustible gas, such as butane, etc.
4.7.5 Refrigeration device
The thermoelectric effect of semiconductor materials is used to achieve refrigeration. The refrigeration device should be equipped with a temperature controller to stabilize the temperature of the test cup at the required temperature.
4.8 Constant temperature accuracy of test cup
When the test cup is kept at different temperatures, the fluctuation range of the thermometer display value does not exceed ±0.2C. HG/T2114-91
4.9 Precision of the instrument
The reliability of the results is judged by the following provisions (confidence rate is 95%). 4.9.1 Repeatability
The absolute difference between the two test results of the same sample shall not exceed 2℃. 4.9.2 Reproducibility
The absolute difference between the two test results of the same sample tested in different laboratories shall not exceed 3℃. 4.10 Syringe
The capacity of the syringe is 2mL and the accuracy is ±0.1mL.
4.11 Maximum power consumption
4.12 Influence of power supply voltage fluctuation
When the power supply voltage changes within the range of 380V±5%, it shall comply with the requirements of Articles 4.2, 4.3 and 4.9 of this standard. 4.13 Insulation resistance
When the ambient temperature is 25±5℃ and the relative humidity is not more than 85%, the resistance between the power supply line and the instrument casing shall be greater than 20Mo.
4.14 Transportation environment requirements
The instrument shall meet the requirements of ZBY002 under the conditions of transportation packaging. 4.15 Appearance requirements
The surface covering of the instrument housing and parts should be smooth and intact, without defects such as peeling and damage, and the fasteners should not be loose. 5 Test method
5.1 Test conditions
Should meet the requirements of Article 4.1.
5.2 Appearance
Perform in accordance with the requirements of Article 4.15.
5.3 Ignitor test
Ignite the ignitor and adjust the flame to be close to a sphere, with a diameter of 3 to 4 mm. 5.4 Ignition test time
Open the slide plate, extend and remove the igniter, close the slide plate, and complete an ignition test. The time is 2.5±0.5s. 5.5 Test cup constant temperature accuracy test
Insert the digital thermometer into the round hole on the side of the test cup and cool the instrument. Select two temperature points, -20℃ and -30℃, for testing respectively. When the selected temperature reaches stability, record once every 5min, for a total of five times. Each temperature fluctuation shall not exceed ±0.2℃. 5.6 Precision test
5.6.1 Repeatability test
Select samples with flash point temperatures of -5℃, -20℃ and -30℃, and conduct two tests respectively. The absolute difference should meet the requirements of Article 4.9.1.
5.6.2 Reproducibility test
Select samples with flash point temperatures of -5℃, -20℃ and -30℃, and conduct two tests respectively in different test rooms. The absolute difference should meet the requirements of Article 4.9.2.
5.7 Power supply voltage fluctuation effect test
Use a voltage regulator to make the power supply voltage vary between 380V±5%, which meets the requirements of Article 4.12.5.8 Insulation resistance test
Use a 500V megohmmeter to measure the insulation resistance between the power cord and the casing of the power supply. The result is The result shall meet the requirements of Article 4.13. 4
HG/T2114-91
5.9 Transport environment test
Put the packaged instrument in the rear of the car and run it on a third-class highway at a speed of 40km/h for 200km. If adjustments are allowed, test it according to Articles 4.3, 4.8, 4.9, 4.13 and 4.15 of this standard. The result shall meet the requirements of the corresponding articles.
6 Inspection rules
Instrument inspection is divided into factory inspection and type inspection. 6.1 Factory inspection
Factory inspection of each instrument shall be carried out under the conditions of Article 4.1 according to the requirements of Articles 4.2, 4.3, 4.6, 4.8, 4.9, 4.12~4.15 of this standard and the corresponding test methods.
6.2 Type inspection
The instrument needs to be type inspected in one of the following situations: 6.2.1
After the test of the new design prototype is completed;
When identifying new products;
When there are major changes in product design, process, components and materials used; When batch-produced products are regularly inspected;
e. When the production is stopped for more than one year and then put into production again,
6.2.2 Type inspection content includes all test contents of this standard. Regular inspection is carried out for type inspection. Generally, it is inspected once a year, and no less than 2 units are inspected each time. 6.2.3
6.2.4 Type inspection is carried out on products that have passed the factory inspection. If there are unqualified items in the inspection results, double the number of samples should be taken to inspect the unqualified items or all items. If there are still unqualified items, the type inspection fails and the batch of products fails. 1
Marking and packaging
7.1. Marking
Fix a nameplate at an appropriate position on the instrument casing. The nameplate should indicate: manufacturer name;
name and model;
product number:
date of manufacture.
7.2 Packaging
7.2.1 The instrument and accessories shall be packed in accordance with the provisions of the relevant packaging technical documents. The technical documents accompanying the instrument packing are: product certificate:
instruction manual;
c. packing list.|| tt||7.2.2 Markings on the outside of the packaging box
Should indicate words or symbols such as "Handle with care", "Moisture-proof", "Do not invert", etc. Additional notes:
This standard was proposed by China National Chemical Equipment Corporation HG/T2114-91
This standard is under the jurisdiction of the technical unit responsible for standardization of chemical-specific instruments and meters of the Ministry of Chemical Industry. This standard was drafted by Guangxi Wuzhou Chemical Instrument Factory, and the main drafters of this standard were He Dayu, Lin Ping, Mai Baoxin,
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