JB/T 4740-1997 Types and basic parameters of air-cooled heat exchangers
Some standard content:
Industry Standard of the People's Republic of China
JB/T4740-1997
Type and basic parameters of air cooled heat exchanger
Published on 1997-07-18
Ministry of Machinery Industry of the People's Republic of China
Ministry of Chemical Industry of the People's Republic of China
Ministry of Labor of the People's Republic of China
China Petrochemical Corporation
1997-12-01
China Petrochemical Corporation
Sinopec [1997] Consultation No. 406
Notice on Issuing the Industry Standard "Type and Basic Parameters of Air Cooled Heat Exchanger"
To all relevant units:
The recommended industry standard "Type and Basic Parameters of Air Cooled Heat Exchanger" is hereby issued and will be implemented from December 1, 1997.
The name and number of the standard are as follows:
JB/T4740—1997 Types and basic parameters of air-cooled heat exchangers (replacing JB1415--84 Types and basic parameters of air coolers)
In order to implement this standard in a timely manner, its publication and distribution work is organized and completed by the National Technical Committee for Standardization of Pressure Vessels.
July 18, 1997
Keywords: Industry Standard
Copy: State Bureau of Technical Supervision
General Office of China Petrochemical Corporation
Printed on August 12, 1997
This standard is a revision of JB1415-84 (Types and Basic Parameters of Air Coolers) based on GB/T15386-94 (Air Cooling Heat Exchangers).
When revising JB1415-84 based on GB/T15386-94, the two types of wet air coolers and combined air coolers in JB1415-84 were deleted, and the basic parameters of air cooling heat exchangers were expanded and modified based on the current development status and trend of air cooling heat exchangers in my country, and the basic parameters of air cooling heat exchangers in JB1415-84 were retained. The effective clauses. Compared with JB1415-84, this standard adds the following contents: - Chapter 2 Reference standards
- Chapter 3 Definitions
This standard will replace JB1415-84 from the date of its entry into force. This standard is proposed by the National Technical Committee for Standardization of Pressure Vessels. This standard is under the jurisdiction of the Heat Exchange Equipment Subcommittee of the National Technical Committee for Standardization of Pressure Vessels. This standard was drafted by the Lanzhou Petroleum Machinery Research Institute of the Ministry of Machinery Industry. Han Lansheng Liu Yanyu
Jiang Xuejun
The main drafters of this standard are heavy
Reference standards
Composition and type
Structure
Shutters
Industry standards of the People's Republic of China
Type and basic parameters of air cooled heat exchangers
exchangerJB/T4740-1997
Replaces JB1415-84
This standard specifies the types and nominal dimensions and basic parameters of components such as tube bundles, frames, fans, and shutters of forced draft and induced draft air-cooled heat exchangers (hereinafter referred to as "air coolers"). This standard applies to air coolers for the petroleum and chemical industries, and also to similar air coolers in other industrial sectors. 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of the standard, the versions shown are valid. All standards are subject to revision, and parties using this standard should Explore the possibility of using the latest versions of the following standards. GB/T1538694 Air-cooled heat exchanger
3 Definitions
This standard adopts the following definitions.
3.1 Curvature ratio
refers to the ratio of the total surface area of the finned tube per unit length to the surface area of its base tube. 3.2 Ratio of the windward area of the tube bundle
refers to the ratio of the narrowest net cross-sectional area of the air flow of the tube bundle to the windward area of the tube bundle. .4 Composition and type
4.1 Composition
The air cooler consists of a tube bundle, a frame, a fan and a shutter. 4.2 Type
The air cooler type is divided into horizontal type and oblique type. The ventilation mode of the air cooler is divided into forced draft type and induced draft type. See Figure 1. 4.3 The model representation method and the name of the parts shall comply with the provisions of GB/T15386. 5 Tube bundle
5.1 Type
: 5.1.1 Horizontal tube bundle, see Figure 2(a). Blower-type horizontal tube bundle (code CP);
Induced-draft horizontal tube bundle (code YP).
Sloped-top tube bundle (code x), see Figure 2(b). Machine
China Petrochemical Corporation
1997-07-18 Approved
1 Implementation
19971201
1. Louver
JB/T4740-1997
(a) Blower-type horizontal air cooler
(b) Induced-draft horizontal air cooler
(c) Blower-type inclined-top air cooler
JB/T4740 1997
(a) Horizontal tube bundle
(b) Inclined top tube bundle
5.2 Nominal pressure PN
1.0, 1.6, 2.5, 4.0MPao
5.3 Nominal width BN
JB/T4740-1997
500, 750, 1000, 1250, 1500, 1750, 2000, 2250, 2500, 2750, 3000mm5.4 Actual width SN
Refers to the distance between the outer edges of the beams on both sides of the tube bundle. 5.5 Finned tube
See Figure 3 for the symbols of finned tube parameters.
(a) L-type fin tube (code L)
(b) Double L-type fin tube (code LL)
(d) Bimetallic rolled fin tube (code DR) Figure 3
(c) Knurled fin tube (code KL)bzxZ.net
(e) Mosaic fin tube (code G)
Main characteristic parameters and arrangement of fin tubes
Fin height h: 12.5, 16mm.
JB/T4740-1997
Fin tube length L: 3000, 4500, 6000, 9000, 10500, 12000mm See Table 1 for the characteristic parameters and arrangement of fin tubes. Table 1
Base tube outer diameter d
Fin outer diameter D
Nominal thickness of through sheet S
L, LL, KL, G
Super sheet height h
Number of fins/m
The finning ratio of finned tubes and the windward area ratio of tube bundles are shown in Table 2. Table 2
Finning ratio
Type of finned tube
Number of fins/m
Through fin height
Finning ratio
DR type finned tube
Thickness of composite layer S
Through fin height
h=16mm
Arrangement of finned tube
Distance between tube centers
Ratio of windward area
Type of finned tube
Number of fins/m
Number of tube rows Z
Finning ratio
Fin height
Horizontal tube bundle: 4, 5, 6, 8 rows.
Sloped top tube bundle: 3, 4 rows.
Number of tube passes N
1, 2, 3, 4, 5, 6, 8.
JB/T4740-1997
Table 2 (end)
Windward side
The basic parameter combination of horizontal tube bundle is shown in Table 3. 5.8
Nominal width
Number of tube rows Z
Number of tube passes N
1, 2, 4
1, 23
1, 2, 4
1, 2, 5
1, 2, 3
1, 2, 4
1, 2, 5
1, 2, 3
1, 2, 4
1, 2, 5
1, 2, 3
1, 2, 4
1, 2, 4
1, 2, 3
1, 2, 4
1, 2, 4
1, 2, 5
1, 2, 3.6
1.2, 4, 8
Finning ratio
Fin height
h=16mm
Fin tube length L
Windward area ratio
Nominal width
5.9 pipe box
number of pipe rows
number of pipe passes N
1, 2, 4
1, 2, 5
1, 2, 3 , 6
1, 2, 4, 8
1, 2, 4
1, 2, 5
1, 2, 3, 6||tt| |1, 2, 4, 8
1, 2, 4||tt| |1, 2, 5
1, 2, 3.6
1, 2, 4, 8
1, 2, 4
12, 5||tt| |1, 2, 3, 6
1, 2, 4, 8
1, 2, 4
1, 2, 5
1, 2, 4 、8
Pipe box type see GB/T15386.
Connecting flange
Flange standard: according to the drawing requirements.
JB/T47401997
Table 3(End)
Flange sealing surface types: convex surface, concave-convex surface, rod groove surface. 4500
Length of radiographic tube L
Nominal diameter of connecting tube DN: 50, 80, 100, 150, 200, 250, 300 mm. The number and position of connecting tubes are shown in Table 4 and Figure 4. Table 4| |tt||Nominal width BN
By number of pipes
Connection spacing b
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.