GB/T 7233.1-2023 PDF English
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Steel castings - Ultrasonic testing - Part 1: Steel castings for general purposes
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| GB/T 7233.1-2009 | English | 85 |
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Steel castings -- Ultrasonic examination -- Part 1: Steel castings for general purposes
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| GB/T 7233-1987 | English | 519 |
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Methods for ultrasonic testing and for specifying quality levels of steel castings
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GB/T 7233.1-2023: Steel castings - Ultrasonic testing - Part 1: Steel castings for general purposes
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GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.040.20
CCS J 31
Replacing GB/T 7233.1-2009
Steel Castings – Ultrasonic Testing –
Part 1.Steel Castings for General Purposes
(ISO 4992-1.2020, MOD)
Issued on. MARCH 17, 2023
Implemented on. OCTOBER 01, 2023
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
Introduction... 5
1 Scope... 6
2 Normative References... 6
3 Terms and Definitions... 7
4 General Requirements... 8
5 Testing Method... 13
Appendix A (Informative) Structural Changes between this Document and ISO 4992-
1.2020... 23
Appendix B (Informative) Technical Differences and Their Causes between This
Document and ISO 4992-1.2020... 25
Appendix C (Informative) Diameter of Sound Beam... 28
Appendix D (Informative) Display Type Generated by Typical Defects... 30
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This Document is Part 1 of GB/T 7233 Steel Castings – Ultrasonic Testing. GB/T 7233 has
published the following parts.
--- Part 1.Steel Castings for General Purposes;
--- Part 2.Steel Castings for Highly Stressed Components.
This Document replaced GB/T 7233.1-2009 Steel Castings – Ultrasonic Examination – Part 1.
Steel Castings for General Purposes. Compared with GB/T 7233.1-2009, the major technical
changes of this Part are as follows besides the structural adjustments and editorial modifications.
a) Change the material in the scope of application of the standard (see Clause 1 of this
Edition; Clause 1 of the 2009 Edition);
b) Change some normative references (see Clause 2 of this Edition; Clause 2 of the 2009
Edition);
c) Add terms and definitions (see 3.5, 3.7 of this Edition);
d) Add the relevant content of the maximum limit value of allowable defects (see 4.3.1, 4.3.2
of this Edition);
e) Change the general principles of testing and the standards cited by equipment (see 5.1,
5.3.1~5.3.3 of this Edition; 5.1, 5.3.1~5.3.3 of the 2009 Edition);
f) Add couplant, the preparation of scanning surface of steel castings, range setting, general
principles of sensitivity adjustment, transmission correction, detection of defects,
characteristics of defects and standards cited in general principles of quantification (see
5.3.4, 5.4, 5.5.2, 5.5.3.1~5.5.3.3, 5.5.7.1 of this Edition);
g) Add reference test block (see 5.3.5 of this Edition).
This Document modified and used ISO 4992-1.2020 Steel Castings – Ultrasonic Testing – Part
1.Steel Castings for General Purposes.
Compared with ISO 4992-1.2020, this Document has more structural adjustments; see
Appendix A for a list of changes in structure number between the two documents.
Compared with ISO 4992-1.2020, this document has many technical differences, and the outer
margins of the terms involved are marked with a vertical single line (|). See Appendix B for a
list of these technical differences and their causes.
This Document made the following editorial modifications.
--- 3.6, delete NOTE of 3.8 in ISO 4992-1;
--- Delete the bibliography.
Please note some contents of this Document may involve patents. The issuing agency of this
Document shall not assume the responsibility to identify these patents.
This Document was proposed by and under the jurisdiction of National Technical Committee
on Castings of Standardization Administration of China (SAC/TC 54).
Chief drafting organizations of this Document. Shenyang Research Institute of Foundry Co.,
Ltd.; Anhui Yingliu Group Huoshan Casting Co., Ltd.; NCS Testing Technology Co., Ltd.;
China Baoji Bridge Group Co., Ltd.; Zhejiang Dalong Special Materials Co., Ltd.; Lanzhou LS
Testing Technology Co., Ltd.; Microgreat Casting Co., Ltd.; Xiangyang Jinnaite Machinery Co.,
Ltd.; Tongyu Heavy Industry Co., Ltd.; Jiangxi Fuling Casting Co., Ltd.; Jinyun County Creer
Testing Equipment Co., Ltd.; Shandong Zhenting Jingong Piston Co., Ltd.; Shandong
Automobile Manufacturing Co., Ltd.; Northern Heavy Industries Group Co., Ltd.; Yantai
Standard Measurement Inspection Center; Erzhong (Deyang) Heavy Equipment Co., Ltd.;
Harbin Electric Machinery Company Limited; CITIC Heavy Industries Co., Ltd.; CRRC
Changchun Railway Vehicles Co., Ltd.; and CRRC Qiqihar Rolling Stock Co., Ltd.
Chief drafting staffs of this Document. Li Xingjie, Li Jinmei, Sun Chungui, Guo Zongshan,
Zhang Zhen, Du Yingliu, Shu Xuecheng, Zhang Jianing, Cheng Shancheng, Su Zaichun, Hou
Chunyu, Ma Zhengqiang, Song Quanzhi, Tian Meng, Wang Lihua, Zhang Jianwei, Jiang
Chunhong, Wang Hanchao, Xu Wenda, Wu Fangming, Du Ming, Zhang Zhouxu, Pang Wenhua,
Liu Yuanyi, Wang Qingyu, Jia Guanfei, Shuai Dejun, Lu Qifeng, Haugn Liankai, Chen Tao,
Cui Lanfang, Hu Zhonghua, Zu Yuwei, Wang Kai, Huang Weizhao, Liu Guanglei, Wang
Yongfeng, Wei Zhihui, Zhang Wen, and Wang Xuan.
The historical editions replaced by this Document are as follows.
--- GB/T 7233 was first-time published in 1987;
--- GB/T 7233.1 was first-time published in 2009;
--- It is first-time revised hereby.
1 Scope
This Document specifies the general requirements and testing methods for ultrasonic testing of
steel castings for general purposes.
This Document applies to the ultrasonic testing of general-purposed steel castings having a
grain refining heat treatment and a wall thickness not exceeding 600 mm. For steel castings
with a wall thickness greater than 600mm, if there is no special requirement, refer to it.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 9445 Non-destructive testing - Qualification and certification of NDT personnel
(GB/T 9445-2015, ISO 9712.2012, IDT)
GB/T 12604.1 Non-destructive testing – Terminology - Ultrasonic testing (GB/T 12604.1-
2020, ISO 5577.2017, MOD)
3 Terms and Definitions
For the purposes of this Document, the terms and definitions given in GB/T 12604.1, GB/T
39240, GB/T 39242, GB/T 39292 and the following apply.
A defect with two-dimensional measurable dimension.
Welding to ensure that steel castings meet their required quality.
4 General Requirements
The most appropriate testing method shall be used to detect all inspected areas of the steel
castings (if the shape of the steel castings allows).
According to the size of steel castings to be assembled (finishing), it is divided into inner layer
and outer layer, and the wall thickness division is shown in Figure 2.
5 Testing Method
The couplant that complies with GB/T 39240 shall be used; and the same couplant shall be used
in the verification and subsequent testing. The coupling effect is checked using one or more
bottom waves parallel to the bottom.
For the recorded defective area (see 5.5.5), it shall be further verified the type, shape, size, and
location.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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