HG/T 2731-1995 Hot Alkali Pump Quality Classification Rules HG/T2731-1995 Standard Download Decompression Password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
HG/T2731-—95
Quality classification of hot alkali pumps
1995—0705 Issued
Ministry of Chemical Industry of the People's Republic of China
Precision network change.baonno.con1996—0301 Implementation
Chemical Industry Standard of the People's Republic of China
Quality classification of hot alkali pumps
Subject content and scope of application
This standard specifies the quality classification of single-stage and two-stage centrifugal hot alkali pumps. This standard is applicable to single-stage and two-stage centrifugal hot alkali pumps for petrochemical industry with a delivery temperature not exceeding 120℃. 2 Reference standards
GB32142
Determination method of flow plate of water pump
GB3215
General technical requirements for centrifugal pumps for refinery, chemical and petrochemical processesGB3216
GB10889
GB10890
Test methods for centrifugal pumps, mixed flow pumps, axial flow pumps and vortex pumpsMethods for measuring and evaluating vibration of pumps
Methods for measuring and evaluating noise of systems
GB/T13006
GB/T13007
GB/T13384
HG/T2388
JB3329
JB3330
JB4 297
Cavitation of centrifugal pumps, mixed flow pumps and axial flow pumpsEfficiency of centrifugal pumps
General technical conditions for packaging of electromechanical products
General rules for quality or classification of steel pressure vessels
Static balance standard for rotating parts of steam turbines
Dynamic balance standard for rigid rotors of steam turbines
Technical conditions for painting of pump products
JB/T6881
JB/T6882
Pump reliability determination test
Pump reliability verification test
JB/T6913
Pump product cleanliness
3 Grading principles
3.1 The quality classification method of hot alkali pumps shall comply with the provisions of Chapter 4 and Chapter 5 of HO/T2388. 3.2 Based on drawings and GB, 3215, classification and grading shall be carried out according to structural characteristics and quality characteristics of the manufacturing process. 4 Classification rules
4.1 The material part shall comply with the provisions of Table 1.
4.2 The machined part shall comply with the provisions of Table 2, 4.3 The assembly and accessories shall comply with the provisions of Table 3. 4.4 The performance test and acceptance part shall comply with the provisions of Table 4. 4.5 Paint, packaging and factory documents shall comply with the provisions of Table 5. Approved by the Ministry of Chemical Industry of the People's Republic of China on July 5, 1995. HG/T2731-85
Implementation on March 1, 1996
Quality characteristics
Main stud
Main nut
Bearing box
Quality certification characteristics
Impeller static balance
Rotor dynamic balance test
Shelling water pressure test
Main bolt
Main nut
Bearing box
Sealing surface quality inspector
Non-destructive inspection of parts
HG/T273195
Table" Materials
Quality certification characteristics
Quality characteristic indicators
(1) Materials (including substitutes) conform to drawings, GB3215(2) Re-inspect according to relevant material standards
(3) Materials and rough parts should have certificates or inspection reports Table 2 Machining
Quality certification characteristics
Quality disc characteristic indicators
Conform to drawings, GB3215 regulations
Comply with drawings, GB3215, JB3329 regulationsComply with drawings, GB3215 regulations
Comply with drawings, GB3215, B3330 regulations
Comply with drawings, GB3215 regulations
Standard investment network m.ba8080:cco. Various standards industry information science and technology first download level
Inspection method
Verify the actual object
and the certificate
Inspection method
Inspect the certificate
or Actual measurement
Quality characteristics
Clearance between impeller and pump body seal
Clearance between impeller and pump cover seal
Clearance between shaft sleeve and throttle ring
Impeller seal ring outer circle runout
Shaft sleeve outer circle runout
Main purchased accessories
Main self-made accessories
Cleanliness
Quality characteristics
Operation test
Bearing temperature
Lubricating oil leakage
Leakage of plate seal
HG/T 2731-—95
Table 3 Assembly and accessories
Quality characteristics
Quality benefit characteristics
Quality pending indicators
(1) Meet the requirements of Class B
(2) After the whole machine is assembled, it can
guarantee that the user can
Assembly (including small assembly of components, installation of pipelines, assembly of the whole machine, etc.) should comply with
drawings, GB3215 regulations
Comply with drawings, GB3215 regulations
Comply with drawings regulations
(I) Meet the requirements of Class B
(2) Have a purchase manual
Have a complete quality disk qualification certificate from the manufacturer
Have complete design, test data and qualification certificate Bearing oil chamber and lubrication The internal cleanliness of each component of the sliding system (such as oil tank, pipeline, etc.) shall comply with the provisions of JB/T6913 Table 4
Performance test and acceptance
Quality characteristic index
The operation of the pump shall comply with the requirements of the drawings and GB3215 and reach the B level requirements in GB10889
The pump unit shall comply with the B level requirements in GB10890
Comply with the drawings and GB3215
No leakage or mist spray is allowed When the specification is <50mm
When the specification is <50mm
When the specification is ≥50mm
≤3
≤3
When the specification is ≥50mm
(1)The parameters shall comply with the requirements of the drawings
and reach GB 10889
Class C regulations
The pump unit complies with
GB10890Class C regulations
When specification <50mm
When specification ≥50mm
(2)Should comply with GB3214, GB3216Class C regulationsStandards for transformer network W
Inspection method
Inspection certificate
Or actual measurement
Inspection certificate
Inspection certificate
Or actual measurement
Inspection method
Inspection certificate
Or actual measurement
Inspection certificate
Visual inspection
Inspection certificate
Or actual measurement
Quality characteristics
Cavitation residual
Embeddability
Quality characteristics
Paint, appearance
Protection of machined surface
Nameplate, logo
Factory technical documents
Quality characteristics
HG/T2731-95bZxz.net
Continued Table 1
Quality characteristics index
(1) The design point efficiency of single-stage double-suction pump is not lower than (1) The design point efficiency of single-stage double-suction pump is c design point efficiency, c is GB/T13007 level index plus 5%
(2) The design point efficiency of two-stage pump is C level
The design point efficiency is C level
The index plus 3%
Indicator plus 1.5%
The above efficiency difference is not
The above efficiency difference is not
Lower than the provisions of class bLower than the provisions of class c
Conform to the drawing or GB/T13006
When the order requires regularity measurement, it shall conform to the drawing and JB/T6881
Table 5 Paint, packaging and factory documents
Quality characteristics
5 Quality grade assessment of hot alkali pump
Quality characteristic indicators
Conform to the drawing, GB3215 and JB4297Conform to the drawing, GB3215 regulations
Conform to the drawing, G According to the requirements of B3215 and GB/T13384, the drawings shall be met, and the requirements of GB3215 and GB/T13386 shall be met, and the drawings shall be met, and the requirements of GB3215 shall be met
Inspection method
Inspection certificate
Or actual measurement
Check the certificate or verify according to
JB/T6882
Inspection method
Check the object
Inspection certificate
According to the quality inspection results of the hot alkali pump, fill in the inspection summary table according to Table B2 of HG/T2388, and compare the item rate in Table B2 with Table 3 of HG/T2388 to determine the quality level of the hot alkali pump. The content and format of the quality level assessment certificate of the hot alkali pump shall be in accordance with the provisions of Table B3 of HG/T2388, with additional instructions:
This standard is proposed by China National Chemical Equipment Corporation. This standard is under the jurisdiction of the Chemical Machinery and Equipment Standardization Technical Unit of the Ministry of Chemical Industry and the China Chemical Equipment Association. This standard was drafted by the Chemical Machinery Plant of Nanjing Chemical Industry (Group) Corporation. The main drafters of this standard are Ding Kun and Zhang Dongqin.
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