GB 50275-1998 Code for construction and acceptance of compressor, fan and pump installation projects
Some standard content:
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
GB50275—98
Code for construction and acceptance of compressor, fan and pumpinstallation engineering
Published on 1998—08—27
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering Construction Standard Full-text Information System
Implemented on 1998—12—01
Jointly Issued
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Compressor, fan, pump installation engineering
Construction and acceptance code
Code for construction and acceptance of compressor,fan and pump installation engineeringGB50275-98
Editor department: Former Ministry of Machinery Industry of the People's Republic of ChinaApproval department: Ministry of Construction of the People's Republic of ChinaEffective date: December 1, 1998
Engineering construction standard full text information system
Engineering construction standard full text information system
Notice on the release of ten national standards including "General Specification for Construction and Acceptance of Mechanical Equipment Installation Engineering" Jianbiao [1998] No. 9
According to the requirements of the State Planning Commission's Document No. Jizong [1986] 2630 and Document No. Jizong [1987] 2390, the ten standards including "General Specification for Construction and Acceptance of Mechanical Equipment Installation Engineering" jointly revised by the former Ministry of Machinery Industry and relevant departments have been reviewed by relevant departments. The following standards are now approved as mandatory national standards and will be implemented from December 1, 1998. The former national standards "Specification for Construction and Acceptance of Mechanical Equipment Installation Engineering TJ231" and "Specification for Construction and Acceptance of Refrigeration Equipment Installation Engineering" GBJ66-84 are abolished at the same time. "General Specification for Construction and Acceptance of Mechanical Equipment Installation Projects" GB50231-98 "Specifications for Construction and Acceptance of Continuous Conveying Equipment Installation Projects" GB5027098 "Specifications for Construction and Acceptance of Metal Cutting Machine Tool Installation Projects" GB50271-98 "Specifications for Construction and Acceptance of Forging Equipment Installation Projects" GB50272-98 "Specifications for Construction and Acceptance of Industrial Boiler Installation Projects" GB50273-98 "Specifications for Construction and Acceptance of Refrigeration Equipment and Air Separation Equipment Installation Projects" GB50274-98 "Specifications for Construction and Acceptance of Compressor, Fan and Pump Installation Projects" GB50275-98 "Specifications for Construction and Acceptance of Crushing and Grinding Equipment Installation Projects" GB50276-98 "Specifications for Construction and Acceptance of Casting Equipment Installation Projects" GB50277-98 "Specifications for Construction and Acceptance of Lifting Equipment Installation Projects" GB50278-98 The above specifications are managed by the State Machinery Industry Bureau, and the specific interpretation and other work are undertaken by the Installation Engineering Standard and Quota Station of the Ministry of Machinery Industry, and the publication and distribution are organized by the Standard and Quota Research Institute of the Ministry of Construction.
Ministry of Construction of the People's Republic of China
August 27, 1998
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Revision Notes
This specification is edited by the former Ministry of Machinery Industry in accordance with the requirements of the State Planning Commission's Document No. 1986450. The specific work of the revision was organized by the Installation Engineering Standard and Quota Station of the Ministry of Machinery Industry, and completed jointly with the Ministry's Hefei General Machinery Research Institute, Shaanxi Blower Factory, Shenyang Blower Factory, Shenyang Pump Research Institute and China Machinery Industry Fourth Installation Engineering Company.
During the revision process, the revision group carefully summarized the experience of implementing the original specifications on the construction and acceptance of compressor, fan and pump installation projects, fully investigated and understood the standardization and scientific research achievements of my country's compressor, fan and pump equipment manufacturing industry, absorbed new technologies, new materials and new processes in compressor, fan and pump installation projects, strictly followed the procedures, steps and requirements of the Ministry of Construction for revising standards and specifications, and finally our department reviewed and finalized it together with relevant departments.
This specification consists of five chapters and four appendices. The main contents of the revision are: 1. Axial flow blowers and axial flow compressors have been added. The centrifugal fans have been expanded from small and medium-sized to high-speed large units. The pumps have also been expanded from small integral units to large units disassembled and shipped from the factory, and from normal temperature pumps to high-temperature and low-temperature pumps. Vertical axial flow pumps, guide vane mixed flow pumps, submersible pumps, metering pumps and steam reciprocating pumps have been added, expanding the scope of application of this specification; 2. According to the equivalent manufacturing standards of international advanced technologies recently formulated by the compressor, fan and pump manufacturing industry, the corresponding installation engineering construction and acceptance specifications have been revised: 3. The contents of pump accessory equipment installation, pipeline pressure testing and trial operation have been enriched, and effective construction methods and construction processes have been adopted, such as the inspection and adjustment of the contact traces and contact spots of gear pairs, and the vibration evaluation methods of fans and pumps, and backward construction methods and processes have been eliminated;
4. The measurement units, nouns, terms, etc. have been greatly revised in accordance with the current national standards and the industry standards of compressors, fans and pumps. Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
During the implementation of this specification, if any modification or supplement is found, please send your opinions and relevant information to the "Compressor, Fan and Pump Installation Engineering Construction and Acceptance Specification" Management Group of the Installation Engineering Standard and Quota Station of the Ministry of Machinery Industry (address: No. 277 Wangfujing Street, Beijing, Postal Code: 100740) for reference in future revisions. Former Ministry of Machinery Industry
August 1998
Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Chapter 1
Chapter 2
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Chapter 3
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Chapter 4||tt ||Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Section 8
Compressors
Compressors shipped as a whole
Reciprocating piston compressors shipped in disassembly
Accessory equipment
Trial operation
Lubricated compressors
Screw compressors
General provisions?
Centrifugal fans
Axial flow fans.
Roots and Ye's blowers…||t t||Centrifugal blowers and centrifugal compressors
Axial flow blowers and axial flow compressors
General provisions
Centrifugal pumps…
Combined pumps
Vertical axial flow pumps and guide vane mixed flow pumps
Motorized reciprocating pumps·
Steam reciprocating pumps·
Metering pumps:
Screw pumps
Section 9
Water ring vacuum pumps
Engineering construction standards full text information system
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Engineering construction Standard Full Text Information System
Chapter 5
Appendix 1
Appendix 2
Appendix 3
Project Acceptance
Methods for measuring vibration velocity of fans and pumps
Configuration requirements for suction and discharge pipes of pumps Explanation of terms used in this specification
Additional explanation
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 1
Article 1.0.1 This specification is formulated to ensure the installation quality and safe operation of compressors, fans and pumps and promote the advancement of installation technology. This specification applies to the installation and acceptance of compressors, fans and pumps. Article 1.0.2
Article 1.0.3 The installation of compressors, fans and pumps shall be carried out according to the design. Article 1.0.4 Compressors, fans, and pumps not included in this specification or with special requirements shall be implemented in accordance with the design and equipment technical documents. Article 1.0.5 In addition to being implemented in accordance with this specification, the construction and acceptance of compressor, fan, and pump installation projects shall also comply with the provisions of current relevant national standards and specifications. Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Chapter 2 Compressors
Article 2.0.Article 1 This chapter applies to the installation of positive displacement reciprocating piston, screw, vane and diaphragm compressors.
Section 1 Compressors shipped as a whole
Article 2.1.1 When installing a compressor, the cleaning and inspection of the equipment shall meet the following requirements:
1. For reciprocating piston compressors, the piston, connecting rod, air valve and packing shall be cleaned and inspected, and the air valve and packing shall not be cleaned with steam; 2. For diaphragm compressors, the cylinder head, diaphragm, suction valve and exhaust valve shall be disassembled and cleaned, and there shall be no damage or rust.
Article 2.1.2 The horizontal deviation of the installation of the compressor shall not be greater than 0.20/1000, and shall be measured at the following locations:
1. For horizontal compressors and symmetrical balanced compressors, the measurement shall be made on the slideway surface or other reference surface of the fuselage;
2. For vertical compressors, the cylinder head shall be removed and the measurement shall be made on the cylinder top plane; 3. For other types of compressors, the measurement shall be made on the exposed part of the main shaft or other reference surface.
Section 2 Disassembly of factory-exited reciprocating piston compressors Article 2.2.1 Before assembling the compressor, the cleaning and inspection of the equipment shall meet the following requirements:
1. Parts, components and accessories shall be free of defects such as damage and rust; 2. Parts, components and accessories shall be cleaned, and the cleaning agent and water shall be removed after cleaning, and a layer of lubricating oil shall be applied to the processed surface. Non-lubricated compressors and their parts and components in contact with the medium of the Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
shall not be oiled, and the air valves, packings and other seals shall not be cleaned with steam.
Article 2.2.2 Before assembling the compressor, the original assembly marks of parts and components should be checked. The following parts and components should be assembled according to the marks: 1. The fuselage bearing seat, bearing cover and bearing shell; 2. The fuselage, middle body, connecting rod, crosshead, middle sleeve, cylinder and piston in the same row.
3. The fuselage and the supporting frame in the corresponding position; 4. The stuffing box and sealing box should be assembled according to the level and sequence. Article 2.2.3 The following requirements shall be met when assembling the fuselage and the middle body: 1. Inject kerosene into the fuselage to raise the lubricating oil to the highest oil level, the duration shall not be less than 4 hours, and there shall be no leakage; 2. The longitudinal and transverse horizontal deviation of the fuselage installation shall not be greater than 0.05/1000, and the measurement position shall meet the following requirements:
1. The transverse installation level of horizontal compressors and symmetrical balanced compressors shall be measured at the bearing hole of the fuselage, and the longitudinal installation level shall be measured at the front and rear points of the slideway (Figure 2.2.3);
Figure 2.2.3 Measuring the longitudinal and transverse installation level of the fuselage 1-bearing hole; 2-level meter; 3-slideway Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
2. Vertical compressors shall be measured on the fuselage joint surface, 3. L-type compressors shall be measured on the fuselage flange surface. 3. The coaxiality of the main bearing hole axis of the two fuselage compressors shall not be greater than g0.05mm.
Article 2.2.4 The following requirements shall be met when assembling the crankshaft and bearings: The oil passages of the crankshaft and bearings shall be clean and unobstructed, and the crankshaft oil plug and the locking device of the balance block shall be tightened;
, the steel shell of the bearing and the alloy layer of the bearing shall be firmly bonded, and there shall be no shelling or mute phenomenon;
3. The back of the bearing and the bearing seat shall fit tightly, and the contact surface area shall not be less than 70%
Figure 2.2.4-1 Measuring the verticality of the crankshaft axis to the slideway axis 1-crankpin axis: 2-crankshaft axis; 3-shaft body; 4-measuring bracket, 5-fuselage slideway axis; 6-wire bracket; 7-tensioning weight Engineering 4 Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
4. The radial and axial clearances between the bearing and the main journal shall comply with the provisions of the equipment technical documents;bZxz.net
5. The contact arc angle between the lower bearing of the split thick-walled bearing and the journal shall not be less than 90°, and the contact surface area shall not be less than 70% of the contact arc area; the contact surface area between the lower bearing and the side bearing of the four-open bearing and the journal shall not be less than 70% of the area of each bearing; 6. The bearing back and the bearing seat of the thin-walled bearing shall fit tightly; when the outer diameter of the bearing is less than or equal to 200mm, the contact surface area shall not be less than 85% of the bearing back area; when the outer diameter of the bearing is greater than 200mm, the contact area shall not be less than 70% of the bearing back area, and the contact shall be uniform; the assembly clearance of the thin-walled bearing shall comply with the provisions of the equipment technical documents; the alloy layer on the bearing surface should not be scraped. When scraping is required, the inner surface of the bearing seat should be scraped;
7. The horizontal deviation of the crankshaft installation should not be greater than 0.10/1000. And the measurement should be carried out on the main journal with a level at every 90° rotation of the crankshaft; 8. The verticality deviation of the crankshaft axis to the slideway axis should not be greater than 0.10/1000 (Figure 2.2.4-1);
9. Check the distance between the four positions of each crank (Figure 2.2.4-2), and the allowable deviation should comply with the provisions of the equipment technical documents; when there is no provision, the deviation should not be greater than 0.10/1000 of the stroke;
Figure 2.2.4-2 Measuring the distance between cranks
1-main journal, 2-crankshaft, 3-dial indicator 10. After the crankshaft is assembled, turn it for a few turns, and there should be no blocking phenomenon. Engineering Construction Standard Full Text Information System4-1 Measure the verticality of the crankshaft axis to the slideway axis 1-crankpin axis: 2-crankshaft axis; 3-shaft body; 4-measuring bracket, 5-fuselage slideway axis; 6-wire support; 7-tensioning hammer Engineering 4 Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
4. The radial and axial clearances between the bearing and the main journal shall comply with the provisions of the equipment technical documents;
5. The contact arc angle between the lower bearing of the split thick-walled bearing and the journal shall not be less than 90°, and the contact surface area It should not be less than 70% of the contact arc area; the contact surface area between the lower and side bearings of the four-open bearing and the journal should not be less than 70% of the area of each bearing; Sixth, the back of the thin-walled bearing should fit tightly with the bearing seat; when the outer diameter of the bearing is less than or equal to 200mm, its contact surface area should not be less than 85% of the back area of the bearing; when the outer diameter of the bearing is greater than 200mm, its contact area should not be less than 70% of the back area of the bearing, and the contact should be uniform; the assembly clearance of the thin-walled bearing should comply with the provisions of the equipment technical documents; the alloy layer on the bearing surface should not be scraped. When scraping is required, the inner surface of the bearing seat should be scraped;
Seventh, the horizontal deviation of the crankshaft installation should not be greater than 0.10/1000. And the measurement should be carried out on the main journal with a level at every 90° rotation of the crankshaft; 8. The verticality deviation of the crankshaft axis to the slideway axis should not be greater than 0.10/1000 (Figure 2.2.4-1);
9. Check the distance between the four positions of each crank (Figure 2.2.4-2), and the allowable deviation should comply with the provisions of the equipment technical documents; when there is no provision, the deviation should not be greater than 0.10/1000 of the stroke;
Figure 2.2.4-2 Measuring the distance between cranks
1-main journal, 2-crankshaft, 3-dial indicator 10. After the crankshaft is assembled, turn it for a few turns, and there should be no blocking phenomenon. Engineering Construction Standard Full Text Information System4-1 Measure the verticality of the crankshaft axis to the slideway axis 1-crankpin axis: 2-crankshaft axis; 3-shaft body; 4-measuring bracket, 5-fuselage slideway axis; 6-wire support; 7-tensioning hammer Engineering 4 Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
4. The radial and axial clearances between the bearing and the main journal shall comply with the provisions of the equipment technical documents;
5. The contact arc angle between the lower bearing of the split thick-walled bearing and the journal shall not be less than 90°, and the contact surface area It should not be less than 70% of the contact arc area; the contact surface area between the lower and side bearings of the four-open bearing and the journal should not be less than 70% of the area of each bearing; Sixth, the back of the thin-walled bearing should fit tightly with the bearing seat; when the outer diameter of the bearing is less than or equal to 200mm, its contact surface area should not be less than 85% of the back area of the bearing; when the outer diameter of the bearing is greater than 200mm, its contact area should not be less than 70% of the back area of the bearing, and the contact should be uniform; the assembly clearance of the thin-walled bearing should comply with the provisions of the equipment technical documents; the alloy layer on the bearing surface should not be scraped. When scraping is required, the inner surface of the bearing seat should be scraped;
Seventh, the horizontal deviation of the crankshaft installation should not be greater than 0.10/1000. And the measurement should be carried out on the main journal with a level at every 90° rotation of the crankshaft; 8. The verticality deviation of the crankshaft axis to the slideway axis should not be greater than 0.10/1000 (Figure 2.2.4-1);
9. Check the distance between the four positions of each crank (Figure 2.2.4-2), and the allowable deviation should comply with the provisions of the equipment technical documents; when there is no provision, the deviation should not be greater than 0.10/1000 of the stroke;
Figure 2.2.4-2 Measuring the distance between cranks
1-main journal, 2-crankshaft, 3-dial indicator 10. After the crankshaft is assembled, turn it for a few turns, and there should be no blocking phenomenon. Engineering Construction Standard Full Text Information System
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