1 General Provisions
1.0.1 This standard is formulated with a view to guaranteeing quality and safe operation of fan, compressor and pump installation engineering, and promoting technological advances of fan, compressor and pump installation.
1.0.2 This standard is applicable to the construction and acceptance for installation engineering of the following fans, compressors and pumps:
1 Centrifugal fan, centrifugal blower, axial fan, axial blower, Roots and Jaeger blower, anti-explosion fan and firefighting smoke extractor fan;
2 Displacement reciprocating type, screw type, sliding blade type and membrane type compressor, axial flow compressor and centrifugal compressor;
3 Centrifugal pump, well pump, membrane pump, metering pump, mixed-flow pump, axial pump, vortex pump, screw pump, gear pump, rotor pump, submersible water pump, turbine pump, water ring pump, and reciprocating pump.
1.0.3 The construction and acceptance of fan, compressor and pump installation engineering shall not only comply with this standard, but also the requirements specified in the relevant current standards of the country.
2 Fan
2.1 Basic Requirements
2.1.1 The unpacking inspection of fans shall meet the following requirements:
1 Parts, components, auxiliary equipments and accompanying technical documents for fans shall be counted and inspected according to the equipment packing list;
2 The main installation sizes of impeller wheel, casing and other positions shall be checked according to the design drawing;
3 The model, conveyance medium, inlet/outlet direction (or angle) and pressure of fans shall correspond with the requirements of the engineering design; impeller wheel rotation direction, stator guide impeller and straightening blade angle/direction shall meet the requirements of the accompanying technical documents;
4 Finish surfaces of exposed fan parts shall be rustless; major parts and components, like rotor impeller wheel/axle neck, gear surface, and gear wheel shaft neck, shall be free of bumping or obvious deformation;
5 The rustproof packaging of fan shall be in good order and condition; the air inlet and outlet of factory assembled fans shall be shielded with cover plates, and kept from dust and sundries entering.
6 The protection measures shall be taken after the surface inspection for exposed vibration testing positions.
2.1.2 Handling and lifting of fans shall meet the following requirements:
1 For handling and hoisting factory assembled fans, the rope shall not bundled on lifting lugs of rotor/casing or bearing upper covers.
2 For handling and hoisting site assembled fans, the rope shall not damage component surface; rotor/gear axle neck or vibration testing position shall not be used as rope bundling positions; rotor and casing shall keep horizontal while hoisting.
3 The protective layer coated on fan rotor and casing for conveying special media shall be protected well from damage;
4 Rotors or gears shall not directly be rolled or moved on ground.
2.1.3 Besides the relevant requirements of "General Code for Construction and Acceptance of Mechanical Equipment Installation Engineering" GB 50231 and the accompanying technical document, the cleaning and inspection of fans before assembling shall also meet the following requirements:
1 Exposed finish surface, assembling fitting surface, sliding surface, as well as pipe, oil tank and vessel, for the equipment, shall be washed and cleaned, factory-assembled assembly parts shall be unpicked and washed if they exceed rust prevention period.
2 As for the compressors to convey combustible and explosive gases like hydrogen and oxygen, the parts, component, pipes as well as the accessories shall be de-oiled, and the oil residue level after de-oiling shall not be larger than 125 mg/m2; they shall be blown dry with dry air or nitrogen after de-oiling, and treated with oil-free sealing;
3 Oil pump, filter, oil cooler, safety valve, etc., equipped in lubricating system and sealing system shall be dismantled and cleaned;
4 The tightness test shall be conducted for oil cooler at maximum working pressure, and the oil cooler shall have no leakage, 10 min after pressure maintaining;
5 In the site assembly, mating surfaces and machining surface of the machine, surface of rotatable parts, as well as attached equipments of the components, shall be washed and cleaned; the rust, if have, shall be removed, and the rust-proofing measures shall be taken to prevent rusting during installation period;
6 The regulating mechanism shall be washed and cleaned, and it shall rotate smoothly.
2.1.4 Centering for shafts (axes) of fan units shall meet the following requirements:
1 The machine located in shafting or with large mass or great installation difficulty shall be selected as reference machine for centering.
2 Non-reference machine shall be centered and leveled on the base of reference machine, and the shafting of the unit in work shall be made continuous smooth curve equivalent to the lift on both ends;
3 The final centering of the unit shafting shall be conducted by practical rotor passing through the coupling, and it shall meet the requirements of items 1 and 2 in this article.
2.1.5 The end clearance, radial displacement and axial slope of the coupling shall meet the provisions of the accompanying technical documents; if no provisions related are available, the relevant provisions stated in the current national standard "General Code for Construction and Acceptance of Mechanical Equipment Installation Engineering" GB 50231 shall apply.
2.1.6 Besides the relevant requirements in the current national standards "Code for Construction and Acceptance of Industrial Metallic Piping" GB 50235 and "Code of Acceptance for Construction Quality of Ventilation and Air Conditioning Works" GB 50243, the air inlet, gas exhaust piping and other pipelines of fans shall meet the following requirements:
1 The pipeline, large valve, regulating device, cooling device and lubricating oil system, etc. of fan air inlet and gas exhaust systems, shall be provided with independent support. Such supports shall be connected firmly with the base or other buildings; for connecting with the fan casting, the external force shall not be applied on the fan casting. After the connection, the installation level and main clearance of the units shall be re-measured, and they shall meet the requirements of the accompanying technical documents;
Contents
1 General Provisions
2 Fan
2.1 Basic Requirements
2.2 Centrifugal Fan
2.3 Axial Fan
2.4 Roots and Jaeger Blower
2.5 Centrifugal Blower
2.6 Axial Blower
2.7 Anti-explosion Fan and Firefighting Smoke Extractor Fan
3 Compressor
3.1 Basic requirements
3.2 Factory Assembled Compressor
3.3 Site Assembled Reciprocating Compressor
3.4 Attached Equipments
3.5 Test run
3.6 Nonlubricated Compressor
3.7 Screw Type Compressors
3.8 Centrifugal Compressor and Axial Flow Compressor
4 Pump
4.1 Basic Requirements
4.2 Centrifugal Pump
4.3 Well Pump
4.4 Mixed-flow Pump, Axial Pump and Vortex Pump
4.5 Reciprocating Pump
4.6 Membrane Pump and Metering Pump
4.7 Screw Pump, Gear Pump and Rotor Pump
4.8 Water-ring Vacuum Pump
5 Engineering Acceptance
Appendix A Vibration Testing and Limits of Fan, Compressor and Pump
Appendix B Cleanness testing and limits of compressor and pump
Appendix C Requirements on Configuration of Pump Suction and Discharge Line
Explanation of Wording
List of Quoted Standards
1 General Provisions
1.0.1 This standard is formulated with a view to guaranteeing quality and safe operation of fan, compressor and pump installation engineering, and promoting technological advances of fan, compressor and pump installation.
1.0.2 This standard is applicable to the construction and acceptance for installation engineering of the following fans, compressors and pumps:
1 Centrifugal fan, centrifugal blower, axial fan, axial blower, Roots and Jaeger blower, anti-explosion fan and firefighting smoke extractor fan;
2 Displacement reciprocating type, screw type, sliding blade type and membrane type compressor, axial flow compressor and centrifugal compressor;
3 Centrifugal pump, well pump, membrane pump, metering pump, mixed-flow pump, axial pump, vortex pump, screw pump, gear pump, rotor pump, submersible water pump, turbine pump, water ring pump, and reciprocating pump.
1.0.3 The construction and acceptance of fan, compressor and pump installation engineering shall not only comply with this standard, but also the requirements specified in the relevant current standards of the country.
2 Fan
2.1 Basic Requirements
2.1.1 The unpacking inspection of fans shall meet the following requirements:
1 Parts, components, auxiliary equipments and accompanying technical documents for fans shall be counted and inspected according to the equipment packing list;
2 The main installation sizes of impeller wheel, casing and other positions shall be checked according to the design drawing;
3 The model, conveyance medium, inlet/outlet direction (or angle) and pressure of fans shall correspond with the requirements of the engineering design; impeller wheel rotation direction, stator guide impeller and straightening blade angle/direction shall meet the requirements of the accompanying technical documents;
4 Finish surfaces of exposed fan parts shall be rustless; major parts and components, like rotor impeller wheel/axle neck, gear surface, and gear wheel shaft neck, shall be free of bumping or obvious deformation;
5 The rustproof packaging of fan shall be in good order and condition; the air inlet and outlet of factory assembled fans shall be shielded with cover plates, and kept from dust and sundries entering.
6 The protection measures shall be taken after the surface inspection for exposed vibration testing positions.
2.1.2 Handling and lifting of fans shall meet the following requirements:
1 For handling and hoisting factory assembled fans, the rope shall not bundled on lifting lugs of rotor/casing or bearing upper covers.
2 For handling and hoisting site assembled fans, the rope shall not damage component surface; rotor/gear axle neck or vibration testing position shall not be used as rope bundling positions; rotor and casing shall keep horizontal while hoisting.
3 The protective layer coated on fan rotor and casing for conveying special media shall be protected well from damage;
4 Rotors or gears shall not directly be rolled or moved on ground.
2.1.3 Besides the relevant requirements of "General Code for Construction and Acceptance of Mechanical Equipment Installation Engineering" GB 50231 and the accompanying technical document, the cleaning and inspection of fans before assembling shall also meet the following requirements:
1 Exposed finish surface, assembling fitting surface, sliding surface, as well as pipe, oil tank and vessel, for the equipment, shall be washed and cleaned, factory-assembled assembly parts shall be unpicked and washed if they exceed rust prevention period.
2 As for the compressors to convey combustible and explosive gases like hydrogen and oxygen, the parts, component, pipes as well as the accessories shall be de-oiled, and the oil residue level after de-oiling shall not be larger than 125 mg/m2; they shall be blown dry with dry air or nitrogen after de-oiling, and treated with oil-free sealing;
3 Oil pump, filter, oil cooler, safety valve, etc., equipped in lubricating system and sealing system shall be dismantled and cleaned;
4 The tightness test shall be conducted for oil cooler at maximum working pressure, and the oil cooler shall have no leakage, 10 min after pressure maintaining;
5 In the site assembly, mating surfaces and machining surface of the machine, surface of rotatable parts, as well as attached equipments of the components, shall be washed and cleaned; the rust, if have, shall be removed, and the rust-proofing measures shall be taken to prevent rusting during installation period;
6 The regulating mechanism shall be washed and cleaned, and it shall rotate smoothly.
2.1.4 Centering for shafts (axes) of fan units shall meet the following requirements:
1 The machine located in shafting or with large mass or great installation difficulty shall be selected as reference machine for centering.
2 Non-reference machine shall be centered and leveled on the base of reference machine, and the shafting of the unit in work shall be made continuous smooth curve equivalent to the lift on both ends;
3 The final centering of the unit shafting shall be conducted by practical rotor passing through the coupling, and it shall meet the requirements of items 1 and 2 in this article.
2.1.5 The end clearance, radial displacement and axial slope of the coupling shall meet the provisions of the accompanying technical documents; if no provisions related are available, the relevant provisions stated in the current national standard "General Code for Construction and Acceptance of Mechanical Equipment Installation Engineering" GB 50231 shall apply.
2.1.6 Besides the relevant requirements in the current national standards "Code for Construction and Acceptance of Industrial Metallic Piping" GB 50235 and "Code of Acceptance for Construction Quality of Ventilation and Air Conditioning Works" GB 50243, the air inlet, gas exhaust piping and other pipelines of fans shall meet the following requirements:
1 The pipeline, large valve, regulating device, cooling device and lubricating oil system, etc. of fan air inlet and gas exhaust systems, shall be provided with independent support. Such supports shall be connected firmly with the base or other buildings; for connecting with the fan casting, the external force shall not be applied on the fan casting. After the connection, the installation level and main clearance of the units shall be re-measured, and they shall meet the requirements of the accompanying technical documents;
Contents of GB 50275-2010
Contents
1 General Provisions
2 Fan
2.1 Basic Requirements
2.2 Centrifugal Fan
2.3 Axial Fan
2.4 Roots and Jaeger Blower
2.5 Centrifugal Blower
2.6 Axial Blower
2.7 Anti-explosion Fan and Firefighting Smoke Extractor Fan
3 Compressor
3.1 Basic requirements
3.2 Factory Assembled Compressor
3.3 Site Assembled Reciprocating Compressor
3.4 Attached Equipments
3.5 Test run
3.6 Nonlubricated Compressor
3.7 Screw Type Compressors
3.8 Centrifugal Compressor and Axial Flow Compressor
4 Pump
4.1 Basic Requirements
4.2 Centrifugal Pump
4.3 Well Pump
4.4 Mixed-flow Pump, Axial Pump and Vortex Pump
4.5 Reciprocating Pump
4.6 Membrane Pump and Metering Pump
4.7 Screw Pump, Gear Pump and Rotor Pump
4.8 Water-ring Vacuum Pump
5 Engineering Acceptance
Appendix A Vibration Testing and Limits of Fan, Compressor and Pump
Appendix B Cleanness testing and limits of compressor and pump
Appendix C Requirements on Configuration of Pump Suction and Discharge Line
Explanation of Wording
List of Quoted Standards
