Some standard content:
JCS71.100.20
Standard of the Machinery Industry of the People's Republic of China
JBT9079.1-1999
Specifications for rcciprocating expanders1999-07-12 Issued
National Machinery Industry
2000-01-01 Implementation
JE/T9079.1—1999
This standard is a revision of ZHJ75025
90 Technical Specifications for Piston Expanders". During the revision, the original standard was revised and the main technical contents were changed. From the beginning of this standard, it replaces Z176025. This standard is proposed and managed by the Technical Committee for Standardization of Gas Separation and Liquefaction Equipment. The drafting unit of this standard: Handan Oxygen Generator Factory. The main drafters of this standard are: Sui Deng, Cheng Sen, Yue Bixin. This standard was first issued in October 1990. Fan Guo
Machinery Industry Standard of the People's Republic of China
Technical Conditions for Piston Expanders
Speciificutipns fur reeiprocating expandersJB079.1-1995
This standard defines the technical requirements, test methods, inspection rules and markings, packaging and maintenance of movable expanders (hereinafter referred to as simple expanders).
This standard applies to expanders used in air separation and chemical equipment. Reference Standards
The provisions contained in the following standards constitute the provisions of this standard through their use in this standard. When this standard is published, all versions are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB.T133061991 Label
GH/TT3384-1992 General Technical Conditions for Packaging of Electromechanical ProductsFB/T9079.2-1999 Performance Test Method of Active Separation Expander3 Technical Requirements
3,! Expanders shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 3.7 Under the designed normal working condition, the maximum exhaust volume of the expansion machine shall meet the requirements of the surrounding sample, and the total deviation shall not exceed 5%-10% of its nominal box. Under the designed normal working condition, the measured efficiency, noise power level and consumption index of the expansion machine shall meet the requirements of Article 1: 3.3
Performance index
Inlet temperature
270~300
160~200
Exhaust volume|| tt||m【Standard state】
SD--200
>200-500
>500-1600
>164X)
50-200
>200-500
>500~1600
Note: Standard state, i.e. the state at 0,101.325kPa, equal efficiency
The lubricating oil temperature in the axle box and the machine body should not exceed 70℃. 3.41
Four Machinery Industry High-tech Co., Ltd. approved the late sound power section of the 999-07-12
Clean pressure
2000-01-01 implementation
9079.1-1999
3.5 The average availability of the expander under normal operating conditions should not be less than 92%. Its value is calculated as follows: Ty -.
Availability within the level, %
In: 4
,—T-year effective working time, 6, (reduced = 7440h); t--…year downtime time, hbzxz.net
3. The lubricating oil used in the expander should be kept drip-free. The mesh size of the oil drainer is smaller than or equal to 0.08m. The temperature of the lubricating oil should not be less than 0.IMPa and can be adjusted. The pressure that the lubricating oil system can withstand should not be less than 0.4MPa. 3.7 After the seals of the inlet and outlet valves are adjusted normally, there should be no gas leakage. 3. After the expander is assembled, the joints of the gas circuit, oil circuit and water circuit should be sealed and should not leak. 3.9 The exposed moving parts of the expander should be covered with protective covers. 3.10 There is an overspeed resistor at the bottom of the expander. When the machine reaches 110%~115% of the design speed, it should be able to automatically stop the gas supply. 3.11 The exhaust pipe of the expander should be equipped with a limiting device, which can also be installed in the corresponding process pipeline. 3.11 The gas circuit parts such as the expander gas pipe, the inlet and outlet pipes, etc. should be subjected to water pressure test at 1.5 times the nominal pressure (gauge pressure), and the water circuit parts should be subjected to water pressure test at a pressure of 0.45MPa. The pressure holding time should be no less than 30m, and there should be no runaway phenomenon. 3.13 The replacement period of the main wearing parts of the expander should comply with the provisions of Table 2. Table 2 Main wearing parts Use and replacement period
Product name
Valve packing
2 2500
Valve head, valve spring
2 4000
3.14 The surface of the expander should be smooth and clean, the parts should be decorated, the cylinder and the intermediate body 1, the intake and exhaust valves and the regulating valves should be plated with anti-rust layer,
3.15 The expander supplied to the user should also include: a) brake motor, starting device, motor base and other auxiliary devices; b) transmission belt or other transmission parts:
Center necessary special tools:
! d Necessary spare parts, the quantity of which is sufficient for the full warranty period: e) Installation drawings. Instructions for use, certificate of conformity, packing list. 3.16 Under the conditions that the user complies with the instructions for use, the manufacturer shall provide a warranty of RMB 8,000 (excluding accessories) within 18 months from the date of shipment. If the product is damaged or cannot function properly due to poor design or manufacturing during the warranty period, the manufacturer shall repair or replace it free of charge in a timely manner.
4 Test method
The performance test method of expander shall be in accordance with the provisions of JB/T9079.2. 5 Inspection rules
5.1 Each expander shall be inspected and qualified by the technical inspection department of the manufacturing unit and can only be shipped out of the factory with a product qualification certificate. 5.2 The expander shall be subject to type inspection when it falls into one of the following situations: 2
JB/T9079.1—1999
) Trial production of new products or old products during conversion to current production: b1 After normal production, if there are major changes in structure, materials or processes, which may affect product performance; when the normal production time exceeds 13 years or the number of products is more than 50; when the product is discontinued for more than 1 year and then resumed; 2) When the results of sampling inspection or factory inspection are significantly different from those of the previous type inspection; when the national quality supervision agency issues the requirement for type inspection. Before type inspection, the product’s degree of exhaustion should be checked. The continuous operation time of type inspection should be no less than 50%, and the continuous operation time under the maximum free load (guaranteed fire pressure and gas pressure) should be no less than 4 days. The rest of the time should be carried out in accordance with normal operation records. During the test transmission process, the operation of all mechanisms should be checked: the exhaust salt, inlet and outlet temperature and pressure of the expander should be measured, and the grade rate calculation should be performed; the feasibility of the safety mechanism should be checked: the noise value should be measured; and the product should be disassembled for inspection after operation, and the seat volume of the easily removable parts should be measured and detailed correction records should be made: conclusions should be drawn on whether the product’s performance meets this standard. 5.3. For the batch production of expanders, the annual output shall be followed by sampling inspection according to the number specified in Table 3. The cleanliness shall be checked during sampling inspection. The continuous operation time shall not be less than 24h, of which the maximum operating temperature shall be less than 5h, and the rest shall be carried out under normal conditions. During the operation, the exhaust volume, inlet and exhaust pressure, inlet and exhaust temperature and speed of the expander shall be measured and the efficiency shall be calculated, and the reliability of the whole mechanism shall be checked. If there are unqualified ones, they shall be adjusted according to the efficiency screening of the number of units specified in Table 3. If there are still unqualified ones, they shall be inspected one by one. The inspection results shall comply with this standard and be verified after disassembly and inspection. The sampling inspection shall be evenly distributed throughout the year according to the production batch situation. Table 3 Batch sampling face test number
Annual production
Annual performance test number
>50-100
5,4 Each machine shall be subject to factory inspection by the manufacturer, and its continuous operation time shall not be less than 4h, of which it shall be able to operate continuously under maximum positive air pressure for not less than 3h. In addition to checking the assembly quality and the accuracy of the interaction between parts during operation, the inlet and exhaust pressure, inlet and exhaust temperature and speed of the bladder should also be checked to see if they are normal (no performance assessment is performed, and the safety mechanism is reliable). 6 Labeling, packaging and storage
6.1 Each expander shall be equipped with a label at a conspicuous position. The size and technical requirements of the label shall comply with the provisions of GB/T13306. The label shall at least indicate the following:
a) Product model and name;
b) Working medium:
e) Maximum intake pressure, MPa;
d) Exhaust pressure, MPaR
Maximum exhaust pressure, mh
f Speed, r/min;
g) Net weight, kg
h) Factory number;
0 Year and month of manufacture:
Manufacturer name.
JE/T 9079.1-1999
6.? Packaging of the expansion machine should be done after the paint is dry and should comply with the provisions of GB 13384. &.3 The oil seal is guaranteed to be effective within 1 year from the date of shipment from the manufacturer under normal transportation conditions. 6.4 The expansion machine and its spare parts and accessories should be stored in a flat place with a cover in the warehouse. During storage, anti-casting and anti-toxic inspections should be carried out regularly, and new seals should be added when necessary.
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