GB 50274-1998 Specification for construction and acceptance of refrigeration equipment and air separation equipment installation projects
Some standard content:
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
GB50274—98
Code for construction and acceptance of refrigeration and airseperating equipment installation engineering
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
1998-12-01Implementation
Jointly Issued
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Code for construction and acceptance of refrigeration and airseperating equipment installation engineering engineeringGB50274-98
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
1998Beijing
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Notice on the release of "General Specifications for Construction and Acceptance of Mechanical Equipment Installation Engineering" and other ten national standardsJianbiao [1998] No. 9
According to the requirements of the State Planning Commission's Document No. 2630 [1986] and Document No. 2390 [1987], the ten standards such as "General Specifications 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 specifications are now approved as mandatory national standards and will be implemented from December 1, 1998. The original national standards "Construction and Acceptance Specifications for Mechanical Equipment Installation Projects" TJ231 and "Construction and Acceptance Specifications for Refrigeration Equipment Installation Projects" GBJ66-84 are abolished at the same time. "General Specifications for Construction and Acceptance of Mechanical Equipment Installation Projects" GB50231-98 "Construction and Acceptance Specifications for Continuous Conveying Equipment Installation Projects" GB50270-98 "Construction and Acceptance Specifications for Metal Cutting Machine Tool Installation Projects" GB50271-98 "Construction and Acceptance Specifications for Forging Equipment Installation Projects" GB50272-98 "Construction and Acceptance Specifications for Industrial Boiler Installation Projects" GB50273-98 "Construction and Acceptance Specifications for Refrigeration Equipment and Air Separation Equipment Installation Projects" GB50274-98||tt ||《Compressor, fan, pump installation project construction and acceptance specification》GB50275-98《Crushing, grinding equipment installation project construction and acceptance specification》GB50276-98《Casting equipment installation project construction and acceptance specification》GB50277-98《Lifting equipment installation project construction and acceptance specification》GB50278-98The above specifications are managed by the State Machinery Industry Bureau, and the specific interpretation and other work is the responsibility of the Installation Engineering Standard Quota Station of the Ministry of Machinery Industry, and the publication and distribution is organized by the Standard 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 and Electronics Industry in accordance with the requirements of the State Planning Commission's Document No. 450 (1986), and is specifically compiled by the Mechanical Equipment Installation Engineering Standard Quota Station of the Ministry of Machinery and Electronics Industry in conjunction with relevant units. During the revision process, the specification group conducted extensive investigations and studies, carefully summarized the experience since the implementation of the original specification, absorbed some scientific research results, and widely solicited opinions from relevant units across the country. Finally, our department reviewed and finalized the draft together with relevant departments. This specification is divided into four chapters and two appendices. The main contents of this revision are: 1. Added combined cold storage, eliminated steam jet refrigeration equipment and cold storage, etc., and expanded the scope of application of this specification; 2. According to the manufacturing standards equivalent to international or foreign advanced technologies recently formulated by the refrigeration equipment and air separation equipment manufacturing industry, revised the corresponding installation and construction acceptance specifications,
3. Enriched the relevant content, such as the system test run of refrigeration equipment, purge, air tightness, vacuum test and ammonia filling leak detection, etc., the bare cold test and system test run of air separation equipment have been greatly modified;
4. Adopted effective construction methods and construction processes, eliminated the more backward methods and processes. For example, for the welding of refrigerant pipelines, the methods of argon arc welding for bottom sealing and arc welding for surface covering are promoted: the method of checking leakage by pressure drop, the specific gravity index of refrigerant water after mixing with lithium bromide, etc.
5. The measurement units, nouns and terms have been greatly modified according to the current national standards and the industry standards for refrigeration equipment and air separation equipment manufacturing. During the implementation of this specification, if any modification or supplement is found, please send your opinions and relevant materials to the Machinery Industry Installation Engineering Standard Quota Station and the Management Group of "Construction and Acceptance Specifications for Refrigeration Equipment and Air Separation Equipment Installation Engineering" (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
Section 7
Section 8
Chapter 3
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6 Section
Section 7
Section 8
Section 9
Section 10
Refrigeration equipment
General provisions
Piston refrigeration compressors and compressor units
Screw refrigeration compressor units
Centrifugal refrigeration units
Ancillary equipment and pipelines
Compression refrigeration system test run
Lithium bromide absorption refrigeration units
Combined cold storage
Air separation equipment
General provisions
Distillation tower assembly
Overall pressure test
Overall Bare cold test
Filling insulation material
Rare gas extraction equipment
Turbine expander
Piston expander
Centrifugal cryogenic liquid pump
Section 11
Section 12
Section 13
Section 14
Plunger cryogenic liquid pump
Regenerative refrigerator:
Other equipment
Trial operation
Engineering construction standard full text information system
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Work Engineering Construction Standard Full Text Information System
Chapter 4
Project Acceptance
Appendix 1
Appendix 2
Appendix 3
Water vapor saturation pressure corresponding to ambient temperatureActivation conditions of commonly used adsorbents and catalystsExplanation 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 refrigeration equipment and air separation equipment and promote the advancement of installation technology. Article 1.0.2 This specification applies to the construction and acceptance of installation projects of refrigeration equipment and air separation equipment.
Article 1.0.3
Construction.
The installation of refrigeration equipment and air separation equipment shall comply with the provisions of the current national standards and specifications in addition to the implementation of this specification.
||The second draft of the engineering construction standard
Refrigeration equipment
Section 1 General provisions
Section 2.1.Article 1 This chapter applies to the installation of compression refrigeration equipment (refrigerants are R717, R22, R502, R12, R11) with piston, screw and centrifugal compressors as the main machine, as well as lithium bromide absorption refrigeration units and combined cold storage. Article 2.1.2 When installing the refrigeration unit or compressor unit that is shipped as a whole within the specified anti-rust guarantee period, the oil seal and gas seal should be in good condition and free of rust, and the inside of the unit does not need to be disassembled and cleaned. When the anti-rust guarantee period is exceeded or there are obvious defects, the inside of the unit should be disassembled and cleaned according to the requirements of the equipment technical documents.
Article 2.1.3 When installing the refrigeration unit that is shipped as a whole, it should be aligned and leveled on the reference surface of the base, and if there are vibration reduction requirements, it should be carried out according to the design requirements. Article 2.1.4 When installing refrigeration equipment, copper and copper alloy materials shall not be used for the parts that come into contact with the refrigerant ammonia (R717); aluminum sealing gaskets that come into contact with the refrigerant shall use high-purity aluminum.
Article 2.1.5 When installing refrigeration equipment, the valves and instruments used shall meet the requirements of the corresponding media; the sealing materials for flanges, threads, etc. shall be oil-resistant rubber asbestos sheets, polytetrafluoroethylene film tapes, chloroprene rubber sealing liquids, etc. Article 2.1.6 In addition to complying with the provisions of this specification, the welding of refrigerant pipelines should adopt the welding process of argon arc welding bottom sealing and arc welding cover surface. Article 2.1.7 During the trial operation of refrigeration equipment, the discharge of Freon refrigerants into the surrounding environment should be avoided to prevent environmental pollution. Section 2 Piston Refrigeration Compressors and Compressor Units Article 2.2.1 This section applies to the installation of single refrigeration compressors and compressor units with common bases that are shipped as a whole. The installation of disassembled piston refrigeration compressors shall be carried out in accordance with the relevant provisions of the current national standard "Construction and Acceptance Specifications for Compressor, Fan and Pump Installation Projects".
Article 2.2.2 The longitudinal and transverse installation level deviations of the compressor and compressor unit should not be greater than 1/1000, and should be measured on the exposed part of the crankshaft, the base or the machined surface parallel to the base.
Article 2.2.3 For the connection between the compressor and the motor, for those without a common base, the compressor shall be used as the standard, and the coupling or pulley shall be adjusted and the motor shall be aligned according to the requirements of the equipment technical documents. For those with a common base, the alignment of the coupling shall be rechecked. Article 2.2.4 The no-load test run, air load test run and vacuum test in the factory test record of the open compressor shall all be carried out during the test run. Article 2.2.5 The compressor and compressor unit shall meet the following requirements before trial operation: 1. The cylinder head, suction and exhaust valves and crankcase cover shall be removed for inspection, and their internal cleanliness and fixation shall be in good condition; a small amount of refrigeration oil shall be added to the inner wall of the cylinder, and then the cylinder head shall be installed. Turn the compressor several times, and all moving parts shall rotate flexibly without overtightening or jamming.
2. The specifications and oil level of the refrigeration oil added to the crankcase shall comply with the provisions of the equipment technical documents;
3. The water supply of the cooling water system shall be unobstructed;
4. The safety valve shall be calibrated and adjusted, and its action shall be sensitive and reliable; 5. The setting values of relays such as pressure, temperature, and pressure difference shall comply with the provisions of the equipment technical documents;
6. Check the jog motor, and its direction of rotation shall be correct, but this item is not required for semi-enclosed compressors.
Article 2.2.6 The no-load test run of the compressor and compressor unit shall meet the following requirements:
1. The cylinder head and the suction and exhaust valve groups shall be removed first and the cylinder sleeve shall be fixed; 2. The compressor shall be started and run for 10 minutes. After stopping, check the lubrication and temperature rise of each part, which shall be normal. Then continue to run for another 1 hour; 3. The operation shall be stable, without abnormal sound and violent vibration; Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
4. The temperature of the outer side of the main bearing and the outer side of the shaft seal shall be normal; 5. The oil supply of the oil pump shall be normal;
6. There shall be no oil dripping at the oil seal; 7. After stopping, check that there shall be no abnormal wear on the inner wall of the cylinder. Article 2.2.7 The air load test run of the compressor shall meet the following requirements: 1. After the suction and exhaust valve groups are installed and fixed, the dead point clearance of the piston shall be adjusted and shall comply with the provisions of the equipment technical documents;
2. An air filter shall be installed at the suction port of the compressor; 3. When the suction pressure is at atmospheric pressure, the exhaust pressure shall be 0.3MPa (absolute pressure) for water cooling and 0.2MPa (absolute pressure) for non-water cooling, and shall run continuously for no less than 1h; 4. The operation of the oil pressure regulating valve shall be flexible, and the adjusted oil pressure shall be 0.15~0.3MPa higher than the suction pressure
5. The operation of the energy regulating device shall be flexible and correct; 6. The allowable temperature rise of each part of the compressor shall comply with the provisions of Table 2.2.7; Each part of the compressor Allowable temperature rise of the engine
Inspection parts
Outer surface of main bearing
Outer surface of shaft seal
Lubricating oil
With water cooling (C)
Without water cooling (℃)
VII. The inlet temperature of the cooling water of the cylinder liner should not be greater than 35℃, and the outlet temperature should not be greater than 45℃;
VIII. The operation should be smooth, without abnormal sound and vibration; IX. The valve plate of the suction and exhaust valves should respond normally to the beating sound; X. There should be no air leakage, oil leakage or water leakage in the connecting parts, shaft seal, packing, cylinder head and valve parts;
XI. After the air load test run, the air filter and oil filter should be disassembled and cleaned, and the lubricating oil should be replaced.
Article 2.2.8 The vacuum test of compressors and compressor units shall meet the following requirements:
1. The suction and exhaust stop valves shall be closed, and the exhaust hole shall be opened, and the compressor shall be started to vacuum:
2. The crankcase pressure shall be quickly pumped to 0.015MPa (absolute pressure); 3. The oil pressure shall not be lower than 0.1MPa (absolute pressure). Article 2.2.9 The load test run of compressors and compressor units shall be carried out after the system is filled with refrigerant. In addition to complying with the provisions of the fourth to tenth paragraphs of Article 2.2.7 of this Code during trial operation (except oil temperature), the following requirements shall also be met: 1. For compressors using Freon refrigerants, the lubricating oil in the hot crankcase shall be heated before starting according to the requirements of the equipment technical documents; 2. The oil temperature of the lubricating oil during operation shall not be greater than 70°C for open units and 80°C for semi-closed units;
3. The maximum exhaust temperature shall comply with the provisions of Table 2.2.9; the maximum exhaust temperature of the compressor
refrigerant
maximum High exhaust temperature (℃)
4. The oil seepage at the shaft seal of the open compressor should not exceed 0.5mL/h. Section 3 Screw Refrigeration Compressor Unit
Article 2.3.1 This section applies to the installation of screw refrigeration compressor units with components such as compressors, motors, oil separators and oil coolers on the same base. Article 2.3.2 The longitudinal and lateral installation level deviations of the compressor unit should not be greater than 1/1000 and should be measured on the base or on the machined surface parallel to the base. Engineering Construction Standard Full Text Information SystemArticle 2 The longitudinal and transverse installation level deviations of the compressor and compressor unit should not be greater than 1/1000, and should be measured on the exposed part of the crankshaft, the base or the machined surface parallel to the base.
Article 2.2.3 The connection between the compressor and the motor, for those without a common base, shall be based on the compressor, and the coupling or pulley shall be adjusted according to the requirements of the equipment technical documents, and the motor shall be aligned. For those with a common base, the alignment of the coupling shall be rechecked. Article 2.2.4 The no-no-load test run, air load test run and vacuum test in the factory test record of the open compressor shall all be carried out during the test run. Article 2.2.5 The compressor and compressor unit shall meet the following requirements before trial operation: 1. The cylinder head, suction and exhaust valves and crankcase cover shall be removed for inspection, and their internal cleanliness and fixation shall be in good condition; a small amount of refrigeration oil shall be added to the inner wall of the cylinder, and then the cylinder head shall be installed. Turn the compressor several times, and all moving parts shall rotate flexibly without overtightening or jamming.
2. The specifications and oil level of the refrigeration oil added to the crankcase shall comply with the provisions of the equipment technical documents;
3. The water supply of the cooling water system shall be unobstructed;
4. The safety valve shall be calibrated and adjusted, and its action shall be sensitive and reliable; 5. The setting values of relays such as pressure, temperature, and pressure difference shall comply with the provisions of the equipment technical documents;
6. Check the jog motor, and its direction of rotation shall be correct, but this item is not required for semi-enclosed compressors.
Article 2.2.6 The no-load test run of the compressor and compressor unit shall meet the following requirements:
1. The cylinder head and the suction and exhaust valve groups shall be removed first and the cylinder sleeve shall be fixed; 2. The compressor shall be started and run for 10 minutes. After stopping, check the lubrication and temperature rise of each part, which shall be normal. Then continue to run for another 1 hour; 3. The operation shall be stable, without abnormal sound and violent vibration; Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
4. The temperature of the outer side of the main bearing and the outer side of the shaft seal shall be normal; 5. The oil supply of the oil pump shall be normal;
6. There shall be no oil dripping at the oil seal; 7. After stopping, check that there shall be no abnormal wear on the inner wall of the cylinder. Article 2.2.7 The air load test run of the compressor shall meet the following requirements: 1. After the suction and exhaust valve groups are installed and fixed, the dead point clearance of the piston shall be adjusted and shall comply with the provisions of the equipment technical documents;
2. An air filter shall be installed at the suction port of the compressor; 3. When the suction pressure is at atmospheric pressure, the exhaust pressure shall be 0.3MPa (absolute pressure) for water cooling and 0.2MPa (absolute pressure) for non-water cooling, and shall run continuously for no less than 1h; 4. The operation of the oil pressure regulating valve shall be flexible, and the adjusted oil pressure shall be 0.15~0.3MPa higher than the suction pressure
5. The operation of the energy regulating device shall be flexible and correct; 6. The allowable temperature rise of each part of the compressor shall comply with the provisions of Table 2.2.7; Each part of the compressor Allowable temperature rise of the engine
Inspection parts
Outer surface of main bearing
Outer surface of shaft seal
Lubricating oil
With water cooling (C)
Without water cooling (℃)
VII. The inlet temperature of the cooling water of the cylinder liner should not be greater than 35℃, and the outlet temperature should not be greater than 45℃;Www.bzxZ.net
VIII. The operation should be smooth, without abnormal sound and vibration; IX. The valve plate of the suction and exhaust valves should respond normally to the beating sound; X. There should be no air leakage, oil leakage or water leakage in the connecting parts, shaft seal, packing, cylinder head and valve parts;
XI. After the air load test run, the air filter and oil filter should be disassembled and cleaned, and the lubricating oil should be replaced.
Article 2.2.8 The vacuum test of compressors and compressor units shall meet the following requirements:
1. The suction and exhaust stop valves shall be closed, and the exhaust hole shall be opened, and the compressor shall be started to vacuum:
2. The crankcase pressure shall be quickly pumped to 0.015MPa (absolute pressure); 3. The oil pressure shall not be lower than 0.1MPa (absolute pressure). Article 2.2.9 The load test run of compressors and compressor units shall be carried out after the system is filled with refrigerant. In addition to complying with the provisions of the fourth to tenth paragraphs of Article 2.2.7 of this Code during trial operation (except oil temperature), the following requirements shall also be met: 1. For compressors using Freon refrigerants, the lubricating oil in the hot crankcase shall be heated before starting according to the requirements of the equipment technical documents; 2. The oil temperature of the lubricating oil during operation shall not be greater than 70°C for open units and 80°C for semi-closed units;
3. The maximum exhaust temperature shall comply with the provisions of Table 2.2.9; the maximum exhaust temperature of the compressor
refrigerant
maximum High exhaust temperature (℃)
4. The oil seepage at the shaft seal of the open compressor should not exceed 0.5mL/h. Section 3 Screw Refrigeration Compressor Unit
Article 2.3.1 This section applies to the installation of screw refrigeration compressor units with components such as compressors, motors, oil separators and oil coolers on the same base. Article 2.3.2 The longitudinal and lateral installation level deviations of the compressor unit should not be greater than 1/1000 and should be measured on the base or on the machined surface parallel to the base. Engineering Construction Standard Full Text Information SystemArticle 2 The longitudinal and transverse installation level deviations of the compressor and compressor unit should not be greater than 1/1000, and should be measured on the exposed part of the crankshaft, the base or the machined surface parallel to the base.
Article 2.2.3 The connection between the compressor and the motor, for those without a common base, shall be based on the compressor, and the coupling or pulley shall be adjusted according to the requirements of the equipment technical documents, and the motor shall be aligned. For those with a common base, the alignment of the coupling shall be rechecked. Article 2.2.4 The no-no-load test run, air load test run and vacuum test in the factory test record of the open compressor shall all be carried out during the test run. Article 2.2.5 The compressor and compressor unit shall meet the following requirements before trial operation: 1. The cylinder head, suction and exhaust valves and crankcase cover shall be removed for inspection, and their internal cleanliness and fixation shall be in good condition; a small amount of refrigeration oil shall be added to the inner wall of the cylinder, and then the cylinder head shall be installed. Turn the compressor several times, and all moving parts shall rotate flexibly without overtightening or jamming.
2. The specifications and oil level of the refrigeration oil added to the crankcase shall comply with the provisions of the equipment technical documents;
3. The water supply of the cooling water system shall be unobstructed;
4. The safety valve shall be calibrated and adjusted, and its action shall be sensitive and reliable; 5. The setting values of relays such as pressure, temperature, and pressure difference shall comply with the provisions of the equipment technical documents;
6. Check the jog motor, and its direction of rotation shall be correct, but this item is not required for semi-enclosed compressors.
Article 2.2.6 The no-load test run of the compressor and compressor unit shall meet the following requirements:
1. The cylinder head and the suction and exhaust valve groups shall be removed first and the cylinder sleeve shall be fixed; 2. The compressor shall be started and run for 10 minutes. After stopping, check the lubrication and temperature rise of each part, which shall be normal. Then continue to run for another 1 hour; 3. The operation shall be stable, without abnormal sound and violent vibration; Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
4. The temperature of the outer side of the main bearing and the outer side of the shaft seal shall be normal; 5. The oil supply of the oil pump shall be normal;
6. There shall be no oil dripping at the oil seal; 7. After stopping, check that there shall be no abnormal wear on the inner wall of the cylinder. Article 2.2.7 The air load test run of the compressor shall meet the following requirements: 1. After the suction and exhaust valve groups are installed and fixed, the dead point clearance of the piston shall be adjusted and shall comply with the provisions of the equipment technical documents;
2. An air filter shall be installed at the suction port of the compressor; 3. When the suction pressure is at atmospheric pressure, the exhaust pressure shall be 0.3MPa (absolute pressure) for water cooling and 0.2MPa (absolute pressure) for non-water cooling, and shall run continuously for no less than 1h; 4. The operation of the oil pressure regulating valve shall be flexible, and the adjusted oil pressure shall be 0.15~0.3MPa higher than the suction pressure
5. The operation of the energy regulating device shall be flexible and correct; 6. The allowable temperature rise of each part of the compressor shall comply with the provisions of Table 2.2.7; Each part of the compressor Allowable temperature rise of the engine
Inspection parts
Outer surface of main bearing
Outer surface of shaft seal
Lubricating oil
With water cooling (C)
Without water cooling (℃)
VII. The inlet temperature of the cooling water of the cylinder liner should not be greater than 35℃, and the outlet temperature should not be greater than 45℃;
VIII. The operation should be smooth, without abnormal sound and vibration; IX. The valve plate of the suction and exhaust valves should respond normally to the beating sound; X. There should be no air leakage, oil leakage or water leakage in the connecting parts, shaft seal, packing, cylinder head and valve parts;
XI. After the air load test run, the air filter and oil filter should be disassembled and cleaned, and the lubricating oil should be replaced.
Article 2.2.8 The vacuum test of compressors and compressor units shall meet the following requirements:
1. The suction and exhaust stop valves shall be closed, and the exhaust hole shall be opened, and the compressor shall be started to vacuum:
2. The crankcase pressure shall be quickly pumped to 0.015MPa (absolute pressure); 3. The oil pressure shall not be lower than 0.1MPa (absolute pressure). Article 2.2.9 The load test run of compressors and compressor units shall be carried out after the system is filled with refrigerant. In addition to complying with the provisions of the fourth to tenth paragraphs of Article 2.2.7 of this Code during trial operation (except oil temperature), the following requirements shall also be met: 1. For compressors using Freon refrigerants, the lubricating oil in the hot crankcase shall be heated before starting according to the requirements of the equipment technical documents; 2. The oil temperature of the lubricating oil during operation shall not be greater than 70°C for open units and 80°C for semi-closed units;
3. The maximum exhaust temperature shall comply with the provisions of Table 2.2.9; the maximum exhaust temperature of the compressor
refrigerant
maximum High exhaust temperature (℃)
4. The oil seepage at the shaft seal of the open compressor should not exceed 0.5mL/h. Section 3 Screw Refrigeration Compressor Unit
Article 2.3.1 This section applies to the installation of screw refrigeration compressor units with components such as compressors, motors, oil separators and oil coolers on the same base. Article 2.3.2 The longitudinal and lateral installation level deviations of the compressor unit should not be greater than 1/1000 and should be measured on the base or on the machined surface parallel to the base. Engineering Construction Standard Full Text Information SystemArticle 8 The vacuum test of compressors and compressor units shall meet the following requirements:
1. The suction and exhaust stop valves shall be closed, and the exhaust hole shall be opened, and the compressor shall be started to vacuum:
2. The crankcase pressure shall be quickly pumped to 0.015MPa (absolute pressure); 3. The oil pressure shall not be lower than 0.1MPa (absolute pressure). Article 2.2.9 The load test run of compressors and compressor units shall be carried out after the system is filled with refrigerant. During the test run, in addition to complying with the provisions of the fourth to tenth paragraphs of Article 2.2.7 of this specification (except oil temperature), the following requirements shall also be met: 1. For compressors using Freon refrigerants, the lubricating oil in the hot crankcase shall be heated before starting according to the requirements of the equipment technical documents; 2. The oil temperature of the lubricating oil during operation shall not be greater than 70℃ for open units; and not greater than 80℃ for semi-closed units;
3. The maximum exhaust temperature shall comply with the provisions of Table 2.2.9; the maximum exhaust temperature of the compressor
Refrigerant
The maximum High exhaust temperature (℃)
4. The oil seepage at the shaft seal of the open compressor should not exceed 0.5mL/h. Section 3 Screw Refrigeration Compressor Unit
Article 2.3.1 This section applies to the installation of screw refrigeration compressor units with components such as compressors, motors, oil separators and oil coolers on the same base. Article 2.3.2 The longitudinal and lateral installation level deviations of the compressor unit should not be greater than 1/1000 and should be measured on the base or on the machined surface parallel to the base. Engineering Construction Standard Full Text Information SystemArticle 8 The vacuum test of compressors and compressor units shall meet the following requirements:
1. The suction and exhaust stop valves shall be closed, and the exhaust hole shall be opened, and the compressor shall be started to vacuum:
2. The crankcase pressure shall be quickly pumped to 0.015MPa (absolute pressure); 3. The oil pressure shall not be lower than 0.1MPa (absolute pressure). Article 2.2.9 The load test run of compressors and compressor units shall be carried out after the system is filled with refrigerant. During the test run, in addition to complying with the provisions of the fourth to tenth paragraphs of Article 2.2.7 of this specification (except oil temperature), the following requirements shall also be met: 1. For compressors using Freon refrigerants, the lubricating oil in the hot crankcase shall be heated before starting according to the requirements of the equipment technical documents; 2. The oil temperature of the lubricating oil during operation shall not be greater than 70℃ for open units; and not greater than 80℃ for semi-closed units;
3. The maximum exhaust temperature shall comply with the provisions of Table 2.2.9; the maximum exhaust temperature of the compressor
Refrigerant
The maximum High exhaust temperature (℃)
4. The oil seepage at the shaft seal of the open compressor should not exceed 0.5mL/h. Section 3 Screw Refrigeration Compressor Unit
Article 2.3.1 This section applies to the installation of screw refrigeration compressor units with components such as compressors, motors, oil separators and oil coolers on the same base. Article 2.3.2 The longitudinal and lateral installation level deviations of the compressor unit should not be greater than 1/1000 and should be measured on the base or on the machined surface parallel to the base. Engineering Construction Standard Full Text Information System
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