This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage requirements of pipeline centrifugal pumps. This standard is applicable to pipeline centrifugal pumps that transport clean water or weakly corrosive liquids at a temperature of 0~100℃. JB/T 6878.2-1993 Technical conditions for pipeline centrifugal pumps JB/T6878.2-1993 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Technical Conditions for Pipeline Centrifugal Pumps
1 Subject Content and Scope of Application
JB/T6878.2-93
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage requirements for pipeline centrifugal pumps. This standard applies to pipeline centrifugal pumps (hereinafter referred to as pumps) that transport clean water or weakly corrosive liquids at a temperature of 0 to 100°C. 2 Reference standards
GB/T1415
GB2828
GB3216
GB6556
GB7306
GB10889
GB10890
GB/T13306
JB4127
JB/T4297
Packaging, storage and transportation, pictorial marking
Metric taper thread
Batch inspection, counting sampling procedures and sampling tables (applicable to continuous batch inspection) Test methods for centrifugal pumps, mixed flow pumps, axial flow pumps and swirl pumps 10 bar grey cast iron pipe flange dimensions
Types, main dimensions, materials and identification of mechanical seals Pipe threads for threaded seals
Methods for measuring and evaluating vibration of pumps
Methods for measuring and evaluating noise of pumps
Technical conditions for mechanical seals
Technical conditions for painting of pump products
JB/T6880.1
Gray iron castings for pumps
JB/T6880.2Steel castings for pumps
JB/T6878.1Types and basic parameters of pipeline centrifugal pumps ZBK22007
3Technical requirements
3.1General requirements
Technical conditions for Y series (IP44) three-phase asynchronous motorsPumps shall comply with the requirements of this standard and be manufactured in accordance with drawings and technical documents approved by the prescribed procedures. 3.2PerformanceWww.bzxZ.net
3.2.1The performance parameters of the ticket shall comply with the provisions of JB/T6878.1. 3.2.2 The matching motor shall comply with the provisions of ZBK22007, and the fractional horsepower and special motors shall comply with the provisions of the corresponding standards. 3.3 Operation
3.3.1 When operating under rated conditions, the pump shall not have abnormal phenomena such as damage to parts and components. 3.3.2 When operating under rated conditions, the vibration of the pump shall comply with the provisions of GB10889. 3.3.3 When operating under rated conditions, the noise of the pump shall comply with the provisions of GB10890. 3.4 Design
3.4.1 When the inlet and outlet of the pump are flanged, they shall comply with the provisions of GB4216.4, and the pressure level shall be determined according to PN10. When threaded connection is used, it shall comply with the provisions of GB/T1415 or GB7306. Approved by the Ministry of Machinery Industry on July 13, 1993
Implemented on July 1, 1994
JB/T6878.2-93
3.4.2 Components that bear pressure should be subjected to water pressure test. The test pressure is 1.5 times the specified working pressure, and the pressure should be maintained for 5 minutes without leakage or other defects.
3.4.3 The pump and the motor should be coaxial or connected by an extended shaft or coupling. The shaft should have sufficient strength and rigidity to ensure reliable operation of the pump. 3.4.4 The impeller of the pump shall be subjected to static balance test, and the allowable unbalanced torque shall be calculated as follows: M=eGg
Wherein: M is the allowable unbalanced torque, N·m; - the allowable eccentricity (when the synchronous speed is 3000r/min, e=2×10-\m; when the synchronous speed is 1500r/min, e4×10-*m);
G——the mass of a single impeller, kg;
-gravitational acceleration 9.81m/s.
When the calculated allowable unbalanced mass at the maximum diameter of the impeller is less than 3g, it is allowed to be calculated as 3g provided that the measured vibration value meets the requirements of Article 3.3.2.
3.4.5The running clearance between the sealing ring and the impeller shall be selected according to Table 1. Table 1
Seal ring diameter
Diameter clearance
>75~110
>112~140
>140~180
>180~220
>220~280
3.4.6Mechanical seals shall comply with the provisions of GB6556 and JB4127. If other seal types are used, they shall meet the use requirements and comply with the provisions of the corresponding standards.
3.5Material
The materials of the main parts of the pump shall comply with the provisions of Table 2. The material of the corrosion-resistant pump shall be determined by negotiation between the supply and demand parties according to the different media. Table 2
Material brand
The quality of the pump casting shall comply with the provisions of JB/T6880.1 and JB/T6880.2. Cracks, pressure marks and other defects are not allowed on the shaft surface. Assembly and appearance quality
Parts can be assembled only after they have passed the inspection. Fasteners should be connected reliably without missing or loosening. The assembled ticket should rotate flexibly without blocking. The painting of the pump should comply with the provisions of JB/T4297. 3.7 Safety
The unit should have grounding measures for the motor.
There should be reliable waterproof measures between the pump and the motor to prevent water from entering the motor. 4 Test method
4.1 The performance test of the pump shall be carried out in accordance with the C-level provisions of GB3216. 4.2 The vibration measurement of the pump shall be carried out in accordance with the provisions of GB10889. 4.3. The noise measurement of the pump shall be carried out in accordance with the provisions of GB10890. 5 Inspection rules
The inspection of the pump is divided into factory inspection and type inspection. 5.1 Factory inspection
5.1.1 Inspection items In addition to the provisions of GB3216, the following items shall also be inspected: Pump
Appearance inspection;
Assembly quality inspection;
Inspection of safety measures.
JB/T 6878.2-93
Pumps produced in batches shall be inspected in accordance with the provisions of GB2828, and the sampling method and judgment rules shall be determined by negotiation between the supply and demand parties. 5.1.2
Type inspection
In addition to the provisions of GB3216, the following items shall also be inspected: Appearance inspection;
Assembly quality inspection;
Impeller static balance test;
Hydraulic pressure test;
Inspection of safety measures.
Type inspection shall be conducted in any of the following cases: trial production and finalization of new products or old products; after formal production, if there are major changes in structure, materials, and processes that may affect product performance; in batch production, periodic inspection is conducted to understand the stability of product quality; when the product is resumed after a long period of suspension;
when the factory inspection results are significantly different from the last type inspection. The number of units for type inspection shall not be less than 2.
Each product shall be inspected and qualified by the inspection department and accompanied by a product certificate before it can be shipped. 5.3
6 Marking, packaging, transportation and storage
6.1 Marking
6.1.1 Product label
The label shall comply with the relevant provisions of GB/T13306 and be fixed in an appropriate position. 6.1.1.1
The content of the label shall be as follows:
Product name and model;
Specified flow, m/h,
Specified head, m;
Matching motor power, kW;
Speed, r/min;
NPSH, m;
Manufacturer name;
Factory number and date;
Unit weight, kg
Overall dimensions, mm.
The pump (unit) shall have an obvious direction mark. Packaging mark
The words and marks on the packaging box should be neat and clear, and the contents are as follows: the name of the shipping station and the manufacturer;
the name of the receiving station and the receiving unit;
the product name and model;
the overall dimensions, mm;
the gross weight, kg;
necessary words and diagrams should be marked on the appropriate parts of the packaging box, which should comply with the provisions of GB191. 6.2
Packaging and transportation
JB/T 6878.2-93
The packaging of the pump should ensure that it will not be damaged due to improper packaging under normal transportation conditions. There should be waterproof measures in the packaging, and the exposed machined surface of the product should be coated with anti-rust grease before packaging. The following random documents and accessories should be attached to the packaging: packing list;
product certificate;
instruction manual;
necessary random accessories.
6.3 Storage
6.3.1 Pumps that pass the inspection should be placed in a dry and well-ventilated warehouse. 6.3.2 If the product is stored for more than 12 months, it must be checked and repackaged. Guarantee matters
When the user complies with this standard and uses the product according to the instructions, if the product is damaged or cannot work properly due to the quality within 12 months from the date of delivery by the manufacturer, the manufacturer shall be responsible for repairing or replacing parts (except wearing parts). Additional remarks:
This standard was proposed and managed by Shenyang Pump Research Institute. This standard was drafted by Jiangsu Institute of Technology Fluid Machinery Research Institute. The main drafters of this standard are Xie Darong, Wang Yang, and Sha Yi.
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