Some standard content:
Machinery Industry Standard of the People's Republic of China
Hot Water Centrifugal Pump
1 Subject Content and Scope of Application
Technical Conditions
JB/T 5414—91
This The standard stipulates the technical requirements, test methods and inspection rules for single-stage single-suction hot water centrifugal pumps (hereinafter referred to as "pumps"). This standard applies to pumps that deliver hot water with a temperature not higher than 150°C. The maximum working pressure of the pump is not greater than 1.6MPa, and the suction pressure is not greater than 0.8MPa. bZxz.net
2 cited standards
Deep groove ball bearing dimensions
GB 276
GB6991
Technical conditions for high-quality carbon structural steel
GB1220 | |tt | Test methods for pumps and vortex pumps GB4216.516 Bar gray cast iron pipe flange dimensions GB 5661
GB5662
GB 6556
GB 7306
GB 9439
Cavity dimensions for axial suction centrifugal pump mechanical seals and soft packing Axial suction centrifugal pump (16 bar) Marking, performance and dimensions Mechanical seal types, main dimensions, materials and identification marks Pipe threads for thread seals ||tt ||Gray iron castings
GB10889
GB 10890
Pump vibration measurement and evaluation method
Pump noise measurement and evaluation method
GB/T 13007
Centrifugal pump efficiency
Cavitation margin of centrifugal pumps, mixed flow pumps and axial flow pumps GB/T 13006
JB8 product label
JB2759
JB4297 | |tt | Production of drawings and technical documents. If users have different requirements for products than this standard, they can follow the provisions of the technical agreement. 3.1 Product performance
3.1.1 The performance parameters of the pump should comply with GB5662 or contract regulations, and the performance deviation should comply with the C-level regulations in GB3216. 3.1.2 The manufacturer should determine the allowable working range of the product and draw the performance curve (the relationship curve between head, efficiency, shaft power, necessary NPSH and flow rate).
3.1.3 The efficiency of the pump should not be lower than the requirements of GB/T13007. 3.1.4 The NPSH of the pump should not be greater than the requirements of GB/T13006. The Ministry of Mechanical and Electronic Industry of the People's Republic of China approved the implementation on 1992-07-01 on July 22 | During operation, the measured vibration limit value should comply with the regulations of GB10889. 3.1.6 When the pump operates within the allowable working range, the measured noise limit value should comply with the regulations of GB10890. 3.2 Structural design
3.2.1 Prime mover
Select the prime mover power as shown below. | |tt | tt||100
0.2
3.2.2 Critical speed
0.5
5
10
The critical speed of the pump should be at least 10% higher than the maximum allowable continuous operating speed. 3.2.3 Balance
50
Pump shaft power, kw
100
500
Pump rotation. Parts and components should be balanced. Using the G6.3 level in Appendix A (Supplement) can usually guarantee the vibration requirements of 3.1.5
3.2.4 Parts under pressure
3.2. 4.1 The pressure-bearing shell, shaft seal, seal gland, etc. should be able to withstand the specified working pressure and hydraulic test pressure. The hydraulic pressure test of the pressure-bearing parts should be 1.5 times the working pressure, and there should be no leakage. 3.2. 4.2 The suction port and discharge port flanges of the pump should comply with the requirements of GB4216.5. 3.2.4.3 The pump body should be provided with drain holes, water filling holes and pressure measuring holes of the suction and discharge port flanges. GB7306 regulations.
3.2.5 Impeller
3.2.5.1 The impeller is designed to be closed. 3.2.6 Sealing ring
The sealing ring should be reliably fixed on the pump body and pump cover. The mechanical properties of the sealing ring material should not be higher than that of the impeller. The diameter gap between the sealing ring and the impeller should be 1. The requirements of Table 1
Table 1
Nominal diameter of sealing ring
Gap
75
0.25
>75～110|| tt||0.30
>110~~140
0.35
>140~180
0. 40
>180~~220||tt ||0. 45
mm
>220~280
0.50
3.2.7 Shaft and bushing
3.2.7.1 The shaft should be sufficient When calculating the deformation of the shaft, the supporting effect of the packing should not be considered. The deflection of the shaft at the stuffing box due to radial load should not exceed 0.05mm
3.2.7.2 The direction of the thread on the shaft, The nut should be in a tightened state when the shaft rotates. The center hole of the shaft should be retained. 610
JB/T 5414-91
3.2.7.3 The shaft extension size should comply with the requirements of GB5662. The sleeve should be wear-resistant and reliably fixed on the shaft. 3.2.7.5 The sleeve and the shaft should be sealed to prevent leakage between the shaft and the sleeve. 3.2.8 The bearing should be extended beyond the sealing gland.
3.2.8.1 Bearings should comply with the regulations of GB276. 3.2.8.2 The bearing temperature shall not be higher than the ambient temperature by 40℃, and the maximum shall not be higher than 80℃. 3.2.8.3 All holes or gaps in the bearing body that communicate with the outside should be able to prevent dirt from entering and lubricating oil from leaking under normal operating conditions.
3.2.8.4, the bearings should be lubricated with thin oil or dry oil. When lubricated with thin oil, a vent plug should be installed on the upper part of the bearing body and an oil drain pipe plug should be installed on the lower part. 3.2.9 Shaft seal
3.2.9.1 The shaft seal of the pump adopts soft packing seal or mechanical seal. 3.2.9.2 The size of the shaft seal cavity should comply with the regulations of GB5661. 3.2.9.3 The mechanical seal should comply with the requirements of GB6556. 3.2.9.4 When soft packing is used, sufficient space should be left outside the stuffing box to facilitate the installation and removal of the packing. 3.2.9.5 The shaft seal cavity should be provided with a hole that can be filled with coolant or sealing liquid, and a cooling cavity should be provided outside the shaft seal cavity. 3.2.10 Coupling
3.2.10.1 The coupling should be able to transmit the maximum torque of the belt power, and the coupling speed should be adapted to the belt power speed. 3.2.10.2 The coupling guard should cover all rotating parts of the coupling. 3.2.11 Base
The base should be able to withstand the force and moment generated by the pipeline without causing the coaxiality of the two half couplings of the pump and the prime mover to exceed the specified value. There should be a sufficient number of grouting holes with a diameter of not less than 100mm on the base. 3.3 Materials of main parts
3.3.1 The materials of main parts of the pump should not be less than those specified in Table 2. If the user has special requirements, it shall be stipulated in the technical agreement. Table 2
Part name
Pump body, pump cover, impeller, sealing ring, bearing body shaft
Shaft sleeve
Material grade
HT200|| tt||45
HT250 or 2Cr13
3.3.2 Materials must have certificates of conformity or factory inspection data to prove compliance with relevant standards. 3.4 Manufacturing
3.4.1 Castings
3.4.1.1 Pump castings should be free of casting defects such as looseness, shrinkage holes, and cracks that affect strength. Standard code
GB9439
GB699
GB9439
GB1220
3.4.1.2 The surface of the casting should be cleaned and separated by sand blasting, shot blasting, etc. Surface flash and pouring risers should be cut off to make them flush with the surface of the casting.
3.4.1.3 Under the condition that the performance is not affected, welding repair is allowed for castings. After welding repair, the pressure-bearing parts shall be subjected to water pressure test in accordance with the provisions of Article 3.2.4.1.
3.4.1.4 The dimensional deviation and roughness of the flow-through parts of the castings shall comply with the provisions of the relevant standards. 3.4.2 Assembly
3.4.2.1 The parts of the pump must be inspected and cleaned before assembly. 3.4.2.2 The matching parts and components shall be interchangeable. 3.4.2.3 After the pump is assembled, the rotating rotor shall be adjusted evenly. 3.4.2.4 The rotor parts shall be checked for circular runout, and the tolerance shall be in accordance with the provisions of Table 3. 611
Part
Basic size
Impeller sealing ring outer circle
Shaft sleeve outer circle
3.4.3 Anti-rust treatment and painting
50
0.05
0.04
JB/T5414—-91
Table 3
>50～120
0.07
0.06
>120～260
0.08
0. 07
>260
0. 09
0.08
mm
3.4.3.1 When assembling the pump, the machined surfaces of the parts should be coated with lubricating oil or grease. The inner surface of the oil storage chamber of the bearing body should be cleaned and painted with resistant paint. The exposed surface of the pump should be coated with anti-rust grease. 3.4.3.2 The surface treatment and coating technology requirements of the paint shall comply with the provisions of JB4297. 3.4.3.3 After the pump passes the performance test, the accumulated water in the pump should be removed and the anti-rust treatment should be carried out again. 4 Test methods
4.1 The chemical composition analysis method and mechanical performance test method of the material shall comply with the provisions of the relevant standards in Article 3.3.1. 4.2 The parts under pressure shall be subjected to water pressure test in accordance with the provisions of Article 3.2.4.1. The test medium shall be clean water at room temperature and the pressure holding time shall be not less than 5 minutes.
4.3 The performance test method of the pump shall comply with the provisions of GB3216. 4.4 The vibration measurement method of the pump shall comply with the provisions of GB10889. 4.5 The noise measurement method of the pump shall comply with the provisions of GB10890. 5 Inspection rules
The inspection of the pump is divided into type test and export inspection. 5.1 Type test
5.1.1 Type test should be conducted in one of the following situations: new products or old products transferred to the factory for trial production and identification; a.
After formal production, if there are major changes in structure, materials, and processes that may affect product performance; b.
When periodic inspection is conducted for mass-produced products; c.
d. When the product is resumed after a long period of suspension; when the factory inspection results are significantly different from the last type test. e.
5.1.2 The inspection items should be in accordance with the provisions of GB3216, and vibration and noise inspections should be conducted at the same time. 5.1.3 The number of units to be inspected should be no less than 2.
5.2 Factory inspection
5.2.1 Products produced in mass production should be inspected at the factory. 5.2.2 The inspection items should be in accordance with the provisions of GB3216. 5.2.3 The number of units to be inspected and the sampling rules should be in accordance with the provisions of GB2828. The sampling method can be one or two samplings, and the inspection level is I. The qualified quality level AQL is 4.
5.3 Final inspection
Each pump must be finally inspected by the quality inspection department of the manufacturer according to the order form, and the scope of supply of the complete set should be correct. The packing documents should be complete, and the product can only be shipped after the product quality certificate is issued. 6 Warranty period
If the user selects the product appropriately and abides by the storage and use rules, within 18 months from the date of shipment from the manufacturer, the continuous operation shall not exceed 12 months. If the product is damaged or cannot work normally due to poor manufacturing quality, the manufacturer shall repair or replace the product 612
or parts (excluding wearing parts) for the user free of charge.
7 Marking, packaging, transportation and storage
7.1 Marking
JB/T 5414—91
The nameplate of the pump should be corrosion-resistant, with clear handwriting and firmly fixed on the pump. The nameplate content should include: Manufacturer name:
a.
b. Pump model and name;
Main parameters of the pump: flow, m/h; head, m; speed, r/min; power, kW; required NPSH, m, pump weight c.
kg;
d. Pump manufacturing number and manufacturing date.
The nameplate size and technical requirements should comply with the provisions of JB8. The direction of rotation of the pump should be indicated by an arrow in a conspicuous position. 7.2 Packaging and transportation
7.2.1 The packaging of the product should comply with the provisions of JB2759. 7.2.2 Measures should be taken to avoid damage to the pump due to vibration and collision during transportation. 7.2.3 The inlet and outlet of the pump should be blocked to prevent debris from falling into people. 7.2.4 Each pump should be accompanied by the following documents when leaving the factory: Product certificate:
a.
b. Product packing list;
c.
Instruction manual.
7.3 Storage
The pump should be protected from rust and damage during storage; the oil seal of the pump is valid for 12 months and should be inspected and re-sealed after the expiration. 8 Complete set scope
The manufacturer should provide all or part of the following complete set supply scope according to the needs of the user and indicate it in the order form: a. Pump;
b. Motor;
Base and anchor bolts;
c.
Consumable parts and special tools;
d.
e.
Coupling and guard.
613
Er
“
Additional instructions:
5 000
2
1000
5
4
2
100
A
10
1
2
0. 1
305
100
JB/T5414--91
Appendix A
Allowable eccentricity
(supplement)
345
1000
345
10000
Speed ??n, r/ min
This standard is proposed and managed by Shenyang Pump Research Institute of the Ministry of Machinery and Electronics Industry. This standard is drafted by Shenyang Pump Research Institute of the Ministry of Machinery and Electronics Industry. The main drafter of this standard is Zhou Shao.
614
45
100 000
1 Type test
5.1.1 Type test should be carried out in one of the following situations: new products or old products should be transferred to the factory for trial production and identification; a.
After formal production, such as structure, material, process When there are major changes that may affect product performance: b.
During periodic inspection of mass-produced products; c.
d. When the product resumes production after a long-term suspension; when the factory inspection results are significantly different from the last type test. e.
5.1.2 Inspection items should be in accordance with the provisions of GB3216, and vibration and noise inspection should be done at the same time. 5.1.3 The number of inspection units should be no less than 2.
5.2 Factory Inspection
5.2.1 Products produced in batches should undergo factory inspection. 5.2.2 Inspection items should be in accordance with the provisions of GB3216. 5.2.3 The number of inspection units and sampling rules should be in accordance with GB2828. The sampling method can be primary or secondary sampling, using inspection level I. The qualified quality level AQL is 4.
5.3 Final inspection
Each pump must be final inspected by the manufacturer's quality inspection department according to the order order, and the complete set of supply scope should be correct. Packing documents should be complete, and product quality certificates can only be issued before leaving the factory. 6 Guarantee period
Provided that the user selects the product appropriately and abides by the rules of storage and use, within 18 months from the date of shipment from the manufacturer, and the continuous operation does not exceed 12 months, the product may be damaged due to poor manufacturing quality. When damaged or unable to work properly, the manufacturer shall repair or replace the product or parts (excluding wearing parts) free of charge for the user.
7 mark, packaging, transportation and storage
7.1 mark
JB/T 5414—91
The nameplate of the pump should be corrosion-resistant, clearly written, and firmly fixed on the pump. The nameplate content should include: Manufacturer name:
a.
b. Pump model and name;
Main parameters of the pump: flow rate, m/h; lift, m; rotation speed, r/min; equipped power, kW; required NPSH, m, pump weight c.
kg;
d. Pump manufacturing number and date of manufacture.
The size and technical requirements of the nameplate should comply with the regulations of JB8. The direction of rotation of the pump should be clearly indicated by an arrow. 7.2 Packaging and transportation
7.2.1 The packaging of the product should be in accordance with the regulations of JB2759. 7.2.2 Measures should be taken to avoid damage to the pump due to vibration and collision during transportation. 7.2.3 The inlet and outlet of the pump should be blocked to prevent debris from falling onto people. 7.2.4 Each pump should be accompanied by the following documents when leaving the factory: Product Certificate:
a.
b. Product packing list;
c.
Instruction Manual.
7.3 Storage
The pump should be prevented from being rusted and damaged during storage; the oil seal of the pump is valid for 12 months, and should be inspected and re-sealed upon expiration. 8 Complete set scope
Manufacturing Co., Ltd. shall provide all or part of the following complete set supply scope according to user needs, and indicate it in the order form: a. Pump;
b. Motor;
Base and anchor bolts;
c.
Consumable parts and special tools;
d.
e.||tt| |Couplings and Guards.
613
Er
"
Additional notes:
5 000
2
1000
5
4
2
100
A
10
1
2
0. 1
305
100
JB/T5414--91
Appendix A
Allowable eccentricity
(supplement)|| tt | | 345 | | tt | | 1000 | This standard is drafted by the Shenyang Water Pump Research Institute of the Ministry of Mechanical and Electronic Industry. The main drafter of this standard is: Zhou Shao
614
45
100 000||tt| |1 Type test
5.1.1 Type test should be carried out in one of the following situations: new products or old products should be transferred to the factory for trial production and identification; a.
After formal production, such as structure, material, process When there are major changes that may affect product performance: b.
During periodic inspection of mass-produced products; c.
d. When the product resumes production after a long-term suspension; when the factory inspection results are significantly different from the last type test. e.
5.1.2 Inspection items should be in accordance with the provisions of GB3216, and vibration and noise inspection should be done at the same time. 5.1.3 The number of inspection units should be no less than 2.
5.2 Factory inspection
5.2.1 Products produced in batches should undergo factory inspection. 5.2.2 Inspection items should be in accordance with the provisions of GB3216. 5.2.3 The number of inspection units and sampling rules should be in accordance with GB2828. The sampling method can be primary or secondary sampling, using inspection level I. The qualified quality level AQL is 4.
5.3 Final inspection
Each pump must be final inspected by the manufacturer's quality inspection department according to the order order, and the complete set of supply scope should be correct. Packing documents should be complete, and product quality certificates can only be issued before leaving the factory. 6 Guarantee period
Provided that the user selects the product appropriately and abides by the rules of storage and use, within 18 months from the date of shipment from the manufacturer, and the continuous operation does not exceed 12 months, the product may be damaged due to poor manufacturing quality. When damaged or unable to work properly, the manufacturer shall repair or replace the product or parts (excluding wearing parts) free of charge for the user.
7 mark, packaging, transportation and storage
7.1 mark
JB/T 5414—91
The nameplate of the pump should be corrosion-resistant, clearly written, and firmly fixed on the pump. The nameplate content should include: Manufacturer name:
a.
b. Pump model and name;
Main parameters of the pump: flow rate, m/h; lift, m; rotation speed, r/min; equipped power, kW; required NPSH, m, pump weight c.
kg;
d. Pump manufacturing number and date of manufacture.
The size and technical requirements of the nameplate should comply with the regulations of JB8. The direction of rotation of the pump should be clearly indicated by an arrow. 7.2 Packaging and transportation
7.2.1 The packaging of the product should be in accordance with the regulations of JB2759. 7.2.2 Measures should be taken to avoid damage to the pump due to vibration and collision during transportation. 7.2.3 The inlet and outlet of the pump should be blocked to prevent debris from falling onto people. 7.2.4 Each pump should be accompanied by the following documents when leaving the factory: Product Certificate:
a.
b. Product packing list;
c.
Instruction Manual.
7.3 Storage
The pump should be prevented from being rusted and damaged during storage; the oil seal of the pump is valid for 12 months, and should be inspected and re-sealed upon expiration. 8 Complete set scope
Manufacturing Co., Ltd. shall provide all or part of the following complete set supply scope according to user needs, and indicate it in the order form: a. Pump;
b. Motor;
Base and anchor bolts;
c.
Consumable parts and special tools;
d.
e.||tt| |Couplings and Guards.
613
Er
"
Additional notes:
5 000
2
1000
5
4
2
100
A
10
1
2
0. 1
305
100
JB/T5414--91
Appendix A
Allowable eccentricity
(supplement)|| tt | | 345 | | tt | | 1000 | This standard is drafted by the Shenyang Water Pump Research Institute of the Ministry of Mechanical and Electronic Industry. The main drafter of this standard is: Zhou Shao
614
45
100 000||tt| |
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