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Industry Standard of the People's Republic of China
HG 20555-93
Design Provisions for Centrifugal Compressors
1994-04-12 Issued:
1994-10-01
The Ministry of Chemical Industry of the People's Republic of China issued Industry Standard of the People's Republic of China
Design Provisions for Centrifugal Compressors
HG20555-93
Editor: Jilin Chemical Industry Company Design Institute Approved by: Ministry of Chemical Industry
Effective Date: October 1, 1994 Engineering Construction Standards Editing Center of the Ministry of Chemical Industry| |tt||1994 Beijing
Ministry of Chemical Industry Document
Chemical Construction Development (1994) No. 250
Notice on the issuance of six chemical industry standards including "Regulations on Basic Design of Piston Compressors"
Chemical Industry Departments (bureaus, companies) of provinces, autonomous regions, municipalities directly under the Central Government, and cities with independent planning status, and all relevant design units:
The six architectural design standards including "Regulations on Basic Design of Piston Compressors" formulated by the Ministry's Architectural Design Technology Center and relevant design institutes have been reviewed and approved as chemical industry standards (see the attached table for details of the numbers). They will be implemented from October 1, 1994. The Ministry's Architectural Design Technology Center is responsible for the management of these six standards; the Ministry's Engineering Construction Standards Editing Center is responsible for publishing and distributing them. Ministry of Chemical Industry
April 12, 1994
Appendix: Numbers of six chemical industry standards for architectural designStandard Name
Design regulations for piston compressor foundation
Design regulations for centrifugal compressor foundation
General drawing of reinforced concrete truss pipe rack
General drawing of steel deck
Architectural design regulations for control rooms in chemical plants
Design calculation book format regulations for masonry structure
Editor-in-chief
|The First Design Institute of the Ministry of Chemical Industry
Jilin Chemical Company Design Institute
Shanghai Pharmaceutical Design Institute
China Global Chemical Engineering Corporation
Sinopec Lanzhou Petrochemical
Design Institute
China Global Chemical Engineering CorporationwwW.bzxz.Net
Standard No.
HG20554-93
HG20555-93
HG21552-93
HG21553-93
HG20556-93
HG21555-93||tt ||2. Main symbols
Basic provisions
3.1 General provisions
3.2 Design principles
Original design data
4.1 Technical data of compressor units
4.2 Technical requirements for design
4.3 Technical data for engineering geology
Construction requirements
General requirements
Construction requirements
Reinforcement requirements
Vibration calculation
Strength verification
Appendix A
Appendix B
Appendix C||tt| |Appendix D
General provisions
Loads and load combinations
Strength verification
Calculation of multi-degree-of-freedom systems.
Example of centrifugal compressor foundation design
General requirements for compressor foundation construction
Terms used in this regulation
Article explanation
(8)
1 General provisions
1.0.1 In order to implement the national technical and economic policies in the design of centrifugal compressor rigid frame foundations, to achieve advanced technology, economic rationality, safety and applicability, and to ensure quality, these regulations are specially formulated.
1.0.2 These regulations are applicable to the design of centrifugal compressor rigid frame foundations (hereinafter referred to as compressor foundations) with an operating speed n greater than 3000r/min. The design of machine foundations with similar working conditions and structural forms can also be used as a reference. 1.0.3 The design of the compressor foundation shall comprehensively consider the engineering geological conditions, machine layout and dynamic characteristics, as well as the technical requirements of the compressor foundation for production and process, and shall be carefully designed to ensure the structural strength, limit the vibration within the allowable range, and avoid inappropriate settlement and tilt.
1.0.4 This regulation is formulated based on the basic principles stipulated in the national standard "Uniform Standard for Design of Building Structures" (GBJ68-84). The symbols, measurement units and basic terms shall comply with the provisions of the national standard "General Symbols, Measurement Units and Basic Terms for Design of Building Structures" (GBJ83-85). ·1.0.5 When designing according to this regulation, the relevant specifications and standards such as the national standard "Code for Loads on Building Structures" (GBJ9-87), "Code for Design of Building Foundations" (GBJ7-89) ~ "Code for Design of Concrete Structures" (GBJ10-89) shall also be observed. 2
Main symbols
Working speed of the machine, r/min;
Calculated disturbance force of the machine, kN:
[Vrma]-
Vertical calculated disturbance force of the machine, kN,
Transverse calculated disturbance force of the machine, kN;
Longitudinal calculated disturbance force of the machine, kN
Self-weight of the machine rotor, kN
Self-weight of the upper parametric part of the basis set, kN
Lower part of the basis set Self-weight of the fixed part, kN,
vibration velocity value of the control point on the top surface of the foundation, mm/s; root mean square value of the velocity of the control point on the top surface of the foundation, mm/s allowable vibration velocity of the top surface of the foundation, mm/s allowable root mean square value of the velocity of the top surface of the foundation, mm/s vertical equivalent static load, kN;
lateral equivalent static load, kN
N, longitudinal equivalent static load, kN;
- power of the motor, kW
M. Short-circuit torque of the motor, kN·m
P. Short-circuit force of the motor, kN
- design value of foundation bearing capacity, kPa
f—standard value of foundation bearing capacity, kPa;
p—design value of the average static pressure on the bottom surface of the foundation, kPaαdynamic reduction coefficient of foundation bearing capacity;——dynamic coefficient.
3 Basic regulations
3.1 General regulations
3.1.1 The compressor foundation should be designed as a reinforced concrete space rigid frame structure consisting of a bottom plate, columns, and top plates (or longitudinal and transverse beams). The top plate should have sufficient mass and rigidity. On the premise of meeting the strength and stability requirements, the column cross-section size should be minimized to increase the flexibility of the column. The size of the bottom plate should be determined according to the structural requirements and the properties of the foundation soil, and sufficient rigidity must be ensured.
3.1.2 The compressor foundation should adopt a cast-in-place reinforced concrete structure. The concrete strength grade should not be lower than C25, and the material strength grade of the secondary grouting layer should not be lower than the foundation material strength grade. The steel bars should be I and I grade hot-rolled steel bars, and cold-processed steel bars should not be used. 3.1.3 The compressor foundation should be set on a uniform medium- and low-compressibility foundation soil. When there is a thick soft soil layer (such as silt, silty soil, fill and other highly compressible soil, etc.) or collapsible loess, expansive soil, etc. in the underlying layer of the foundation, as well as adverse geological phenomena such as karst caves and ancient tombs, effective treatment measures should be taken for the foundation. 3.1.4 The total center of gravity of the foundation group (including the compressor foundation and the machinery, pipelines, auxiliary equipment and fill on the foundation) and the centroid of the bottom surface of the compressor foundation should be located on the same vertical 5
line. When eccentricity is unavoidable, the longitudinal and transverse eccentricities should not exceed 3% of the length of the bottom plate in the corresponding direction. When calculating the total center of gravity of the foundation group, only the permanent load is calculated, and the load sub-item system may not be considered. 3.1.5 Permanent settlement observation points should be set on the compressor foundation. The location of the settlement observation points should be convenient for observation. Generally, one observation point should be set in each of the two directions of the corner column; if the compressor foundation is long, 1 to 2 observation points can be added on the longitudinal middle column. 3.1.6 The settlement observation of the compressor foundation should be clearly stated in the engineering design description, and carried out in the following stages, and observation records should be made. (1) After the construction of the compressor foundation is completed, an observation should be made; (2) After the compressor unit is installed, an observation should be made; (3) During the trial operation, an observation should be made every half a month to a month; (4) After the production is put into operation, an observation should be made every six months: During the production process, if any problems are found, observations should be made at any time. 3.1.7 When a piston compressor or other low-frequency vibration machine is installed in the factory and works at the same time as a centrifugal compressor, the layout of the machine should take into account the adverse effects of the piston compressor foundation or other low-frequency machine foundation vibration on the centrifugal compressor foundation. 3.1.8·If the vibration of the compressor foundation has a harmful effect on nearby personnel, precision equipment, instruments and process production, reasonable plane layout and effective vibration isolation measures should be taken.
3.1.9 If the pipes connected to the compressor vibrate greatly, they should not be rigidly fixed on the compressor foundation and the building. Instead, vibration reduction measures such as spring supports or hangers should be adopted. 3.1.10 The bottom surface of the compressor foundation and the bottom surface of the adjacent structure or building foundation should be placed at the same elevation and should not be connected. When the compressor foundation must be connected to the structure or building foundation, it must be carefully designed and can only be connected after confirming that the vibration of the compressor foundation has no adverse effect on the structure or building. 3.1.11 The compressor foundation should be separated from the plant operation platform. If the beams or decks of the steel operation platform on both sides of the compressor must be supported on the compressor foundation, the connection between the beam and the compressor foundation should be designed to be slidable along the longitudinal direction of the beam, and the deck should be freely placed on the compressor foundation.
3.1.12 For the compressor foundation built in an earthquake zone with a seismic fortification intensity equal to or less than 8 degrees, the earthquake effect can be ignored, but it should comply with the structural requirements of 5.3.7 of this regulation. 3.2 Design principles
3.2.1 According to the requirements of the ultimate limit state of bearing capacity and the limit state of normal use, the compressor foundation is generally verified by the following calculations. If the structural requirements are met, some calculations may not be performed.
(1) Strength verification: including frame strength verification and foundation strength verification. (2) Deformation verification: only the settlement deformation of the foundation is calculated. (3) Vibration verification.
3.2.2 The strength verification of the compressor foundation is in accordance with the provisions of Chapter 7. At this time, the safety level of the structure is level 1, and the importance coefficient of the structural components is taken as 1.1. 3.2.3 The settlement deformation of the compressor foundation is calculated in accordance with the provisions of the current "Code for Design of Building Foundations". The allowable settlement value is 60mm, and the allowable inclination value in the direction of the compressor axis is 1/1000 (except when there are special requirements). When the foundation soil is uniform and the design value of the average static pressure on the bottom of the foundation is less than half of the design value of the foundation bearing capacity, the settlement verification may not be performed. 3.2.4 Vibration verification of compressor foundation According to the provisions of Chapter 6 of these Regulations, the peak value of vibration velocity at the control point on the top surface of the compressor foundation shall not exceed 5mm/s (except when there are special requirements).
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