HG/T 20517-1992 Steel Low Pressure Wet Gas Holder HG/T20517-1992 Standard download decompression password: www.bzxz.net

Industry Standard of the People's Republic of China
HG 20517-92
Steel Low-Pressure Wet Gas Holder
1992-07-27
1992-12-01
Ministry of Chemical Industry of the People's Republic of China
Industry Standard of the People's Republic of China
Steel Low-Pressure Wet Gas Holder
HG 20517-92
Editor: The Third Design Institute of the Ministry of Chemical Industry
Approval Department: Ministry of Chemical Industry
Engineering Construction Standard Editing Center of the Ministry of Chemical Industry
1992．Beijing
Revision NotesbzxZ.net
According to the requirements of the Ministry of Chemical Industry's Infrastructure Construction Department (89) Chemical Basic Standard No. 77, our station organized the compilation of design standards and technical regulations for chemical equipment design as a ministerial directive technical document guiding equipment design and manufacturing. "Steel Low-pressure Wet Gasholder" (HG20517-92) is revised on the basis of "Technical Regulations for the Design of Steel Low-pressure Wet Gasholder" (CD130A6-86) issued by the former Infrastructure Bureau of the Ministry of Chemical Industry. Some corrections and supplements have been made to the relevant parameters, structural design, calculation, construction and inspection of the gasholder.
This standard is edited by Fan Yimin, verified by Kong Fanchen, and reviewed by Xu Yizheng of the Third Design Institute of the Ministry of Chemical Industry. During the preparation process, this standard has been extensively investigated and studied, summarizing the design and practical experience of various design units over the years. After soliciting opinions and review by the technical committee members and consultants of the central station, it was finalized and submitted to the Ministry for approval by the Equipment Design Technology Center of the Ministry of Chemical Industry. From the effective date, the original CD130A6-86 will be abolished accordingly. In the process of implementing this standard, if any units find that there is a need for modification or supplementation, please provide your opinions and relevant information to the Equipment Design Technology Center of the Ministry of Chemical Industry for reference in future revisions. Equipment Design Technology Center of Ministry of Chemical Industry
September 1991
4 Allowable stress, weld coefficient, allowable slenderness ratio, wall thickness addition5
General provisions
6 Sink bottom plate design
Sink wall design·
8 Bell top design
Movable tower section wall plate design.
Water seal hanging ring design
Mobile tower section bottom ring design
Guide rail wheel pressure calculation and guide rail design
Guide wheel design
Inner column design of mobile tower section
Seismic design of gas cabinet
Counterweight design and calculation
Reinforcement of pipes, manholes and openings·
Water tank overflow device·
Ladder, platform, railing
Water collection tank and flush cleaning hole
Anti-corrosion design
Key points of accessory design
Key points of construction and acceptance
Appendix A Calculated outdoor temperature of air conditioning in winter in some areas of ChinaAppendix B
Basic wind pressure value in some areas of my country
Appendix C Basic snow pressure value in some areas of my country||tt| |Appendix D
Appendix E
Calculation of edge stress of bell cover top ring (reference) Formula for rainstorm intensity in several cities in my country
Appendix F Selection table of anti-corrosion coating for gas tank (reference) ·Appendix G
Calculation of wall thickness of movable tower section according to body coefficient of surface distribution of wind load (reference) ·Appendix H
Overall stability verification of spherical arch frame at bell cover top (reference) Stability coefficient of compression member
Appendix 1
Preparation instructions
（1）
1 General
1.1 Scope of application
1.1.1 This standard applies to the design of steel welded wet gas storage tanks (referred to as gas tanks) 1.1.2 This standard applies to the design of wet gas tanks with a design pressure of less than 4000Pa. 1.1.3 This standard applies to the design of gas tanks with a nominal volume of 50m2 to 100000m2. 1.1.4 This standard applies to the design of gasholders used for storage, buffering, pressure stabilization, mixing, etc. of chemical and petrochemical gases. 1.1.5 This standard only applies to the design, manufacture, and acceptance of the gasholder body and the accessories specified in this standard, and does not apply to the design of gasholder parts made of non-metallic materials (such as concrete, masonry above-ground and underground water tanks). 1.2 Standard Specifications
1.2.1 The design, construction, and acceptance of gasholders not specified in this standard shall comply with the following standards and specifications (the latest version shall prevail):
1.2.1.1 "Steel Structure Design Code" (GBJ17). 1.2.1.2 "Metal Welded Structure Condensing Gasholder Construction and Acceptance Code" (HGJ212). 1.2.1.3 "On-site Equipment, Industrial Pipeline Welding Engineering Construction and Acceptance Code" (GBJ236). 1.2.1.4 "Ultrasonic testing of butt welds of boilers and steel pressure vessels" (JB1152) 1.2:1.5 "Radiography and quality classification of steel fusion welded butt joints" (GB3323). When the design must refer to the current foreign specifications, the selection of various parameters shall comply with the relevant provisions of the referenced specifications, and if necessary, additional requirements shall be indicated in the design documents. 1.3
Classification and definition of terms
“1.3.1 Classification by rail form
1.3.1.1 Spiral gas cabinet: a gas cabinet with spiral rails. 1.3.1.2 External guide frame vertical rise gas cabinet: a gas cabinet with straight rails with external guide frames. 1.3.1.3 Vertical rise gas cabinet without external guide frame: a gas cabinet with straight rails welded to the wall of the movable tower. 1.3.2 Classification by the number of movable tower sections
A gas cabinet is composed of a water tank and movable tower sections (or towers for short). A gas cabinet with only one movable tower section is called a single-section gas cabinet . A gas cabinet with two or more movable tower sections is called a multi-section gas cabinet. The names of the movable tower sections are called bell (or simply tower one), middle section I (or simply tower two), middle section caliper (or simply tower three), etc. in the order of rising. 1.3.3 The plate thickness referred to in this standard is nominal thickness (including plate thickness addition) unless otherwise specified. 2 Load
2.1 Design pressure
2.1.1 The design pressure of the gas cabinet is equal to the working pressure of the gas cabinet. 2.1.2 The working pressure of the gas cabinet is equal to the maximum gas pressure when the gas cabinet is working, that is, the movable pressure of the gas cabinet. The gas pressure when the node is fully raised to the maximum height.
2.1.3 The design pressure of the water tank is equal to the static pressure of the liquid column from the calculated location to the overflow surface of the water tank. 2.2 Wind load
2.2.1 The basic wind pressure of the region shall refer to the "National Basic Wind Pressure Distribution Map" in the "Code for Loads on Building Structures" (GBJ9) or Appendix B of this standard, and shall be determined in the engineering design system regulations. 2.2.2 Calculate the wind pressure according to formula (2-1): W-BKKW.
Where: W. The basic wind pressure value of the region, N/m2. β-—Wind vibration coefficient, according to the wind load The cabinet self-vibration period T is determined. The measured self-vibration period T is about 0.35~0.60s, generally T-0.5s, and the wind vibration coefficient β-1.45. K,——wind pressure height coefficient, selected according to Table 2.2.2-1, the intermediate value can be obtained by interpolation. K is a shape coefficient, K-0.7 when the tower body is calculated as a whole; when the tower body is calculated locally, refer to Figure 2.22-1 and select the K value according to Table 2.2.2-2.
Height variation coefficient
Height from the ground
Tower wind load shape coefficient graph
Figure 2. 2. 2-1
Table 2. 2.2-1
Local calculation of bell cover top plate f/d
cosp (symbols see Figure 2.2.2-2)
Figure 2.2.2-2 Wind load type coefficient diagram of bell cover top. 2.3 Snow load
Table 2.2.2-2
2.3.1 The basic snow pressure in the region shall be determined in accordance with the "National Basic Snow Pressure Distribution Map" in the "Code for Loads on Building Structures" (GBJ9) or Appendix C of this standard, and in the unified regulations for engineering design. 2.3.2 The calculated snow load on the horizontal projection surface of the bell cover shall be calculated according to formula (2-2): S=CS
Where: S. ---Basic required pressure in the area, N/m\; C
-Snow distribution coefficient on the top of the bell hood, take C-1 in the snowy area, and calculate the uniform snow on the plane according to 3.424#
Figure 2.3.2 Snow distribution diagram on the top of the bell hood
2.4 Live load
page, see Figure 2.3.2. 2.4.1 The construction load on the horizontal projection surface of the bell hood and its supporting structure is 687N/m. 3
2.4.2 The uniform live load on the platform and walkway is generally not less than 2453N/m2. 2.4.3 Each step of the escalator should be able to withstand a concentrated live load of 1470N. 2.4.4 The railing structure should be able to withstand a live load of 883N in any direction at any point on the top of the handrail. 2.5 Dead load
2.5.1 The dead load includes the dead weight of the gas tank body, the weight of the upper and lower counterweights, the weight of the water in the water seal ring, and the static pressure of the water in the water tank. 2.5.2 When calculating the strength, the gravity of the relevant parts of the bell jar can be approximately taken as the following values: Bell jar top plate: When the plate thickness a=3mm, W.l=235N/m2When the plate thickness a=4mm, W-314N/m2
Ribbed shell (plate thickness a=4mm) W=392N/m2Bell top arch: When the bell diameter D≤30m, Ws2~206N/m2, 30
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