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GB/T 25198-2023: Heads for pressure vessels
Status: Valid GB/T 25198: Evolution and historical versions
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Heads for pressure vessels
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Basic data | Standard ID | GB/T 25198-2023 (GB/T25198-2023) | | Description (Translated English) | Heads for pressure vessels | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J74 | | Classification of International Standard | 23.020.30 | | Word Count Estimation | 84,866 | | Date of Issue | 2023-08-06 | | Date of Implementation | 2024-03-01 | | Older Standard (superseded by this standard) | GB/T 25198-2010 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 25198-2023: Heads for pressure vessels---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 23.020.30
CCSJ74
National Standards of People's Republic of China
Replace GB/T 25198-2010
pressure vessel head
Published on 2023-08-06
2024-03-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Table of contents
PrefaceⅠ
1 Scope 1
2 Normative reference documents 1
3 Terms and Definitions 1
4 symbol 2
5 Type parameters and markings 2
6 Manufacturing, inspection and acceptance5
7 Factory information15
8 product logo15
9 Coating and transportation packaging16
Appendix A (informative) Calculation formulas for the inner surface area, volume, mass and total height (total depth) of the head 17
Appendix B (informative) HHA hemispherical head type parameters 24
Appendix C (informative) EHA elliptical head type parameters 39
Appendix D (informative) EHB elliptical head type parameters 47
Appendix E (Informative) THA Disc Head Type Parameters 49
Appendix F (Informative) THB Disc Head Type Parameters 57
Appendix G (informative) SDH spherical head type parameters 59
Appendix H (informative) Head ordering technical conditions 70
Appendix I (informative) Head forming thickness reduction rate 71
Appendix J (informative) Head groove type and code 74
Appendix K (informative) Head product certificate and data report 76
Appendix L (informative) Density of common materials 78
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document replaces GB/T 25198-2010 "Pressure Vessel Head". Compared with GB/T 25198-2010, except for structural adjustment and editing
In addition to sexual changes, the main technical changes are as follows.
---Added terms and definitions (see Chapter 3);
---Changed the nominal diameter of the head DN to the diameter of the head D (the inner diameter or outer diameter of the head) (see Chapter 4, Chapter 3 of the.2010 edition);
---Changed the shapes and parameters of the elliptical head and dished head based on the outer diameter (see 5.1, Table 1,.2010 version of 4.1,
Table 1);
---The head type parameters have been changed, the conical head type code has been changed, and the conical head type without straight edges has been added (see
5.1,.2010 version 4.1, 4.2);
---Changed the head mark (see 5.2, 4.3 of the.2010 version);
--- Added requirements for risk assessment and control of the manufacturing environment and head manufacturing as well as supervisory inspection (see 6.1.5, 6.1.6, 6.1.7);
---Changed the relevant content of raw blank preparation, adjusted the material content to the manufacturing, inspection and acceptance chapters, and added material segmentation
and marking provisions (see 6.2, 6.3, 6.4, Chapter 6 of the.2010 edition);
---Added requirements for heads of pressure vessels made of zirconium [see 6.2.1f), 6.6.2.5];
---Increased the requirements for composite panel materials, increased and clarified the requirements for performance assurance after processing of incoming materials, and changed the corrosion resistance inspection
inspection requirements (see 6.2.2, 6.2.3, 6.2.4, 5.2, 5.3 of the.2010 edition);
---Changed the requirements for grinding and repair welding (see 6.5.2, 6.2.2 of the.2010 edition);
---Changed the requirements for bevel processing and surface (see 6.5.3, 6.2.3 of the.2010 edition);
---Changed the requirements for the layout of panels and splicing welds (see 6.5.4, 6.3.2 of the.2010 edition);
---Changed the regulations on the color of titanium and titanium alloy head welds and heat-affected zone surfaces, and added zirconium head welds and heat-affected zone surfaces
Color regulations (see 6.5.4.7, 6.2.9 of the.2010 edition);
---Changed the original head forming content and added forming inspection (see 6.6, 6.7, 6.3 of the.2010 edition);
---The heating method and general requirements have been changed, and the requirements for process heating, effective heating zone determination regulations and heat treatment measurement records have been added.
According to the requirements for recording, the requirements for heating media have been adjusted (see 6.6.2.1, 6.3.1.1, 6.3.1.4, and 6.3.1.5 of the.2010 edition);
--- Added requirements for heating temperature control of zirconium and zirconium composite plates (see 6.6.2.5, 6.8.3.7);
---Added the recommended temperature for warm forming processing of austenitic stainless steel heads (see 6.6.2.6);
---Added the control requirement that the inner circle circumference or inner circle diameter of the composite plate head should be used as the docking reference [see 6.7.6c)];
---Changed the diameter range, outer circle circumference and inner circle diameter tolerance requirements (see Table 5);
---Changed the tolerance requirements for the shape and size of the head, and added the ability to use other measurement methods (see 6.7.9,.2010 version
6.3.8);
---Increased the ferrite content of austenitic stainless steel heads with design temperatures below -40°C and strain strengthening treatment
Control and measurement requirements [see 6.7.14, 6.8.3.2a)];
--- Added requirements for heat treatment documents and automatic recording of heat treatment temperature (see 6.8.1.2, 6.8.1.3);
---Changed oval, disc and conical seals made of aluminum-magnesium alloy, aluminum-magnesium silicon alloy, titanium and titanium alloy, brass (except H96)
After head cold forming, the deformation rate value is used to determine whether to perform annealing treatment (see 6.8.3.3, 6.8.3.4, 6.8.3.5,.2010 edition
6.4.5.2, 6.4.5.3, 6.4.5.4);
---Added that the impact of the flat plate deformation rate on head manufacturing should be considered [see 6.8.3.8b)];
--- Added requirements for product test pieces/base metal heat treatment test pieces (see 6.9);
---Added non-destructive testing methods and changed relevant requirements (see 6.10, 6.5 of the.2010 edition);
---Changed the requirements for factory information (see Chapter 7, Chapter 7 of the.2010 edition);
---Added product logo (see Chapter 8).
Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.
This document is proposed and coordinated by the National Boiler and Pressure Vessel Standardization Technical Committee (SAC/TC262).
This document was drafted by. Hefei General Machinery Research Institute Co., Ltd., Sinopec Engineering Construction Co., Ltd., Changzhou Kuangda Weide Machinery
Co., Ltd., Yixing Beihai Head Co., Ltd., China Special Equipment Inspection and Research Institute, Zhejiang University, Dalian Dingjin General Equipment Manufacturing Co., Ltd.
Co., Ltd., Henan Shenzhou Precision Manufacturing Co., Ltd., Erzhong (Deyang) Heavy Equipment Co., Ltd., Hefei General Special Materials Equipment Co., Ltd.
Company, China Wuhuan Engineering Co., Ltd., Dalian Jinzhou Heavy Machinery Group Co., Ltd.
The main drafters of this document. Zhang Yijun, Wang Bing, Duan Rui, Zheng Jinyang, Yang Qinggao, Zhang Binfeng, Chen Zhiwei, Wei Shutao, Guo Xuehua, Liu Guofu,
Wu Pengxiang, Wang Yingjun, Xu Caifu, Liu Jing, Li Keming.
This document was first published in.2010 and this is the first revision.
pressure vessel head
1 Scope
This document specifies steel, non-ferrous metals (aluminum and aluminum alloys, copper and copper alloys, titanium and titanium alloys, nickel and nickel alloys, zirconium and zirconium alloys) and
Types, type parameters and manufacturing, inspection and acceptance requirements of heads for composite plate pressure vessels.
This document is applicable to hemispherical and elliptical pressure vessels whose blanks are whole plates or assembled plates and are formed by stamping, spinning, rolling or splitting.
Shaped, dish-shaped, spherical crown, flat-bottomed and conical heads.
The manufacturing, inspection and acceptance requirements for heads for atmospheric pressure vessels and other pressure-bearing equipment may also be implemented with reference to this document.
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations
For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to
this document.
GB/T 150 (all parts) Pressure vessels
GB/T 9452 Method for determination of effective heating zone of heat treatment furnace
GB/T 12337 Steel spherical storage tank
GB/T 26929 Pressure vessel terminology
JB4732 Steel Pressure Vessels---Analysis and Design Standards
JB/T 4734 Aluminum welding container
JB/T 4745 titanium welded container
JB/T 4755 Copper pressure vessels
JB/T 4756 Nickel and nickel alloy pressure vessels
NB/T 10558 Pressure vessel coating and transportation packaging
NB/T 47002 (all parts) Composite plates for pressure vessels
NB/T 47011 Zirconium pressure vessels
NB/T 47013.2 Non-destructive testing of pressure equipment Part 2.Radiographic testing
NB/T 47013.3 Non-destructive testing of pressure equipment Part 3.Ultrasonic testing
NB/T 47013.4 Non-destructive testing of pressure equipment Part 4.Magnetic particle testing
NB/T 47013.5 Non-destructive testing of pressure equipment Part 5.Penetration testing
NB/T 47013.7 Non-destructive testing of pressure equipment Part 7.Visual inspection
NB/T 47013.10 Non-destructive testing of pressure equipment Part 10.Ultrasonic testing using diffraction time difference method
NB/T 47013.11 Non-destructive testing of pressure equipment Part 11.X-ray digital imaging testing
TSGZ6002 Special Equipment Welding Operator Assessment Rules
TSGZ8001 Assessment rules for non-destructive testing personnel of special equipment
3 Terms and definitions
GB/T 150 (all parts), GB/T 26929, JB4732, JB/T 4734, JB/T 4745, JB/T 4755, JB/T 4756 and
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