GBJ 66-1984 Refrigeration Equipment Installation Engineering Construction and Acceptance Specification GBJ66-84
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National Standard of the People's Republic of China
Refrigeration equipment installation engineering construction
and acceptance specification
GBJ66—84
1984 Beijing
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National Standard of the People's Republic of China
Refrigeration equipment installation
Model engineering and acceptance specification
GBJ66—84
Editor department: Mechanical Engineering of the People's Republic of China Ministry of Industry Approval Department: State Planning Commission of the People's Republic of China Implementation Date: August 1, 1984
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Notice on Issuing "Construction and Acceptance Specifications for Refrigeration Equipment Installation Engineering"
Ji Biao [1984] No. 049
According to the requirements of the former State Construction Commission (72) Jianshe Shi Zi No. 135, the "Construction and Acceptance Specifications for Refrigeration Equipment Installation Engineering" compiled by the Ministry of Machinery Industry in conjunction with relevant units has been reviewed by relevant departments. The "Construction and Acceptance Specifications for Refrigeration Equipment Installation Engineering" GBJ66-84 is now approved as a national standard and will be implemented from August 1, 1984. This specification is managed by the Ministry of Machinery Industry, and its specific interpretation and other work are the responsibility of the Hefei General Machinery Research Institute of the Ministry of Machinery Industry.
National Planning Commission
January 10, 1984
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Preparation Instructions
This specification is compiled by the Installation General Company of our Ministry and the Hefei General Machinery Research Institute in conjunction with relevant units in accordance with the requirements of the former National Capital Construction Commission (72) Construction Implementation No. 135.
During the compilation of this specification, a relatively extensive investigation and research was conducted, summarizing the experience in the installation, construction and use of refrigeration equipment, and widely soliciting opinions from relevant units across the country. Finally, the draft was reviewed and finalized in conjunction with relevant departments. This specification is divided into seven chapters and one appendix, and its main contents include: general provisions, installation and trial operation of refrigeration units and piston, screw, centrifugal, lithium bromide absorption and steam injection refrigeration equipment.
During the implementation of this specification, we hope that all units will pay attention to accumulating information and summarizing experience. If you find any need for modification and supplementation, please send the relevant information and opinions to the Hefei General Machinery Research Institute for reference in future revisions. Ministry of Machinery Industry
December 1983
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Engineering Construction Standard Full Text Information System
Chapter 1 General Provisions
Chapter 2 Installation and Trial Operation of Refrigeration Units Chapter 3 Installation and Trial Operation of Piston Refrigeration Equipment...3
Section 1 Installation of Integrally Installed Piston Refrigeration Compressors and Compressor Units.....6
Section 2 Installation of Ancillary Equipment and Pipelines
Section 3 Trial Operation of Piston Refrigeration Compressors and Their Systems Chapter 4 Installation and Commissioning Chapter 5 Installation and commissioning of centrifugal refrigeration equipment Chapter 6
......
··14
Installation and commissioning of lithium bromide absorption refrigeration equipment Chapter 7
Installation and commissioning of steam jet refrigeration equipment....
Appendix Explanation of terms used in this specification
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Chapter 1 General Provisions
Article 1.0.1 In order to ensure the quality of refrigeration equipment installation construction, this specification is specially formulated.
Article 1.0.2 This specification applies to the construction and acceptance of refrigeration units, refrigeration compressors and auxiliary equipment, as well as piston, screw, centrifugal, absorption, steam jet and other refrigeration equipment installation projects.
The general technical requirements for the construction and acceptance of refrigeration equipment installation projects shall be implemented in accordance with the national standard "General Provisions of Mechanical Equipment Installation Project Construction and Acceptance Specifications" TJ231 (I)-75.
The installation of piston refrigeration compressors assembled on site and large centrifugal refrigeration compressors used in chemical processes shall be implemented in accordance with the relevant provisions of the national standard "Mechanical Equipment Installation Project Construction and Acceptance Specifications" TJ231 (V)-78. Article 1.0.3 The disassembly and cleaning of refrigeration equipment shall meet the following requirements: For refrigeration units, integrally installed refrigeration compressors and absorption refrigeration equipment, the surface should generally be cleaned and the vacuum condition (or inflation internal pressure condition) in the unit should be checked. For equipment that meets the requirements of relevant equipment documents, its internal parts Parts do not need to be disassembled and cleaned, but if they have exceeded the warranty period or have obvious defects, they should also be cleaned. 2. For various types of refrigeration equipment assembled on site, the main machine parts, auxiliary equipment and pipelines should be cleaned before installation. After cleaning, the cleaning agent and moisture should be removed, and the surface of the parts should be checked for damage and defects. If qualified, a thin layer of refrigeration oil should be applied to the surface.
Article 1.0.4 When installing ammonia refrigeration equipment, it is strictly prohibited to use copper and copper alloy materials for parts prepared on site.
Article 1.0.5 The installation of refrigeration equipment must use special refrigeration valves and instruments; the sealing materials for flanges, threaded joints, etc. of refrigeration equipment should be oil-resistant asbestos rubber sheets, polytetrafluoroethylene film tapes, glycerol-alumina or chloroprene rubber sealing liquids, etc. Engineering construction Engineering Standards Full Text Information System
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Article 1.0.6 The welding of refrigeration equipment pipelines shall comply with the relevant provisions of the current national standard "Construction and Acceptance Specifications for Field Equipment and Industrial Pipeline Welding Engineering". Article 1.0.7 The installation of refrigeration equipment shall comply with the requirements of the current relevant equipment engineering design specifications and equipment technical documents. Engineering Construction Standards Full Text Information System
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Chapter 2 Installation and Commissioning of Refrigeration Units Article 2.0.1 Refrigeration unit refers to an integrated or assembled refrigeration device including a compressor, an electric motor and a complete set of ancillary equipment. Article 2.0.2 The refrigeration unit shall be installed on the base of the base. Align and level the surface. Article 2.0.3 The wiring and pipeline connection of the automatic control components, safety protection relays, and electrical instruments of the refrigeration unit should be correct. Article 2.0.4 Refrigeration units that leave the factory but are not filled with refrigerant should be filled with refrigerant in accordance with the provisions of the relevant equipment technical documents. If there is no provision in the equipment technical documents, they should be filled in the following order: 1. Air tightness test;
2. Use a vacuum pump to pump the system until the residual pressure is less than 5.332 kPa; 3. Fill with refrigerant and check for leaks.
Article 2.0.5 The air tightness test of the refrigeration unit shall meet the following requirements: 1. When it is difficult to distinguish the test pressure for high and low pressure systems according to the provisions of Table 2.0.5, the system air tightness test can be uniformly carried out according to the low pressure system test pressure. 2. Maintain at the specified pressure for 24 hours, then start recording the pressure gauge reading after 6 hours of inflation, and after 18 hours, the pressure should not exceed the calculated value calculated by the following formula. If it exceeds the calculated value, a leak check should be carried out, and the leak should be eliminated after identification, and the test should be repeated until it passes. bZxz.net
△P=Pi-P2=Pi1
273+t2
Where△P—pressure drop [MPa (kgf/cm2; (2.0.5)
P1—gas pressure in the system at the beginning of the test [MPa (kgf/cm2;
P2—gas pressure in the system at the end of the test [MPa (kgf/cm2;
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tr——gas temperature in the system at the beginning of the test (℃); t2—gas temperature in the system at the end of the test (℃). 3. Nitrogen or dry air should be used to pressurize the system in the airtightness test. Airtightness test pressure [MPa (kgf/cm2)] Refrigerant
R717, R22
High-pressure system test pressure
1.764 (18)
1.568(16）
0.196 (2)
Low pressure system test pressure
1.176 (12)
0.196 (2)
Article 2.0.6 After the air tightness test of the refrigeration unit is passed, the system shall be evacuated by a vacuum pump until the residual pressure is less than 5.332 kPa (40 mmHg) and maintained for 24 hours. The system pressure increase shall not exceed 0.667 kPa (5 mmHg). Article 2.0.7 When charging the refrigeration unit with refrigerant, the cylinder containing qualified refrigerant shall be connected to the filling valve of the unit, and the refrigerant shall be injected into the system by using the vacuum degree of the unit. When the pressure in the system rises to 0.196~0.294 MPa (2~3 kgf/cm2) (Freon) or 0.098～0.196 MPa (1～2 kgf/cm2) (ammonia), the system should be checked for leaks; after the leak is found, it should be repaired and refilled with refrigerant. When the system pressure is the same as the cylinder pressure, the compressor can be started to speed up the filling speed until the refrigerant weight specified in the relevant equipment technical documents is met. Article 2.0.8 The trial operation of the refrigeration unit shall meet the following requirements: 1. Before trial operation
1. Check the setting value of the safety protection relay; 2. Check the oil level of the oil tank;
3. Open the corresponding valves in the system;
4. Supply cooling water to the equipment;
5. Supply refrigerant liquid to the evaporator;
6. Adjust the energy adjustment device to the minimum load position or open the bypass valve. 2. Start-up and operation
1. Start the compressor and check the oil pressure immediately. After the compressor speed stabilizes, its oil pressure should meet the requirements of the relevant equipment technical documents (first start the oil pump for the special oil supply pump).
2. When starting the positive displacement compressor, the suction stop valve and throttle valve should be opened slowly; 3. Check the safety protection relay, which should be sensitive; 4. The required operation time under the minimum load should be determined according to the on-site conditions and the requirements of the equipment technical documents;
5. Operation The following inspections should be carried out during the operation and records should be kept; (1) The height of the oil level in the oil tank and the oil supply in each part; (2) The pressure and temperature of the lubricating oil; (3) The pressure and temperature of the suction and exhaust gas; (4) The temperature of the inlet and outlet water and the supply of cooling water; (5) Whether there are abnormal sounds in the moving parts, and whether the connection parts are loose, leaking, leaking oil, leaking water, etc.; (6) The current, voltage and temperature rise of the motor; (7) Whether the energy regulating device is sensitive, and whether the float valve and other liquid level gauges are working stably; (8) The noise and vibration of the unit. III. Stopping the compressor 1. The operation of the compressor should be stopped in the order specified in the equipment technical documents; 2. Finally, the water pump or fan system should be turned off, and all the easily frozen accumulated water should be discharged. Article 2.0.9 After the refrigeration unit is put into trial operation, the suction filter and oil filter should be disassembled and cleaned, and the lubricating oil should be replaced.
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Chapter 3 Installation and Trial Operation of Piston Refrigeration Equipment
Section 1 Installation of Piston Refrigeration Compressors and Compressor Units Installed as a Whole
Article 3.1.1 This section applies to the installation of single refrigeration compressors installed as a whole and compressor units with a common base (including compressors, motors or compression condensing units).
Article 3.1.2 The installation of compressors and compressor units should be aligned and leveled on the exposed part of the crankshaft or other processing planes parallel to the compressor base, and the longitudinal and lateral unevenness should not exceed 0.2/1000. Article 3.1.3 During installation, the motor level should be aligned and the coupling or pulley should be adjusted according to the position of the compressor.
Section 2 Installation of Auxiliary Equipment and Pipelines
Article 3.2.1 Before the auxiliary equipment of the refrigeration compressor (such as condenser, liquid receiver, oil separator, intercooler, oil collector, air separator and evaporator, etc.) is in place, the position of its pipe mouth, the position of the anchor bolt hole and the foundation shall meet the design requirements, and the inside of the pipe mouth shall be unobstructed.
Article 3.2.2 The test pressure for air tightness test using nitrogen or dry air as the medium shall comply with the provisions of Article 2.0.5 of this Code. During the test, it is advisable to apply a foaming agent to the bolted joints and welded joints to observe whether there is leakage. Article 3.2.3 In addition to complying with the relevant provisions of the design specifications, the installation of auxiliary equipment shall also meet the following requirements:
1. The horizontality of horizontal equipment and the plumbness of vertical equipment shall comply with the provisions of the relevant equipment technical documents.
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2. When installing equipment with an oil collector, one end of the oil collector should be slightly lower, and its slope should comply with the provisions of the relevant equipment technical documents. 3. The liquid inlet of the washing oil separator should be lower than the liquid outlet of the condenser. 4. When installing low-temperature equipment, additional pads should be installed. The pads should be treated with anti-corrosion in advance.
5. When installing equipment, the pipe joints should be distinguished and wrong connections are strictly prohibited. Article 3.2.4 The laying of refrigeration equipment pipelines shall not only comply with the current national standard "Industrial Pipeline Engineering Construction and Acceptance Specifications", but also meet the following requirements: 1. The oxide scale, dirt and other debris in the pipeline should be removed by sandblasting, and the two ends should be sealed after the metallic glossy surface appears. 2. The liquid supply pipe in the system should not have an upward convex bend, and the suction pipe should not have a downward concave bend, as shown in Figure 3.2.4. Figure 3.2.4 Schematic diagram of the convex and concave bends of the pipes in the system a-liquid supply pipe; b-intake pipe
3. Flanges, parts and welds connecting pipes should not be buried in walls or in places that are inconvenient for maintenance. When the exhaust pipe passes through the wall, a protective sleeve should be added: a gap of about 10 mm should be left between the pipe and the sleeve; the gap should not be filled with materials. Pipes placed on the bracket should not be lined with wood, but pipes wrapped with insulation layers should be lined with wood; the thickness of the wood should be the same as the thickness of the insulation layer.
Article 3.2.5 The laying slope of the connecting pipes between equipment shall comply with the provisions of Table 3.2.5; the slope shall comply with the provisions of the design or equipment technical documents. Engineering Construction Standard Full-text Information SystemArticle 1 Before the auxiliary equipment of the refrigeration compressor (such as condenser, liquid receiver, oil separator, intercooler, oil collector, air separator and evaporator, etc.) is in place, the position of the pipe mouth, the position of the anchor bolt hole and the foundation shall meet the design requirements, and the inside of the pipe mouth shall be unobstructed.
Article 3.2.2 The test pressure for air tightness test using nitrogen or dry air as the medium shall comply with the provisions of Article 2.0.5 of this specification. During the test, it is advisable to apply a foaming agent to the bolted joints and welded joints to observe whether there is leakage. Article 3.2.3 In addition to complying with the relevant provisions of the design specifications, the installation of auxiliary equipment shall also meet the following requirements:
1. The horizontality of horizontal equipment and the plumbness of vertical equipment shall comply with the provisions of the relevant equipment technical documents.
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2. When installing equipment with an oil collector, one end of the oil collector should be slightly lower, and its slope should comply with the provisions of the relevant equipment technical documents. 3. The liquid inlet of the washing oil separator should be lower than the liquid outlet of the condenser. 4. When installing low-temperature equipment, additional pads should be installed. The pads should be treated with anti-corrosion in advance.
5. When installing equipment, the pipe joints should be distinguished and wrong connections are strictly prohibited. Article 3.2.4 The laying of refrigeration equipment pipelines shall not only comply with the current national standard "Industrial Pipeline Engineering Construction and Acceptance Specifications", but also meet the following requirements: 1. The oxide scale, dirt and other debris in the pipeline should be removed by sandblasting, and the two ends should be sealed after the metallic glossy surface appears. 2. The liquid supply pipe in the system should not have an upward convex bend, and the suction pipe should not have a downward concave bend, as shown in Figure 3.2.4. Figure 3.2.4 Schematic diagram of the convex and concave bends of the pipes in the system a-liquid supply pipe; b-intake pipe
3. Flanges, parts and welds connecting pipes should not be buried in walls or in places that are inconvenient for maintenance. When the exhaust pipe passes through the wall, a protective sleeve should be added: a gap of about 10 mm should be left between the pipe and the sleeve; the gap should not be filled with materials. Pipes placed on the bracket should not be lined with wood, but pipes wrapped with insulation layers should be lined with wood; the thickness of the wood should be the same as the thickness of the insulation layer.
Article 3.2.5 The laying slope of the connecting pipes between equipment shall comply with the provisions of Table 3.2.5; the slope shall comply with the provisions of the design or equipment technical documents. Engineering Construction Standard Full-text Information SystemArticle 1 Before the auxiliary equipment of the refrigeration compressor (such as condenser, liquid receiver, oil separator, intercooler, oil collector, air separator and evaporator, etc.) is in place, the position of the pipe mouth, the position of the anchor bolt hole and the foundation shall meet the design requirements, and the inside of the pipe mouth shall be unobstructed.
Article 3.2.2 The test pressure for air tightness test using nitrogen or dry air as the medium shall comply with the provisions of Article 2.0.5 of this specification. During the test, it is advisable to apply a foaming agent to the bolted joints and welded joints to observe whether there is leakage. Article 3.2.3 In addition to complying with the relevant provisions of the design specifications, the installation of auxiliary equipment shall also meet the following requirements:
1. The horizontality of horizontal equipment and the plumbness of vertical equipment shall comply with the provisions of the relevant equipment technical documents.
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2. When installing equipment with an oil collector, one end of the oil collector should be slightly lower, and its slope should comply with the provisions of the relevant equipment technical documents. 3. The liquid inlet of the washing oil separator should be lower than the liquid outlet of the condenser. 4. When installing low-temperature equipment, additional pads should be installed. The pads should be treated with anti-corrosion in advance.
5. When installing equipment, the pipe joints should be distinguished and wrong connections are strictly prohibited. Article 3.2.4 The laying of refrigeration equipment pipelines shall not only comply with the current national standard "Industrial Pipeline Engineering Construction and Acceptance Specifications", but also meet the following requirements: 1. The oxide scale, dirt and other debris in the pipeline should be removed by sandblasting, and the two ends should be sealed after the metallic glossy surface appears. 2. The liquid supply pipe in the system should not have an upward convex bend, and the suction pipe should not have a downward concave bend, as shown in Figure 3.2.4. Figure 3.2.4 Schematic diagram of the convex and concave bends of the pipes in the system a-liquid supply pipe; b-intake pipe
3. Flanges, parts and welds connecting pipes should not be buried in walls or in places that are inconvenient for maintenance. When the exhaust pipe passes through the wall, a protective sleeve should be added: a gap of about 10 mm should be left between the pipe and the sleeve; the gap should not be filled with materials. Pipes placed on the bracket should not be lined with wood, but pipes wrapped with insulation layers should be lined with wood; the thickness of the wood should be the same as the thickness of the insulation layer.
Article 3.2.5 The laying slope of the connecting pipes between equipment shall comply with the provisions of Table 3.2.5; the slope shall comply with the provisions of the design or equipment technical documents. Engineering Construction Standard Full-text Information System
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