JB/T 6428-2000 Non-lubricated reciprocating piston high-purity nitrogen compressor
Some standard content:
ICS71.100.20
J76
JB
Machinery Industry Standard of the People's Republic of China
JB/T6428-2000
Non-lubricated reciprocating piston high-purity nitrogen compressor High purity nitrogen compressors of nonlubricatedreciprocatingtype
Released on 2000-08-31
National Machinery Industry Bureau
Released
Implemented on 2000-12-01
JB/ T6428-2000
Foreword
This standard is a revision of JB/T6428-92 "Unlubricated Reciprocating Piston High Purity Nitrogen Compressor". Compared with JB/T6428-92, the main technical content of this standard has changed as follows: the C-level requirements specified in JB/TQ683 in 4.4 have been cancelled, and specific numerical expressions are used for vibration intensity; - new regulations have been added to performance tests; || tt||Considering that full-load parking may cause damage to the compressor, the requirement for automatic interlocking parking was canceled in 5.4; the noise assessment sound pressure level was changed to sound power level. This standard replaces JB/6428-92 from the date of implementation. This standard is proposed and managed by the Technical Committee for Standardization of Gas Separation and Liquefaction Equipment in the Mechanical Industry. This standard was drafted by: Sichuan Air Separation Equipment (Group) Co., Ltd. The main drafters of this standard: Zhang Chaoling and Chen Xinggen. Scope
Machinery Industry Standard of the People's Republic of China
Highpuritynitrogen compressorsofnonlubricatedreciprocating type
JB/T6428-2000
Replace JB/T6428- 92
This standard specifies the basic parameters, technical performance, technical requirements, test methods, inspection rules and markings, packaging and storage of non-lubricated reciprocating piston high-purity nitrogen compressors (hereinafter referred to as compressors). This standard is applicable to bottle filling compressors with a suction pressure of 0.002~0.020MPa, a nominal discharge pressure of 16MPa, and a nominal volumetric flow rate of not more than 400m/h.
Note: The pressures in this standard are all gauge pressures.
2 Reference standards
The provisions contained in the following standards constitute provisions of this standard by being quoted in this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the following standards. GB150—1998
GB/T 4980—1985
GB/T 5831—1986
GB/T5832.2—1986
GB/T7022—1986||tt ||GB/T 7777-1987
GB/T 9438—1999
GB/T 94391988
GB/T 13279—1991
GB/T 13306—1991
GB/T 13384—1992
GB/T13819—1992
JB/T 6431—1992
JB/T6892—1993
JB/T 91041999
JB/T 9105—1999
Steel pressure vessels
Determination of noise and sound power level of positive displacement compressors Engineering method Determination of trace oxygen in gas Colorimetric method||tt ||Dew point method for determination of trace amounts of moisture in gas
Simple method for determination of noise and sound power level of positive displacement compressors Measurement and evaluation of mechanical perturbation of reciprocating piston compressors Aluminum alloy castings
Gray iron castings|| tt||Technical conditions label for general fixed reciprocating piston air compressors
General technical conditions for mechanical and electrical product packaging
Copper alloy castings
Technical conditions for gray iron castings for positive displacement compressors reciprocating Piston Oxygen Compressor Performance Test Method Technical Conditions for Ductile Iron Castings for Positive Displacement Compressors Technical Conditions for Large Reciprocating Piston Compressors
"Pressure Vessel Safety Technical Supervision Regulations" 3 Basic Parameters
a) Gas suction purity (Oxygen content, moisture content, etc.) According to the contract or agreement; the National Machinery Industry Bureau approved the implementation on 2000-12-01 on 2000-08-31
1
b) Suction pressure 0.002~0.020MPa ;
c) Suction temperature 35℃;
d) Nominal exhaust pressure 16MPa;
e) Cooling water inlet temperature 30℃.
Technical Performance
JB/T-6428—2000
4.1 The volumetric flow rate of the compressor is measured at the exhaust port, converted into the suction state, and should not be less than 95% of the nominal volumetric flow rate . 4.2 The volume specific energy, noise and sound power level, and cleanliness of the compressor are as specified in Table 1. Table 1
nominal volumetric flow
m/h
<60
60~180
>180-400
volume specific energy
kW·h/m
≤0.32
≤0.31
≤0.30
Noise sound power level
dB(A)| |tt||≤108
≤112
≤112
4.3 The cooling water consumption of the compressor shall not exceed 40L/m, and the water quality shall be as specified in Table 2. Table 2
Project name
Acidity and alkalinity (pH value)
Suspended solid content mg/L
Total hardness mmol/L
4.4 Compressor operation requirements Smooth, the vibration intensity of the compressor is not greater than 45mm/s. Number
7~8
Value
≤100
2.14
4.5 The operation rate of the compressor under normal operating conditions is not less than 90%. The rate is calculated according to formula (1): operation rate_740(h)-obstruction downtime ()x100%7440(h)
4.6 The replacement period of the main wearing parts of the compressor is as specified in Table 3. Table 3
Name of wearing parts
Piston ring
Guide ring
Sealing ring
Valve plate
Kuobianzi||tt ||Buffer sheet
≤3MPa
>2500
Working pressure
Cleanliness
mg
≤700
≤ 900 | -*(VV)2
(1)
h
5 Technical requirements
JB/T6428-2000
5.1 The compressor should comply with this standard requirements and be prepared in accordance with drawings and technical documents approved through prescribed procedures. 5.2 A sensitive opening and closing safety or interlocking protection device should be installed after each stage of the compressor to ensure that the pressure between stages does not exceed 12% of the nominal value, and the pressure of the final stage does not exceed 10% of the nominal value.
5.3 The compressor design should consider that the pressure in the cylinder near the stuffing box (sealer) side is always higher than the atmospheric pressure. 5.4 The compressor should have the following alarm devices. 5.4.1 When the suction pressure of stage 1-- is lower than the specified limit value, an alarm should be given. 5.4.2 An alarm should be issued when the cooling water pressure is lower than the specified limit value. 5.4.3 An alarm should be issued when the lubricating oil pressure is lower than the specified value. 5.4.4 An alarm should be given when the final stage exhaust pressure is higher than the specified limit value. 5.4.5 An alarm should be given when the exhaust temperature at each level is higher than the specified limit value. 5.5 The compressor does not allow oil mist, air, water, etc. to enter the cylinder and pollute the high-purity nitrogen. 5.6 The lubricating oil used in the compressor should be clean. The oil filter installed in the lubricating oil pressure circulation system should be able to remove mechanical inclusions that are enough to scratch the friction surface. The oil pressure can be adjusted according to the usage requirements. 5.7 The design and manufacturing of compressor pressure vessels should comply with the "Pressure Vessel Safety Technical Supervision Regulations" and GB150. 5.8 There should be no leakage in gas lines, oil lines, and water lines. 5.9 The air chamber of the pressure-bearing parts such as the cylinder, cylinder head, and piston body of the compressor shall be subjected to a hydraulic pressure test at a pressure of 1.5 times the design pressure, and the water chamber shall be subjected to a hydraulic pressure test at a pressure of 0.6MPa, and all shall be maintained without leakage for 30 minutes. 5.10 Set buffer containers at the suction and exhaust ports of each stage of the cylinder as needed. 5.11 When the first-stage suction temperature does not exceed 40°C, the cooling water inlet temperature does not exceed 35°C, and the final-stage exhaust pressure is the nominal exhaust pressure, measure at twice the pipe diameter behind the exhaust port flange of each stage. The resulting exhaust temperature shall not exceed 160°C. 5.12 When the ambient temperature does not exceed 40°C, the overflow of lubricating oil in the compressor crankcase shall not exceed 60°C. 5.13 Cylinders, pistons, connecting pipes and other parts that come into contact with nitrogen should be made of anti-rust materials or undergo anti-rust treatment, and the materials used should comply with relevant standards.
The cast iron parts of the 5.14 compressor should comply with the regulations of GB/T9439, JB/T6431 and JB/T9104. The copper alloy and aluminum alloy castings should comply with the regulations of GB/T13819 and GB/T9438 respectively. The cast iron parts of the 5.15 compressor Steel castings should comply with the requirements of JB/T9105. 5.16 Assembly and painting of compressor
5.16.1 All parts of the compressor (including purchased parts) should be assembled after passing the inspection. 5.16.2 During assembly of the compressor, the following items should be tested according to the product drawings and technical documents: a) The clearance between the inner and outer dead centers of the pistons at all levels;
b) The radial direction of the crosshead slideway and the crosshead Clearance and contact conditions: c) radial clearance between the crank pin (crankshaft journal) and the connecting rod big head shoe: d) radial clearance between the main journal and the main bearing; e) radial clearance between the crosshead pin and the connecting rod big head shoe: f) Coaxiality between the center line of the cylinder and the center line of the crosshead slide of the same level. JB/T6428—2000
5.16.3 The outer surface of the compressor should be cleaned and painted according to the drawings. The painted surface should be flat, smooth and consistent in color. 5.17 Scope of supply of compressor:
a) Compressor main engine (including motor, bottom rail and ancillary devices); b) Instruments and electronic control devices;
c) Spare wearing parts: | |tt||d) Special tools:
e) Random technical files.
5.18 Under the condition that the user abides by the product instruction manual, within 18 months from the date of shipment from the manufacturer, and the operating time does not exceed 1 year, the product will be damaged due to poor manufacturing (excluding vulnerable parts) parts), the manufacturer shall be responsible for repair or replacement. 6 Test methods and inspection rules
6.1 Each component of the compressor and the entire unit shall be inspected by the quality inspection department of the manufacturer in accordance with the relevant provisions of this standard and in accordance with the drawings and technical documents approved by the prescribed procedures. If the contract provides otherwise, users can also participate in the inspection and acceptance of relevant projects. 6.2 The noise measurement of the compressor shall be carried out in accordance with the provisions of GB/T4980 or GB/T7022. 6.3 The vibration measurement of the compressor shall be carried out in accordance with the provisions of GB/T7777. 6.4 The performance test of the compressor shall be carried out in accordance with the provisions of JB/T6892. 6.5 The cleanliness inspection method of the compressor shall be in accordance with the provisions of GB/T13279. 6.6 Check the purity of the gas at the inlet and outlet of the compressor. Under normal operating conditions, take a sample twice the diameter from the flange end of the inlet and exhaust port, and measure the oxygen content and moisture content in the gas. The measurement of trace oxygen shall be in accordance with the provisions of GB/T5831, and the measurement of trace moisture shall be in accordance with the provisions of GB/T5832.2. 6.7 Trial-produced compressors should undergo type testing. During the type testing, the continuous operation time at full load should be no less than 500 hours. During operation, check the working conditions of all mechanisms of the compressor and its ancillary devices, and measure the compressor volume flow, shaft power, rotation speed, suction and exhaust pressure and temperature at all levels, lubricating oil and cooling water temperatures, and cooling water consumption. At the same time, the vibration and noise of the compressor should also be measured, as well as the changes in gas purity at the inlet and outlet of the compressor. After the test, disassemble the machine and check the wear of the friction surfaces of each moving part and the wearing parts. 6.8 Each compressor should undergo a factory test. During the factory test, the full-load continuous operation time should be no less than 4 hours. The working conditions of all mechanisms of the compressor and its affiliated mechanisms should be checked, and the volumetric flow, shaft power, rotation speed, first-stage suction and Parameters such as exhaust pressure at all levels, suction and exhaust temperatures at all levels.
6.9 For batch-produced compressors, sampling tests should be carried out in accordance with the provisions of Table 4. During the sampling test, the full-load operation time should be no less than 48 hours. During the test process, the working conditions of all mechanisms of the unit should be checked, and the volume should be measured. Flow, shaft power, rotational speed, the force of one-stage suction and exhaust at all levels, and the suction and exhaust temperatures at all levels. After the random inspection test, disassemble the machine and check each friction surface to determine whether the wear of the consumable parts is normal. Table 4bzxZ.net
Annual output
Number of shaft inspections
Marking, packaging and purchase and transportation
20
7.1 The packaging of the compressor should comply with GB/T13384 Regulation. >2050
2
>50
3
7.2 The compressor main engine and ancillary devices should be treated with anti-rust treatment to ensure that there will be no rust within 12 months after delivery. Poorly packaged and corroded. 4
台
7.3 Each compressor should be accompanied by at least the following documents: a) Product certificate of conformity:
b) Product instruction manual;
JB/T6428- -2000
c) Random drawings (including as-built drawings of pressure vessels); d) Packing list.
7.4 Each compressor should have a product nameplate. The nameplate should comply with the regulations of GB/T13306 and be fixed in a visible location. The nameplate should have at least the following content:
a) Product model and name
b) Nominal volume flow plate, m\/min;
e) Nominal exhaust pressure, MPa:
d) Shaft power, kw:
e) Speed, r/min;
f) Weight, kg:
g) Factory number; ||tt| |h) Year and month of manufacture;
i) Name of manufacturer.
7. Trial-produced compressors should undergo type testing. During the type testing, the continuous operation time at full load should be no less than 500 hours. During operation, check the working conditions of all mechanisms of the compressor and its ancillary devices, and measure the compressor volume flow, shaft power, rotation speed, suction and exhaust pressure and temperature at all levels, lubricating oil and cooling water temperatures, and cooling water consumption. At the same time, the vibration and noise of the compressor should also be measured, as well as the changes in gas purity at the inlet and outlet of the compressor. After the test, disassemble the machine and check the wear of the friction surfaces of each moving part and the wearing parts. 6.8 Each compressor should undergo a factory test. During the factory test, the full-load continuous operation time should be no less than 4 hours. The working conditions of all mechanisms of the compressor and its affiliated mechanisms should be checked, and the volumetric flow, shaft power, rotation speed, first-stage suction and Parameters such as exhaust pressure at all levels, suction and exhaust temperatures at all levels.
6.9 For batch-produced compressors, sampling tests should be carried out in accordance with the provisions of Table 4. During the sampling test, the full-load operation time should be no less than 48 hours. During the test process, the working conditions of all mechanisms of the unit should be checked, and the volume should be measured. Flow, shaft power, rotational speed, the force of one-stage suction and exhaust at all levels, and the suction and exhaust temperatures at all levels. After the random inspection test, disassemble the machine and check each friction surface to determine whether the wear of the consumable parts is normal. Table 4
Annual output
Number of shaft inspections
Marking, packaging and purchase and transportation
20
7.1 The packaging of the compressor should comply with GB/T13384 Regulation. >2050
2
>50
3
7.2 The compressor main engine and ancillary devices should be treated with anti-rust treatment to ensure that there will be no rust within 12 months after delivery. Poorly packaged and corroded. 4
台
7.3 Each compressor should be accompanied by at least the following documents: a) Product certificate of conformity:
b) Product instruction manual;
JB/T6428- -2000
c) Random drawings (including as-built drawings of pressure vessels); d) Packing list.
7.4 Each compressor should have a product nameplate. The nameplate should comply with the regulations of GB/T13306 and be fixed in a visible location. The nameplate should have at least the following content:
a) Product model and name
b) Nominal volume flow plate, m\/min;
e) Nominal exhaust pressure, MPa:
d) Shaft power, kw:
e) Speed, r/min;
f) Weight, kg:
g) Factory number; ||tt| |h) Year and month of manufacture;
i) Name of manufacturer.
7. Trial-produced compressors should undergo type testing. During the type testing, the continuous operation time at full load should be no less than 500 hours. During operation, check the working conditions of all mechanisms of the compressor and its ancillary devices, and measure the compressor volume flow, shaft power, rotation speed, suction and exhaust pressure and temperature at all levels, lubricating oil and cooling water temperatures, and cooling water consumption. At the same time, the vibration and noise of the compressor should also be measured, as well as the changes in gas purity at the inlet and outlet of the compressor. After the test, disassemble the machine and check the wear of the friction surfaces of each moving part and the wearing parts. 6.8 Each compressor should undergo a factory test. During the factory test, the full-load continuous operation time should be no less than 4 hours. The working conditions of all mechanisms of the compressor and its affiliated mechanisms should be checked, and the volumetric flow, shaft power, rotation speed, first-stage suction and Parameters such as exhaust pressure at all levels, suction and exhaust temperatures at all levels.
6.9 For batch-produced compressors, sampling tests should be carried out in accordance with the provisions of Table 4. During the sampling test, the full-load operation time should be no less than 48 hours. During the test process, the working conditions of all mechanisms of the unit should be checked, and the volume should be measured. Flow, shaft power, rotational speed, the force of one-stage suction and exhaust at all levels, and the suction and exhaust temperatures at all levels. After the random inspection test, disassemble the machine and check each friction surface to determine whether the wear of the consumable parts is normal. Table 4
Annual output
Number of shaft inspections
Marking, packaging and purchase and transportation
20
7.1 The packaging of the compressor should comply with GB/T13384 Regulation. >2050 | Poorly packaged and corroded. 4
台
7.3 Each compressor should be accompanied by at least the following documents: a) Product certificate of conformity:
b) Product instruction manual;
JB/T6428- -2000
c) Random drawings (including as-built drawings of pressure vessels); d) Packing list.
7.4 Each compressor should have a product nameplate. The nameplate should comply with the regulations of GB/T13306 and be fixed in a visible location. The nameplate should have at least the following content:
a) Product model and name
b) Nominal volume flow plate, m\/min;
e) Nominal exhaust pressure, MPa:
d) Shaft power, kw:
e) Speed, r/min;
f) Weight, kg:
g) Factory number; ||tt| |h) Year and month of manufacture;
i) Name of manufacturer.
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