This standard specifies the type, size and technical requirements for reinforcing rings used to reinforce openings in steel pressure vessel shells. JB/T 4736-2002 Heads for steel pressure vessels with reinforced rings JB/T4736-2002 Standard download and decompression password: www.bzxz.net

Industry Standards of the People's Republic of China
JB/T 4736--2002
JB/T 4746--2002
Reinforcement Ring
Head for Steel Pressure Vessels|| tt||Reinforcing pad
Formed heads for steel pressure vessels2002-08-22 release
2003-03-01 implementation
National Economic and Trade Commission release
Announcement|| tt||No. 61 of 2002
Published 6 Pressure Vessel Industry Standards
The State Economic and Trade Commission approved 6 Pressure Vessel Industry Standards, which are hereby announced as of March 1, 2003 implementation.
The above standards are published and distributed by the National Pressure Vessel Standardization Technical Committee. Attachment: Names and numbers of 6 pressure vessel industry standards National Economic and Trade Commission of the People's Republic of China August 22, 2002
Attachment:
Serial number
2|| tt||3
6 pressure vessel industry standard names and numbers Standard names
Aluminum welded vessels
Reinforcement rings
Titanium welded vessels||tt| |Heads for steel pressure vessels
Steel welding rod ordering technology for pressure vessels
Technical conditions
Nickel and nickel-based alloys for pressure vessels
Explosive composite steel plates|| tt||Standard number
JB/T 4734-2002
JB/T 47362002
JB/T 47452002
JB/T 4746-2002
JB/T4747—2002
JB/T 4748—2002
replaces the standard number
JB/T 4736—1995
JB/T4729—1994
JB/T 4737---1995
JB/T 4738—1995
JB/T 4739—1995
JB 576—1964
JB/T4736—2002
Strengthening ring for socks
JB/T4736-2002 "Reinforcement ring" standard interpretation·JB/T4746--2002 Sealing head for steel pressure vessels
JB/T4746-2002《 "Heads for Steel Pressure Vessels" Standard Interpretation? Record
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71
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JB/T 4736--2002|| tt||Reinforcement Circle
JB
Industry Standard of the People's Republic of China
JB/T 4736--2002
Replaces JB/T4736—1995
Reinforcing circle
Reinforcing pad
2002-08~22 release
2003-03-01 implementation
National Economic and Trade Commission release
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ForewordWww.bzxZ.net
Scope
2
Normative documents
Symbols
3
4|| tt||Type size
Technical requirements
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Mark
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month
times
Appendix A ( Informative appendix) Welding joint types and application scope of various grooves JB/T4736—2002
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Previous
Preface
This standard replaces JB/T4736-1995 "Reinforcement Circle" from the date of promulgation 》. Compared with JB/T4736--1995, the main difference between this standard and JB/T4736-1995 is: JB/T 4736-2002
-JB/T4736-1995 stipulates that the reinforcing ring can only be manufactured from the whole plate. This standard adds It stipulates that the reinforcing ring can be manufactured by radial block splicing, and the non-destructive testing requirements and qualification level requirements for the splicing welds of the reinforcing ring have been added accordingly; - Some welded joints of the reinforcing ring have been added to Appendix A of this standard Type; change the requirement in JB/T4736--1995 that "the thickness of the reinforcing ring should be no greater than the nominal thickness of the shell opening" to "the thickness of the reinforcing ring should be no greater than 1.5 times the nominal thickness of the shell opening" ". This standard specifies the requirements for manufacturing, inspection and acceptance of reinforced rings, but the materials and design calculations of reinforced rings should comply with the relevant provisions of GB150-1998 "Steel Pressure Vessels". Appendix A of this standard is an informative appendix.
This standard is proposed by the National Pressure Vessel Standardization Technical Committee. This standard was approved by the National Economic and Trade Commission. This standard is under the jurisdiction of the Manufacturing Subcommittee and Design Subcommittee of the National Pressure Vessel Standardization Technical Committee. This standard was drafted by Hefei General Machinery Research Institute. The main drafter of this standard: Cui Jun.
This standard is interpreted by the National Pressure Vessel Standardization Technical Committee. r

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1 Scope
Reinforcing ring
1.1 This standard specifies the requirements of the reinforcing ring used to reinforce the opening of the steel pressure vessel shell. Type, size and technical requirements. JB/T 47362002
1.2 This standard is used when the shell opening of a steel pressure vessel is reinforced with a reinforcing ring structure, and the following conditions should be met at the same time: a) The design pressure of the vessel is less than 6.4MPa; ||tt| |b) The design temperature of the vessel is not greater than 350°C; the nominal thickness of the opening of the vessel shell is ≤38mm; c)
d) The lower limit of the standard tensile strength of the vessel shell steel is not greater than 540MPa; e) Supplement The thickness of the strong ring should not be greater than 1.5 times the nominal thickness of the shell opening. 1.3 This standard is not recommended for containers made of chromium-molybdenum steel, nor is it recommended for containers containing extremely toxic and highly hazardous media. 1.4 This standard does not apply to vessels subjected to fatigue loads. 2 Normative reference documents
The provisions in the following documents become provisions of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrigenda) or revisions do not apply to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. . For undated referenced documents, the latest edition applies to this standard. GB150—1998 Steel pressure vessels
GB/T197—1981 Ordinary thread tolerances and fits GB/T1804—2000 General tolerances Tolerances of linear and angular dimensions without tolerances noted JB4708—2000 Welding of steel pressure vessels Process evaluation JB4730—1994 Non-destructive testing of pressure vessels 3 symbols
-inner diameter of reinforcing ring, mm;
D
Dz-outer diameter of reinforcing ring, mm;
dn-Nominal diameter of nozzle, mm;
d. Nozzle outer diameter, mm;
3. Thickness of reinforcing ring, mm;
?, nominal thickness of shell opening, mm;
?m - nominal thickness of nozzle, mm.
4 Types and sizes
4.1 Groove type
According to the requirements of the reinforcement ring welded joint structure, the reinforcement ring grooves are divided into five categories: A, B, C, D and E type, as shown in Figure 1. In addition to the diagram type, the designer can design the groove type by himself according to the structural requirements.
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