HG/T 3138-1998 Technical Specifications for JX Type Screen Residue Tester HG/T3138-1998 Standard download decompression password: www.bzxz.net

HG/T 3138--1998
This standard adopts the international standard ISO787/18-1983 "Determination of sieve residue of raw materials--Mechanical flushing method". The main parameters of the technical conditions of the sieve residue measuring instrument adopt the technical requirements of 6.1 mechanical flushing device in GR5211.14-86 "Determination of sieve residue of pigments--Mechanical flushing method". It provides advanced testing methods to improve the testing accuracy of my country's coatings and pigments industry, get closer to international standards, and conduct international technical exchanges.
This standard is proposed by China National Chemical Equipment Corporation. This standard is under the jurisdiction of the Technical Committee for Standardization of Chemical Special Instruments and Meters of the Ministry of Chemical Industry. The drafting unit of this standard is Guangxi Wuzhou Xinhua Battery (Group) Co., Ltd. The main drafters of this standard are Zhao Shaosheng, He Jijian, 785
1 Scope
Chemical Industry Standard of the People's Republic of China
Technical conditions of JX type techoicul conditiuns of the sieve remains tester menyural instrumentHG/T 3138--1998
This standard specifies the classification and naming, requirements, test methods, inspection rules, marking, packaging, transportation and storage of sieve residue measuring instruments. This standard is applicable to sieve residue measuring instruments for measuring the sieve residue of materials and body pigments dispersed in water or other powders or granules insoluble in water.
2 Cited standards
The provisions contained in the following standards constitute the text of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and the parties using this standard should discuss the possibility of using the latest version of the following standards. CB/T13384-92 General technical conditions for packaging of electromechanical products 3 Definitions
This standard is based on the following definitions,||tt ||Sieve residues
Residues on the sieve under specified test conditions. 4 Classification and naming
4.1 Model compilation method
Sieve mesh aperture specification M, see table]
The first capital letter of the Chinese pinyin of the word "洗" in the flushing method and the first capital letter of the Chinese pinyin of the word "机" in the machinery 4.2 Sieve mesh specifications
Sieve mesh specifications should meet the requirements of Table 1,
Sieve mesh specifications
Sieve mesh aperture
The Ministry of Chemical Industry of the People's Republic of China approved 786 on March 23, 1998
Sieve mesh outer diameter
Implementation on January 1, 1999
5 Requirements
HG/T 3138—1998
5.1 The screen residue measuring instrument shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 5.2 Working environment
5.2.1 Ambient temperature: 5℃~40C.
5.2.2 Relative humidity: ≤80%.
5.3 Screen
The screen material is 0Cr18Ni9 or 1Cr18Ni9Ti: The screen size shall comply with the requirements of Table 2. Table 2wwW.bzxz.Net
5.4 Water spray hole
Aperture 1 mm±(3. 2 mm
Sieve size deviation
Mesh wire diameter
Mesh wire diameter adjustment
5.5The filtered water is used as the flushing liquid, and the water pressure is 0.3MPa--0.5MPa. The water flow rate is 5I./min, and the longest duration does not exceed 10min.
5. 6 Water storage
The volume of the water storage should be no less than 80L, and the water tank should be tested for water pressure at 0.625MPa. 5.7 Insulation resistance
When the ambient temperature is 5°C-40°C and the relative humidity is ≤30%, the insulation resistance between the power supply input terminal and the ground terminal of the instrument should be greater than 20 mN.
5.8 Dielectric strength
When the ambient temperature is 5°C-40°C and the relative humidity is ≤80%, the insulation strength test between the power supply input terminal and the instrument casing can withstand a 50Hz sinusoidal voltage of 1000V for 1 minute, without any puncture or flying phenomenon. 5.9 Appearance
The surface coating of the instrument and parts should be smooth and intact, without defects such as peeling and scratching, and the fasteners should not be loose. 6 Test method
6.1 The environmental conditions during the test should meet the requirements of 5.2. 6.2 Screen size: Use a micrometer with a graduation value of 0.02mm to measure the diameter of the mesh wire, which should meet the requirements of 5.3. 6.3 The diameter of the water spray hole
is measured with a stop plug gauge, which should meet the requirements of 5.4. 6.4 Water pressure is measured with a precision 2.5 level 1.0MPa pressure gauge. Water flow measurement: Under normal working conditions, use a precision 1 level flow meter to measure.
Continuous flushing time: Under normal working conditions, turn on the drain valve and measure the time from the beginning to the end of the water discharge with a stopwatch, which should meet the requirements of 5.5.
6.5 Water storage tank capacity, pressure resistance
6.5.1 Water storage capacity Add water to the water tank to the overflow port, open the drain valve. Use a 5L measuring cylinder to measure, which should meet the requirements of 5.6. 6.5.2 Water storage pressure resistance: Add water to the water tank to the overflow port, close the overflow valve and drain valve, and then slowly increase the pressure to 0.625MPa, hold for 20 minutes, the tank body should have no leakage, deformation or abnormal sound. 787
6.6 Insulation resistance
HE/T 3138--1998
Use a 500V megohmmeter to measure the resistance between the power supply line terminal and the ground terminal of the device, which should meet the requirements of 5. 6.7 Insulation voltage
Apply test voltage between the power supply line terminal and the instrument housing ground terminal. During the test, the test voltage should be slowly raised to 1000V and maintained for 1 minute. Observe for breakdown or arcing, then slowly reduce to zero value and cut off the power supply. It should meet the requirements of 5.8. 6.8 Appearance
Visual inspection should meet the requirements of 5.
7 Inspection rules
7.1 Each instrument must be manufactured and inspected according to the technical requirements of this standard, and be accompanied by a product factory certificate. 7.2 Instrument inspection is divided into factory inspection and type inspection. 7.2.1 The inspection items are carried out according to 5.1.5.3,5.4,5.6 and 5.9. 7.2.2 Type inspection
7.2.2.1 The instrument shall be subjected to type inspection in any of the following cases: a) When the instrument's design, process, components and materials have been greatly improved; b) During batch production, a type inspection shall be carried out every three years; d) During trial production and adjustment of new products.
7.2.2.2 Type inspection items include all technical requirements in addition to factory inspection items. 7.2.2.3 Type inspection Three or one thousand units shall be selected from the products of factory inspection for inspection. If there are unqualified items in the inspection results, the inspection shall be repeated and the unqualified items shall be inspected on a month or a day. If there are still unqualified items on a day, the type inspection shall be judged as unqualified. 8 Marking, packaging, transportation and storage
1 Marking
Each instrument should be fixed with a clear chrome plate, which contains: a) Name, model:
b) Product number +
c) Manufacturer's name:
d) Ex-factory date,
82 Packaging
82.1 The product should be fixed on the bottom plate of the packaging water tank with screws and covered with a plastic bag. 8.2.2 The accessories should be fixed on the instrument with foam. 8.2.3 Random documents include:
a) Product certificate;
b) Instruction manual;
c) Packing list.
8.2.4 The outer packaging should comply with the provisions of (B/T13384. 8.3 Transportation and storage
The transportation should be rainproof and moisture-proof.
The product should be stored in a dry, ventilated and corrosion-free place.
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