This standard storage tank is suitable for storing volatile petroleum, petroleum products and chemical products. HG 21502.2-1992 Steel Vertical Cylindrical Internal Floating Roof Storage Tank Series HG21502.2-1992 Standard download decompression password: www.bzxz.net

Industry Standard of the People's Republic of China
Steel Vertical Cylindrical Internal Floating Roof Storage Tank Series HG 21502. 2-92
Editor: The Sixth 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
Specifications to be followed in design and manufacturing
SH3046-92 "Design Specifications for Vertical Circular Simple Steel Welded Storage Tanks"; GBI128-90 "Construction and Acceptance Specifications for Vertical Cylindrical Steel Welded Oil Tanks"; GBI236-82 "Construction and Acceptance Specifications for Field Equipment and Industrial Pipeline Welding Projects";
SHJ26-90. "Standard for Seismic Assessment of Atmospheric Pressure Vertical Storage Tanks". 33
General Provisions
Applicable Scope
This standard storage tank is suitable for storing volatile petroleum, petroleum products and chemical products. Working Conditions
Pressure: okPa;
Temperature: +80℃.
Storage Liquid Density: 01000kg/m2
Structural Type
This standard storage tank is a steel vertical circular simple internal floating storage tank. 2.3
Specifications and Dimensions
Nominal Volume: 100m2～30000m2;
Nominal Diameter:
DN4500mm~DN44000mm.
Design pressure:
Design temperature:
Corrosion margin:
Design load
Design temperature
-1980℃
Basic wind pressure: 0.5kPa.
Snow load: 0.45kPa.
Additional load on tank item:
Seismic fortification intensity: 7 degrees.
2.4.5 Material selection
The material selection should be based on the lowest daily average temperature of the tank construction area plus 13℃ to determine the tank wall material (Q235-AF: Q235-A20R: 16Mn16MnR). The specific selection principle is based on Table 2.4.5.
Q235-A
Application range of steel plate
GB3274
GB6654
GB1591
GB3274
GB6654
Application range
Metal allowable
Minimum temperature
Maximum allowable
Thickness
Mechanical properties
Inspection items
ObvOs,os
ObDgvOg
AkyCold bending
OnOs,05
OhCsos
AkvCold bending
Note: ①16MnR steel plate with thickness greater than 30mm should be delivered in normalized state. Note
② 20R with a thickness greater than 30mm and 16MnR with a thickness greater than 30mm shall be subjected to ultrasonic flaw detection one by one to meet the requirements of ZBI74003-88 "Ultrasonic flaw detection of pressure vessel steel plates" and comply with the grade requirements of "Ultrasonic flaw detection of pressure vessel steel plates". 36
2.4.6 Allowable stress
The allowable stress of steel plates shall be based on Table 2.4.6.
Allowable stress value of steel plate
Q235-A
6～16
17～25
Strength index at room temperature
(MPa)/o, (MPa)
Allowable stress at the following temperature (℃)
(MPa)
Atmospheric temperature
The number, specifications and uses of the nozzles set in this standard are recommended and can be changed according to process requirements and indicated in the selection table. The specifications of the tank pipe and the pipe extension length are shown in Figure 2.5 and Table 2.5.37
Figure 2.5 Schematic diagram of storage misconnection
Storage pipe length dimension table
Pipe specifications
Φ18×3
Φ32×5
@45×5
@57×5
$89×6
Weight108×6
@159×7
Φ219×8
Φ273×9
@325X10
Φ377×11
Pipe extension length
The pipe flange adopts a raised plate type flat welding flange with a nominal pressure of PN0.6MPa. The flange standard is HGI44-91 (except for the instrument interface). The foam fire fighting and water sprinkler system adopts a raised plate type flat welded steel pipe flange, with a nominal pressure of PN-1MPa, and the flange standard is GB9119.7-88. 2.7
Liquid level indication
This standard storage tank is equipped with two sets of liquid level indication devices, one is a float type steel belt level gauge, and the other is a differential pressure level gauge.
2.8 Ladder, platform
This standard stipulates that 100m2~300m2 storage tanks use straight ladders, and 400m2~30000m storage tanks use spiral ladders, with a spiral rise angle of 45°. 39
2.9.1 Foam fire fighting
Fire fighting facilities
This standard adopts foam fire fighting for storage tanks. Different numbers of air foam generators are set according to different volumes.
2.9.2 Fire sprinkler
For storage tanks that need to be equipped with water sprinklers, this standard stipulates that storage tanks of 100m2 to 800m2 are only equipped with tank top sprinklers, and storage tanks of 1000m2 to 30000m2 are equipped with water sprinklers on the tank top and tank wall. See Table 2.9.2 for details.2.10
2.10.1 Floating plate structure
Internal floating roof structure
This standard adopts two structural types: shallow plate type and cabin type. Storage tanks with a nominal volume less than 10000m2 adopt shallow plate type, and storage tanks with a nominal volume equal to or greater than 10000m2 adopt cabin type.
Sealing structure type
This standard adopts two structural types: packing seal and tongue seal. Storage tanks with a nominal volume less than 10,000m2 use packing seals, and storage tanks with a nominal volume equal to and greater than 10,000m2 use tongue seals.
For the rubber element of the sealing device, this standard recommends the use of nitrile rubber. In addition, fluororubber and glass cloth impregnated with polytetrafluoroethylene can also be used according to the storage medium, and it should be noted in the selection table.
tank wall spray
tank top spray
feeding port, discharging port
water inlet
water inlet
steel strip liquid
10m~30000m internal floating roof storage tank series pipe orifice specifications and uses
air foam
fire foam
light hole, air hole, oil measuring hole
level meter port
ei/ez3
foam population| |tt||Tank top
Wall manhole
Pressure differential liquid
Surface gauge port
Pressure differential liquid
Sewage outlet temperature gauge port
Surface gauge port
Standard serial number
21502.2-92-101
2-92-102
2-92-103
21502.2-92-104
21502. 2-92-105
21502.2-92-106
21502.2-92-107
21502. 2-92-108 | | tt | | 21502.2-92-109 | tt||21502.2-92-115
21502.2-92-116
.2-92-117
21502.2-92-118
2.2- 92-119
21502.2-92
21502:2-92-121
.2-92-126
21502.2-92
-2-92-
2-92-129
21502.2-92-130
21502.2-92-
2.10.3 Support height of internal floating roof
The internal floating roof of this standard has two support heights: operation and maintenance. The operation height is 900mm and the maintenance height is 1800mm.
2.10.4 Guide mechanism (anti-rotation device)
The guide device of the floating plate of this standard adopts a sliding guide device. 2.11. Wall reinforcement ring
This standard stipulates that the tank with a nominal volume less than 1000m2 shall not be equipped with reinforcement ring, and the tank with a nominal volume equal to or greater than 1000m2 shall be equipped with reinforcement ring. Tank bottom plate structure
This standard recommends that the tank bottom plate adopts two types of butt joint and overlap, and it shall be selected according to the actual situation of the foundation and indicated in the selection table. 2.13
Drainage outletbZxz.net
This standard recommends that the tank adopts two drainage structure types: tank bottom drainage and cleaning hole. And it shall be selected according to the characteristics of the storage medium and indicated in the selection table (drainage hole S1, cleaning hole Sz).
Additional requirements
2.14.1 The fire sprinkler device set in this standard can be selected or modified according to the process requirements.
2.14.2 According to the characteristics of the storage medium, if there is a requirement for anti-corrosion treatment of the tank bottom plate, it can be proposed in the selection table and clarified.
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