JB/T 599-1991 Pressure gauge calibrator

JB/T 599-1991 Pressure gauge calibrator JB/T599-1991 standard download and decompression password: www.bzxz.net

Ding B
Mechanical Industry Standard of the People's Republic of China
JB/T 599—-91
Pressure Gauge Verifier
Released on 1991-07-16||tt| |Ministry of Mechanical and Electronic Industry
Released
Implemented on 1992-07-01
Mechanical Industry Standard of the People's Republic of China
Pressure Gauge Verifier
Theme Content and scope of applicationbzxZ.net
JB/T 599-91
This standard specifies the product classification, technical requirements and test methods of pressure gauge calibrators. This standard is applicable to the calibrator (hereinafter referred to as the calibrator) of general pressure gauges with a vacuum of 0.088MPa and a pressure of 250MPa. Reference standard
GB2536 Transformer Oil
GB1031
ZB Y 002 ||tt || Methods General technical conditions for instrument packaging
According to the maximum calibration pressure, the calibrator is divided into the following three types, see Table 1. Table 1
3.2 Basic Parameters
Basic Verifier Parameters should comply with the provisions of Table 2. Parameter
Number
Calibration pressure MPa
Connect lock nut with pressure gauge
Working fluid
0. 088 ~ 6
Transformer Oil | |tt | ||60
Formula
250||tt ||0~250
M33×2
Medicinal Sesame Oil
Implemented on 1992-07-01
Transformer oil should comply with GB2536 standard Provisions. Technical requirements
4.1 Normal working conditions
JB/T 599--91
The calibrator should be able to work normally under the condition that the ambient temperature is in the range of 10~30℃. 4.2 Pressure strength
calibrator shall withstand the strength and sealing test for 10 minutes under the pressure specified in Table 3. Calculated from the 6th minute, the pressure drop in the next 5 minutes should not be greater than that specified in Table 3. Table 3
Formula
4.3 Sealing property
Test pressure||tt ||9
Pressure drop value within 5 minutes
15||tt| |The sealing of the vacuum part of the Type 6 calibrator should be maintained under a negative pressure of -0.08~-0.088MPa for 5 minutes, and the vacuum value loss should not be greater than 1%. 4.3.1
4.3.2 For the sealing of the pressure part of the calibrator, load the test pressure step by step according to the test pressure specified in Table 4, and maintain it for 1 minute at each level of load. The pressure value should not drop more than that level. 1% of the load. Table.4
formula
test pressure MPa
4.4 pressure pump
60| |tt||10
Throughout the entire stroke range, the pressure should be ensured to increase or decrease evenly, and the screw should rotate smoothly without any jamming. 4.5 The needle rod of the valve
valve should rotate smoothly without any sticking. Under the test pressure specified in Table 3, the valve seals evenly without leakage when opening and closing.
4.6 Type 250 calibrator
4.6.1 The type 250 calibrator should have a safety valve. The safety valve should be able to open automatically when the low-pressure part is overpressured. 4.6.2 The surface roughness of the cylinder and piston of the Type 250 calibrator should comply with the regulations of GB1031, and the Ra parameter value is 0.10 μm. 4.7 Anti-transportation environment performance
The calibrator should comply with the regulations of ZBY002 under the conditions of transportation packaging. Among them, the high temperature test is 40℃, the low temperature test is -25℃, and the free drop height is 250mm.
4.8 Appearance surface quality
The visible part of the calibrator should be plated (coated) with an appropriate anti-corrosion layer. The anti-corrosion layer should be smooth, beautiful, uniform and strong. All marks, numbers and symbols on the calibrator should be clear and correct. 4.9 Spare parts
JR/T 599-91
Each calibrator must be equipped with no less than 5 sealing bowls for pressure pumps. 5 Test method
5.1 Test conditions
5.1.1 The load should be applied evenly under normal working conditions. 5.1.2 The detection instrument shall be a pressure gauge or vacuum gauge with an accuracy of not less than 0.4. 5.1.8 The verifier is in a horizontal position.
5.2 Compressive strength test
Under the test conditions of Article 5.1, the calibrator shall perform the compressive strength test as specified in Table 3, and observe the pressure drop value of the test instrument from the 6th minute.
5.3 Sealing test
Under the test conditions of Article 5.1, when testing the vacuum sealing of Type 6, use a pressure pump to evacuate. In order to achieve the specified true vacuum, it can be evacuated three times in a row. When the maximum vacuum value is reached and maintained for 5 minutes, observe the pressure drop value of the detection instrument. Under the test conditions of Article 5.1, when testing the pressure tightness of the calibrator, use a pressure pump to pressurize it. When reaching each level of load and maintaining it for 1 minute, observe the pressure drop value of the detection instrument. 5.4 Pressure pump test
Under the test conditions of 5.1, observe the uniform rise and fall of the pressure value of the detection instrument, and feel the smooth movement of the screw. 5.5 Valve test
Under the test conditions of 5.1, feel the smooth movement of the thimble rod, and at the same time observe whether the indication value of the detection instrument drops when the valve is opened or closed. 5.6 Type 250 calibrator test
5.6.1 Under the test conditions of 5.1, the safety test of the safety valve must be carried out first before other various tests of the complete machine can be carried out. 5.6.2 The surface roughness of the cylinder and piston of the Type 250 calibrator shall be visually inspected by comparing sample blocks. 5.7 Transport environment resistance performance test
Carry out the test according to the provisions of ZBY002, and conduct inspection according to Articles 5.2 to 5.6 after the test. 5.8 Appearance surface quality inspection
Visual inspection.
5.9 Spare parts inspection
Visual inspection.
6 Acceptance Rules
Outbound Inspection
The calibrator must be shipped from the factory one by one in accordance with the requirements of Articles 4.2 to 4.6 and 4.8 and 4.9 of this standard. Inspection. Only after passing the inspection can it leave the factory. 6.2 Type inspection
Under the following circumstances, the calibrator shall undergo type inspection in accordance with all technical requirements of this standard. a. Trial shaping of new products,
b. Regular inspection of batch production
C. When there are major changes in design, process, materials, etc., d. e. When the product resumes production after being out of production for a long period of time. When the national quality supervision agency requests type inspection. Note: It is not necessary to perform the 5.7 tests in items b and d. 3
７ Marking, packaging and storage
a manufacturer's name or trademark,
b. Product name,
C． Calibration range, MPa
d. Year and month of manufacture and product number or batch number. Packaging
JB/T599-91
The packaging of the verifier should be in accordance with the regulations of ZBY003, and the type of packaging protection is determined by the manufacturer. 7.3 Storage
The instrument should be stored in a ventilated and dry room. The indoor air should be clean and have no corrosive effect on the instrument. Additional notes:
This standard is proposed by Xi'an Industrial Automation Instrument Research Institute. This standard is under the jurisdiction and responsibility of drafting by Xi'an Industrial Automation Instrument Research Institute. From the date this standard is implemented in the country where it is implemented, the original standard JB599-78 "Pressure Gauge Calibrator" will be invalidated.
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